YZFR1W YZFR1WC
YZFR1W
YZFR1WC
SERVICE MANUAL
LIT-11616-20-53
4C8-28197-10
EAS20040
YZFR1W/YZFR1WC
SERVICE MANUAL
©2006 by Yamaha Motor
Corporation, U.S.A.
First edition, October 2006
All rights reserved. Any reproduction
or unauthorized use without the written
permission of Yamaha Motor Corporation,
U.S.A. is expressly prohibited.
Printed in U.S.A.
P/N LIT-11616-20-53
EAS20070
NOTICE
This manual was produced by the Yamaha Motor Company, Ltd. primarily for use by Yamaha dealers and their qualified mechanics. It is not possible to include all the knowledge of a mechanic in one
manual. Therefore, anyone who uses this book to perform maintenance and repairs on Yamaha
vehicles should have a basic understanding of mechanics and the techniques to repair these types
of vehicles. Repair and maintenance work attempted by anyone without this knowledge is likely to
render the vehicle unsafe and unfit for use.
This model has been designed and manufactured to perform within certain specifications in regard
to performance and emissions. Proper service with the correct tools is necessary to ensure that the
vehicle will operate as designed. If there is any question about a service procedure, it is imperative
that you contact a Yamaha dealer for any service information changes that apply to this model. This
policy is intended to provide the customer with the most satisfaction from his vehicle and to conform
to federal environmental quality objectives.
Yamaha Motor Company, Ltd. is continually striving to improve all of its models. Modifications and
significant changes in specifications or procedures will be forwarded to all authorized Yamaha dealers and will appear in future editions of this manual where applicable.
NOTE:
• This Service Manual contains information regarding periodic maintenance to the emission control
system. Please read this material carefully.
• Designs and specifications are subject to change without notice.
EAS20080
IMPORTANT MANUAL INFORMATION
Particularly important information is distinguished in this manual by the following.
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR
SAFETY IS INVOLVED!
WARNING
Failure to follow WARNING instructions could result in severe injury or death to
the vehicle operator, a bystander or a person checking or repairing the vehicle.
CAUTION:
A CAUTION indicates special precautions that must be taken to avoid damage
to the vehicle.
NOTE:
A NOTE provides key information to make procedures easier or clearer.
EAS20090
HOW TO USE THIS MANUAL
This manual is intended as a handy, easy-to-read reference book for the mechanic. Comprehensive
explanations of all installation, removal, disassembly, assembly, repair and check procedures are
laid out with the individual steps in sequential order.
• The manual is divided into chapters and each chapter is divided into sections. The current section
title is shown at the top of each page “1”.
• Sub-section titles appear in smaller print than the section title “2”.
• To help identify parts and clarify procedure steps, there are exploded diagrams at the start of each
removal and disassembly section “3”.
• Numbers are given in the order of the jobs in the exploded diagram. A number indicates a disassembly step “4”.
• Symbols indicate parts to be lubricated or replaced “5”.
Refer to “SYMBOLS”.
• A job instruction chart accompanies the exploded diagram, providing the order of jobs, names of
parts, notes in jobs, etc “6”.
• Jobs requiring more information (such as special tools and technical data) are described sequentially “7”.
EAS20100
16.Replace the part
SYMBOLS
The following symbols are used in this manual
for easier understanding.
NOTE:
The following symbols are not relevant to every
vehicle.
2
3
4
5
6
7
8
T.
1
R.
9
10
E
12
11
13
B
15
M
G
14
M
LS
16
LT
New
1. Serviceable with engine mounted
2. Filling fluid
3. Lubricant
4. Special tool
5. Tightening torque
6. Wear limit, clearance
7. Engine speed
8. Electrical data
9. Engine oil
10.Gear oil
11.Molybdenum-disulfide oil
12.Wheel-bearing grease
13.Lithium-soap-based grease
14.Molybdenum-disulfide grease
15.Apply locking agent (LOCTITE®)
EAS20110
TABLE OF CONTENTS
GENERAL INFORMATION
1
SPECIFICATIONS
2
PERIODIC CHECKS AND ADJUSTMENTS
3
CHASSIS
4
ENGINE
5
COOLING SYSTEM
6
FUEL SYSTEM
7
ELECTRICAL SYSTEM
8
TROUBLESHOOTING
9
GENERAL INFORMATION
IDENTIFICATION ..........................................................................................1-1
VEHICLE IDENTIFICATION NUMBER...................................................1-1
MODEL LABEL.......................................................................................1-1
FEATURES ...................................................................................................1-2
FI SYSTEM .............................................................................................1-3
IMPORTANT INFORMATION .....................................................................1-12
PREPARATION FOR REMOVAL AND DISASSEMBLY........................1-12
REPLACEMENT PARTS.......................................................................1-12
GASKETS, OIL SEALS AND O-RINGS................................................1-12
LOCK WASHERS/PLATES AND COTTER PINS .................................1-12
BEARINGS AND OIL SEALS ...............................................................1-13
CIRCLIPS .............................................................................................1-13
CHECKING THE CONNECTIONS .............................................................1-14
SPECIAL TOOLS........................................................................................1-15
1
IDENTIFICATION
EAS20130
IDENTIFICATION
EAS20140
VEHICLE IDENTIFICATION NUMBER
The vehicle identification number “1” is
stamped into the right side of the steering
head pipe.
EAS20150
MODEL LABEL
The model label “1” is affixed to the frame. This
information will be needed to order spare
parts.
1-1
FEATURES
EAS20170
FEATURES
OUTLINE OF THE FI SYSTEM
The main function of a fuel supply system is to provide fuel to the combustion chamber at the optimum air-fuel ratio in accordance with the engine operating conditions and the atmospheric temperature. In the conventional carburetor system, the air-fuel ratio of the mixture that is supplied to the
combustion chamber is created by the volume of the intake air and the fuel that is metered by the jet
used in the respective carburetor.
Despite the same volume of intake air, the fuel volume requirement varies by the engine operating
conditions, such as acceleration, deceleration, or operating under a heavy load. Carburetors that
meter the fuel through the use of jets have been provided with various auxiliary devices, so that an
optimum air-fuel ratio can be achieved to accommodate the constant changes in the operating conditions of the engine.
As the requirements for the engine to deliver more performance and cleaner exhaust gases
increase, it becomes necessary to control the air-fuel ratio in a more precise and finely tuned manner. To accommodate this need, this model has adopted an electronically controlled fuel injection
(FI) system, in place of the conventional carburetor system. This system can achieve an optimum
air-fuel ratio required by the engine at all times by using a microprocessor that regulates the fuel
injection volume according to the engine operating conditions detected by various sensors.
The adoption of the FI system has resulted in a highly precise fuel supply, improved engine
response, better fuel economy, and reduced exhaust emissions.
14.Starting circuit cut-off relay
15.Speed sensor
16.EXUP servo motor
17.O2 sensor
18.Crankshaft position sensor
19.Coolant temperature sensor
20.Spark plug
21.Ignition coil
22.Cylinder identification sensor
1.
2.
3.
4.
5.
Intake air temperature sensor
Engine trouble warning light
Air induction system solenoid
Atmospheric pressure sensor
Throttle position sensor (for throttle cable
pulley)
6. Throttle servo motor
7. Throttle position sensor (for throttle valves)
8. Intake funnel servo motor
9. Injector
10.Intake air pressure sensor
11.Fuel pump
12.Lean angle sensor
13.ECU (engine control unit)
1-2
FEATURES
EAS4C81010
FI SYSTEM
The fuel pump delivers fuel to the fuel injector via the fuel filter. The pressure regulator maintains the
fuel pressure that is applied to the fuel injector at only 324 kPa (3.24 kg/cm2, 46.1 psi). Accordingly,
when the energizing signal from the ECU energizes the fuel injector, the fuel passage opens, causing the fuel to be injected into the intake manifold only during the time the passage remain open.
Therefore, the longer the length of time the fuel injector is energized (injection duration), the greater
the volume of fuel that is supplied. Conversely, the shorter the length of time the fuel injector is energized (injection duration), the lesser the volume of fuel that is supplied.
The injection duration and the injection timing are controlled by the ECU. Signals that are input from
the throttle position sensor (for throttle valves), throttle position sensor (for throttle cable pulley),
crankshaft position sensor, intake air pressure sensor, intake air temperature sensor, coolant temperature sensor, atmospheric pressure sensor, cylinder identification sensor, lean angle sensor, speed
sensor and O2 sensor enable the ECU to determine the injection duration. The injection timing is
determined through the signals from the crankshaft position sensor. As a result, the volume of fuel
that is required by the engine can be supplied at all times in accordance with the driving conditions.
12.Coolant temperature sensor
13.Crankshaft position sensor
14.Intake air pressure sensor
15.Throttle servo motor
16.Throttle body
17.Atmospheric pressure sensor
18.Air filter case
19.Intake funnel servo motor
A. Fuel system
B. Air system
C. Control system
1.
2.
3.
4.
5.
6.
Fuel pump
Injector
Cylinder identification sensor
ECU (engine control unit)
Throttle position sensor (for throttle valves)
Throttle position sensor (for throttle cable
pulley)
7. Speed sensor
8. Intake air temperature sensor
9. Lean angle sensor
10.O2 sensor
11.Catalytic converter
1-3
FEATURES
EAS4C81011
YCC-T (Yamaha Chip Controlled Throttle) YCC-I (Yamaha Chip Controlled Intake)
Mechanism characteristics
Yamaha developed the YCC-T and YCC-I system employing the most advanced electronic control
technologies. Electronic control throttle systems have been used on automobiles, but Yamaha has
developed a faster, more compact system specifically for the needs of a sports motorcycle. The
Yamaha-developed system has a high-speed calculating capacity that produces computations of
running conditions every 1/1000th of a second.
The YCC-T system is designed to respond to the throttle action of the rider by having the ECU
instantaneously calculate the ideal throttle valve opening and generate signals to operate the motordriven throttle valves and thus actively control the intake air volume.
The ECU contains three CPUs with a capacity about five times that of conventional units, making it
possible for the system to respond extremely quickly to the slightest adjustments made by the rider.
In particular, optimized control of the throttle valve opening provides the optimum volume of intake
air for easy-to-use torque, even in a high-revving engine.
The YCC-I system calculates the value from the engine revolution number and throttle opening rate,
activates the intake air funnel with the electronic control motor drive to control the intake pipe length
in order to gain the high power output in all revolution ranges from low speeds to high speeds.
Aims and advantages of using YCC-T system
• Increased engine power
By shortening the air intake path, higher engine speed is possible → Increased engine power.
• Improved driveability
Air intake volume is controlled according to the operating conditions → Improved throttle response
to meet engine requirement.
Driving force is controlled at the optimal level according to the transmission gear position and
engine speed → Improved throttle control.
• Engine braking control
Due to the throttle control, optimal engine braking is made possible.
• Simplified idle speed control (ISC) mechanism
The bypass mechanism and ISC actuator are eliminated → A simple mechanism is used to maintain a steady idle speed.
• Reduced weight
Compared to using a sub-throttle mechanism, weight is reduced.
A. To throttle grip
1. Throttle position sensor (for throttle cable
pulley)
2. Throttle servo motor
3. Throttle position sensor (for throttle valves)
4. Throttle valves
5. Throttle cable pulley with linkage guard
1-4
FEATURES
Aims and advantages of using YCC-I system
• Improvement of the engine power characteristics
The high power design in all ranges is now provided by having both two features of the short
intake function to ensure the power at the high speed revolution of engine, and the long intake
function to ensure the power in the practical use range.
• Intake pipe length switching control using the motor
The intake pipe length switching operation in a minute time is now available by means of the motor
drive using the electronic control.The smooth power characteristic is provided, which does not let
an operator feel the switching action by the optimization of its switching revolution number and the
most suitable application of engine at the time of changing the revolution.
A. Down position (long intake)
(Low rpm to Mid rpm)
B. Up position (short intake)
(High rpm)
1-5
FEATURES
YCC-T/YCC-I system outline
19.Intake funnel servo motor driver
20.Intake funnel servo motor
1. Throttle position sensor (for throttle cable
pulley)
2. Throttle servo motor
3. Throttle position sensor (for throttle valves)
4. ECU (engine control unit)
5. ETV main CPU (32 bit)
6. ETV sub CPU (16 bit)
7. FI CPU (32 bit)
8. Throttle servo motor driver
9. Throttle servo motor driver operation sensing/shut off circuit
10.Throttle servo motor driver operation sensing
feedback/emergency stop
11.Emergency stop
12.Engine revolution (pulse signal)
13.Sensor input
14.Neutral switch
15.Crankshaft position sensor
16.Speed sensor
17.Coolant temperature sensor
18.Atmospheric pressure sensor
1-6
FEATURES
YCC-T/YCC-I control outline
15.Throttle servo motor
16.ECU (engine control unit)
17.Base map
18.Idle speed control
19.Calculated throttle valve opening angle
20.Base map
21.Air funnel position (Calculation value)
22.Intake funnel servo motor
1. Throttle position sensor (for throttle cable
pulley)
2. Throttle position sensor (for throttle valves)
3. Crankshaft position sensor
4. Speed sensor
5. Coolant temperature sensor
6. Neutral switch
7. Atmospheric pressure sensor
8. Accelerator position (two signals)
9. Throttle position (two signals)
10.Engine revolution
11.Vehicle speed
12.Coolant temperature
13.Neutral/In gear
14.Atmospheric pressure
1-7
FEATURES
• To switch the speedometer and odometer/
tripmeter displays between kilometers and
miles, press the “SELECT” button for at least
one second.
EAS4C81024
INSTRUMENT FUNCTIONS
Multi-function meter unit
Tachometer
1.
2.
3.
4.
5.
6.
Clock
Speedometer
“SELECT” button
“RESET” button
Tachometer
Coolant temperature display/air intake temperature display
7. Odometer/tripmeters/fuel reserve tripmeter/ stopwatch
8. Shift timing indicator light
1. Tachometer
2. Tachometer red zone
The electric tachometer allows the rider to
monitor the engine speed and keep it within
the ideal power range.
When the key is turned to “ON”, the tachometer needle will sweep once across the r/min
range and then return to zero r/min in order to
test the electrical circuit.
EWA4C81008
WARNING
Be sure to stop the vehicle before making
any setting changes to the multi-function
meter unit.
ECA4C81017
CAUTION:
Do not operate the engine in the tachometer red zone.
Red zone: 13750 r/min and above
The multi-function meter unit is equipped with
the following:
• a speedometer (which shows the riding
speed)
• a tachometer (which shows engine speed)
• an odometer (which shows the total distance
traveled)
• two tripmeters (which show the distance traveled since they were last set to zero)
• a fuel reserve tripmeter (which shows the
distance traveled since the fuel level warning
light came on)
• a clock
• a coolant temperature display
• an air intake temperature display
• a self-diagnosis device
• a display brightness and shift timing indicator
light control mode
Clock mode
1. Clock
Turn the key to “ON”.
To set the clock
1. Push the “SELECT” button and “RESET”
button together for at least two seconds.
2. When the hour digits start flashing, push
the “RESET” button to set the hours.
3. Push the “SELECT” button, and the minute
digits will start flashing.
NOTE:
• Be sure to turn the key to “ON” before using
the “SELECT” and “RESET” buttons.
1-8
FEATURES
4. Push the “RESET” button to set the minutes.
5. Push the “SELECT” button and then
release it to start the clock.
3. Push the “SELECT” button again to reset
the stopwatch.
Split-time measurement
1. Push the “RESET” button to start the stopwatch.
2. Push the “RESET” button or start switch
“ ” to measure split-times. (The colon “:”
will start flashing.)
3. Push the “RESET” button or start switch
“ ” to measure split-times. (The colon “:”
will start flashing.)
4. Push the “SELECT” button to reset the
stopwatch.
Odometer, tripmeter, and stopwatch modes
NOTE:
To change the display back to the prior mode,
push the “SELECT” button for a few seconds.
1. Odometer/tripmeter/fuel reserve tripmeter
Push the “SELECT” button to switch the display between the odometer mode “ODO” and
the tripmeter modes “TRIP A” and “TRIP B”
and the stopwatch mode in the following order:
TRIP A → TRIP B → ODO → Stopwatch →
TRIP A
If the fuel level warning light comes on, the
odometer display will automatically change to
the fuel reserve tripmeter mode “F-TRIP” and
start counting the distance traveled from that
point. In that case, push the “SELECT” button
to switch the display between the various tripmeter, odometer, and stopwatch modes in the
following order:
F-TRIP → Stopwatch → TRIP A → TRIP B →
ODO → F-TRIP
To reset a tripmeter, select it by pushing the
“SELECT” button, and then push the “RESET”
button for at least one second. If you do not
reset the fuel reserve tripmeter manually, it will
reset itself automatically and the display will
return to the prior mode after refueling and
traveling 5 km (3 mi).
Coolant temperature display
1. Coolant temperature display
The coolant temperature display indicates the
temperature of the coolant.
Push the “RESET” button to switch the coolant
temperature display to the air intake temperature display.
NOTE:
When the coolant temperature display is
selected, “C” is displayed for one second, and
then the coolant temperature is displayed.
ECA4C81018
Stopwatch mode
To change the display to the stopwatch mode,
select it by pushing the “SELECT” button. (The
stopwatch digits will start flashing.) Release
the “SELECT” button, and then push it again
for a few seconds until the stopwatch digits
stop flashing.
Standard measurement
1. Push the “RESET” button to start the stopwatch.
2. Push the “SELECT” button to stop the stopwatch.
CAUTION:
Do not operate the engine if it is overheated.
1-9
FEATURES
Display brightness and shift timing indicator light control mode
Air intake temperature display
1. Air intake temperature display
1. Display brightness
2. Shift timing indicator light activation/deactivation
3. Shift timing indicator light
4. Brightness level
The air intake temperature display indicates
the temperature of the air drawn into the air filter case. Push the “RESET” button to switch
the coolant temperature display to the air
intake temperature display.
This mode cycles through five control functions, allowing you to make the following settings in the order listed below.
Display brightness:
• This function allows you to adjust the brightness of the displays and tachometer to suit
the outside lighting conditions.
• Shift timing indicator light activity:
This function allows you to choose whether
or not the indicator light should be activated
and whether it should flash or stay on when
activated.
• Shift timing indicator light activation:
This function allows you to select the engine
speed at which the indicator light will be activated.
• Shift timing indicator light deactivation:
This function allows you to select the engine
speed at which the indicator light will be
deactivated.
• Shift timing indicator light brightness:
This function allows you to adjust the brightness of the indicator light to suit your preference.
NOTE:
• Even if the air intake temperature is set to be
displayed, the coolant temperature warning
light comes on when the engine overheats.
• When the key is turned to “ON”, the coolant
temperature is automatically displayed, even
if the air intake temperature was displayed
prior to turning the key to “OFF”.
• When the air intake temperature display is
selected, “A” is displayed before the temperature.
Self-diagnosis device
1. Error code display
NOTE:
In this mode, the right display shows the current setting for each function (except the shift
timing indicator light activity function).
This model is equipped with a self-diagnosis
device for various electrical circuits.
If any of those circuits are defective, the engine
trouble warning light will come on, and then the
display will indicate a two-digit error code.
To adjust the brightness of the multifunction
meter displays and tachometer
1. Turn the key to “OFF”.
2. Push and hold the “SELECT” button.
3. Turn the key to “ON”, and then release the
“SELECT” button after five seconds.
1-10
FEATURES
4. Push the “RESET” button to select the
desired brightness level.
5. Push the “SELECT” button to confirm the
selected brightness level. The control
mode changes to the shift timing indicator
light activity function.
To set the shift timing indicator light activity
function
1. Push the “RESET” button to select one of
the following indicator light activity settings:
• The indicator light will stay on when activated. (This setting is selected when the
indicator light stays on.)
• The indicator light will flash when activated.
(This setting is selected when the indicator
light flashes four times per second.)
• The indicator light is deactivated; in other
words, it will not come on or flash. (This
setting is selected when the indicator light
flashes once every two seconds.)
2. Push the “SELECT” button to confirm the
selected indicator light activity. The control
mode changes to the shift timing indicator
light activation function.ry two seconds.)
To set the shift timing indicator light activation
function
• Be sure to set the deactivation function to a
higher engine speed than for the activation
function, otherwise the shift timing indicator
light will remain deactivated.
1. Push the “RESET” button to select the
desired engine speed for deactivating the
indicator light.
2. Push the “SELECT” button to confirm the
selected engine speed. The control mode
changes to the shift timing indicator light
brightness function.
To adjust the shift timing indicator light brightness
1. Push the “RESET” button to select the
desired indicator light brightness level.
2. Push the “SELECT” button to confirm the
selected indicator light brightness level.
The right display will return to the odometer
or tripmeter mode.
NOTE:
The shift timing indicator light activation function can be set between 7000 r/min and 15000
r/min. From 7000 r/min to 12000 r/min, the indicator light can be set in increments of 500 r/
min. From 12000 r/min to 15000 r/min, the indicator light can be set in increments of 200 r/
min.
1. Push the “RESET” button to select the
desired engine speed for activating the
indicator light.
2. Push the “SELECT” button to confirm the
selected engine speed. The control mode
changes to the shift timing indicator light
deactivation function.
To set the shift timing indicator light deactivation function
NOTE:
• The shift timing indicator light deactivation
function can be set between 7000 r/min and
15000 r/min. From 7000 r/min to 12000 r/
min, the indicator light can be set in increments of 500 r/min. From 12000 r/min to
15000 r/min, the indicator light can be set in
increments of 200 r/min.
1-11
IMPORTANT INFORMATION
EAS20180
IMPORTANT INFORMATION
EAS20190
PREPARATION FOR REMOVAL AND DISASSEMBLY
1. Before removal and disassembly, remove
all dirt, mud, dust and foreign material.
EAS20210
GASKETS, OIL SEALS AND O-RINGS
1. When overhauling the engine, replace all
gaskets, seals and O-rings. All gasket surfaces, oil seal lips and O-rings must be
cleaned.
2. During reassembly, properly oil all mating
parts and bearings and lubricate the oil
seal lips with grease.
2. Use only the proper tools and cleaning
equipment.
Refer to "SPECIAL TOOLS" on page 1-15.
3. When disassembling, always keep mated
parts together. This includes gears, cylinders, pistons and other parts that have
been “mated” through normal wear. Mated
parts must always be reused or replaced
as an assembly.
1.
2.
3.
4.
Oil
Lip
Spring
Grease
EAS20220
LOCK WASHERS/PLATES AND COTTER
PINS
After removal, replace all lock washers/plates
“1” and cotter pins. After the bolt or nut has
been tightened to specification, bend the lock
tabs along a flat of the bolt or nut.
4. During disassembly, clean all of the parts
and place them in trays in the order of disassembly. This will speed up assembly and
allow for the correct installation of all parts.
5. Keep all parts away from any source of fire.
EAS20200
REPLACEMENT PARTS
Use only genuine Yamaha parts for all replacements. Use oil and grease recommended by
Yamaha for all lubrication jobs. Other brands
may be similar in function and appearance, but
inferior in quality.
1-12
IMPORTANT INFORMATION
EAS20230
BEARINGS AND OIL SEALS
Install bearings “1” and oil seals “2” so that the
manufacturer’s marks or numbers are visible.
When installing oil seals, lubricate the oil seal
lips with a light coat of lithium-soap-based
grease. Oil bearings liberally when installing, if
appropriate.
ECA13300
CAUTION:
Do not spin the bearing with compressed
air because this will damage the bearing
surfaces.
EAS20240
CIRCLIPS
Before reassembly, check all circlips carefully
and replace damaged or distorted circlips.
Always replace piston pin clips after one use.
When installing a circlip “1”, make sure the
sharp-edged corner “2” is positioned opposite
the thrust “3” that the circlip receives.
1-13
CHECKING THE CONNECTIONS
EAS20250
CHECKING THE CONNECTIONS
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Check the leads, couplers, and connectors for
stains, rust, moisture, etc.
1. Disconnect:
• Lead
• Coupler
• Connector
2. Check:
• Lead
• Coupler
• Connector
Moisture → Dry with an air blower.
Rust/stains → Connect and disconnect
several times.
NOTE:
• If there is no continuity, clean the terminals.
• When checking the wire harness, perform
steps (1) to (3).
• As a quick remedy, use a contact revitalizer
available at most part stores.
3. Check:
• All connections
Loose connection → Connect properly.
NOTE:
If the pin “1” on the terminal is flattened, bend
it up.
4.
•
•
•
Connect:
Lead
Coupler
Connector
NOTE:
Make sure all connections are tight.
5. Check:
• Continuity
(with the pocket tester)
1-14
SPECIAL TOOLS
EAS20260
SPECIAL TOOLS
The following special tools are necessary for complete and accurate tune-up and assembly. Use
only the appropriate special tools as this will help prevent damage caused by the use of inappropriate tools or improvised techniques. Special tools, part numbers or both may differ depending on the
country.
When placing an order, refer to the list provided below to avoid any mistakes.
NOTE:
• For U.S.A. and Canada, use part number starting with “YM-”, “YU-”, or “ACC-”.
• For others, use part number starting with “90890-”.
Tool name/Tool No.
Illustration
Piston pin puller set
90890-01304
Piston pin puller
YU-01304
Reference
pages
5-71
Radiator cap tester
90890-01325
Radiator pressure tester
YU-24460-01
6-3
Radiator cap tester adapter
90890-01352
Radiator pressure tester adapter
YU-33984
6-3
Steering nut wrench
90890-01403
Spanner wrench
YU-33975
3-28, 4-60
Damper rod holder
90890-01423
Damping rod holder
YM-01423
4-52, 4-53
Oil filter wrench
90890-01426
YU-38411
3-12
1-15
SPECIAL TOOLS
Tool name/Tool No.
Illustration
Rod holder
90890-01434
Damper rod holder double ended
YM-01434
Reference
pages
4-51, 4-56
Rod puller
90890-01437
Universal damping rod bleeding tool set
YM-A8703
4-55, 4-56
Rod puller attachment (M12)
90890-01435
Universal damping rod bleeding tool set
YM-A8703
4-55, 4-56
Fork spring compressor
90890-01441
YM-01441
4-51, 4-56
Fork seal driver
90890-01442
Adjustable fork seal driver (36–46 mm)
YM-01442
4-54
Vacuum gauge
90890-03094
Carburetor synchronizer
YU-44456
3-7
Compression gauge
90890-03081
Engine compression tester
YU-33223
3-10
Extension
90890-04136
3-10
1-16
SPECIAL TOOLS
Tool name/Tool No.
Illustration
Valve spring compressor
90890-04019
YM-04019
Reference
pages
5-23, 5-29
Valve spring compressor attachment
90890-04108
Valve spring compressor adapter (22 mm)
YM-04108
5-23, 5-29
Middle driven shaft bearing driver
90890-04058
Bearing driver (40 mm)
YM-04058
6-11
Mechanical seal installer
90890-04078
Water pump seal installer
YM-33221-A
6-11
Universal clutch holder
90890-04086
YM-91042
5-47, 5-51
Valve guide remover (ø5)
90890-04097
Valve guide remover (5.0 mm)
YM-04097
5-25
Valve guide remover (ø4.5)
90890-04116
Valve guide remover (4.5 mm)
YM-04116
5-25
Valve guide installer (ø5)
90890-04098
Valve guide installer (5.0 mm)
YM-04098
5-25
1-17
SPECIAL TOOLS
Tool name/Tool No.
Illustration
Valve guide installer (ø4.5)
90890-04117
Valve guide installer (4.5 mm)
YM-04117
Reference
pages
5-25
Valve guide reamer (ø5)
90890-04099
Valve guide reamer (5.0 mm)
YM-04099
5-25
Valve guide reamer (ø4.5)
90890-04118
Valve guide reamer (4.5mm)
YM-04118
5-25
Ignition checker
90890-06754
Opama pet-4000 spark checker
YU-34487
8-84
Yamaha bond No.1215
(Three Bond No.1215)
90890-85505
5-67, 6-11
Pivot shaft wrench
90890-01471
Frame spanner socket
YM-01471
5-7
Pivot shaft wrench adapter
90890-01476
5-7
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
1-14, 5-41, 8-75,
8-76, 8-77, 8-80,
8-81, 8-82, 8-83,
8-84, 8-85, 8-86,
8-87, 8-88, 8-89,
8-90, 8-91, 8-92
1-18
SPECIAL TOOLS
Tool name/Tool No.
Illustration
Oil pressure gauge adapter
90890-03139
Reference
pages
3-13
Valve lapper
90890-04101
Valve lapping tool
YM-A8998
3-5
Fuel pressure adapter
90890-03176
YM-03176
7-6
Pressure gauge
90890-03153
YU-03153
3-13, 7-6
Camshaft wrench
90890-04143
YM-04143
5-11, 5-16
Ring nut wrench
90890-01507
YM-01507
4-67, 4-69
Damper rod holder (22 mm)
90890-01365
4-68, 4-69
1-19
SPECIFICATIONS
GENERAL SPECIFICATIONS ......................................................................2-1
ENGINE SPECIFICATIONS..........................................................................2-2
CHASSIS SPECIFICATIONS........................................................................2-8
ELECTRICAL SPECIFICATIONS...............................................................2-10
TIGHTENING TORQUES............................................................................2-12
GENERAL TIGHTENING TORQUE SPECIFICATIONS.......................2-12
ENGINE TIGHTENING TORQUES ......................................................2-13
CHASSIS TIGHTENING TORQUES ....................................................2-17
LUBRICATION POINTS AND LUBRICANT TYPES ..................................2-20
ENGINE ................................................................................................2-20
CHASSIS ..............................................................................................2-21
LUBRICATION SYSTEM CHART AND DIAGRAMS .................................2-23
ENGINE OIL LUBRICATION CHART ...................................................2-23
LUBRICATION DIAGRAMS ..................................................................2-25
COOLING SYSTEM DIAGRAMS ...............................................................2-35
CABLE ROUTING ......................................................................................2-39
2
GENERAL SPECIFICATIONS
EAS20280
GENERAL SPECIFICATIONS
Model
Model
4C84 (U.S.A.)
4C85 (California)
Dimensions
Overall length
Overall width
Overall height
Seat height
Wheelbase
Ground clearance
Minimum turning radius
2060 mm (81.1 in)
720 mm (28.3 in)
1110 mm (43.7 in)
835 mm (32.9 in)
1415 mm (55.7 in)
135 mm (5.31 in)
3400 mm (133.9 in)
Weight
With oil and fuel
Maximum load
200 kg (441 lb)
195 kg (430 lb)
2-1
ENGINE SPECIFICATIONS
EAS20290
ENGINE SPECIFICATIONS
Engine
Engine type
Displacement
Cylinder arrangement
Bore × stroke
Compression ratio
Standard compression pressure (at sea level)
Liquid cooled 4-stroke, DOHC
998.0 cm³
Forward-inclined parallel 4-cylinder
77.0 × 53.6 mm (3.03 × 2.11 in)
12.70 :1
1480 kPa/350 r/min (210.5 psi/350 r/min) (14.8
kgf/cm²/350 r/min)
Electric starter
Starting system
Fuel
Recommended fuel
Fuel tank capacity
Fuel reserve amount
Premium unleaded gasoline only
18.0 L (4.76 US gal) (3.96 Imp.gal)
3.2 L (0.85 US gal) (0.70 Imp.gal)
Engine oil
Lubrication system
Type
Recommended engine oil grade
Wet sump
YAMALUBE 4, SAE 10W30 or SAE 20W40
API service, SG type or higher, JASO standard
MA
Engine oil quantity
Total amount
Without oil filter cartridge replacement
With oil filter cartridge replacement
3.83 L (4.05 US qt) (3.37 Imp.qt)
2.90 L (3.07 US qt) (2.55 Imp.qt)
3.10 L (3.28 US qt) (2.73 Imp.qt)
Oil filter
Oil filter type
Formed
Oil pump
Oil pump type
Inner-rotor-to-outer-rotor-tip clearance
Limit
Outer-rotor-to-oil-pump-housing clearance
Limit
Oil-pump-housing-to-inner-and-outer-rotor
clearance
Limit
Bypass valve opening pressure
Trochoid
0.010–0.100 mm (0.0004–0.0039 in)
0.18 mm (0.0071 in)
0.090–0.190 mm (0.0035–0.0074 in)
0.26 mm (0.0102 in)
0.06–0.13 mm (0.0024–0.0051 in)
0.20 mm (0.0079 in)
80.0–120.0 kPa (11.6–17.4 psi) (0.80–1.20
kgf/cm²)
600.0–680.0 kPa (87.0–98.6 psi) (6.00–6.80
kgf/cm²)
Relief valve operating pressure
Cooling system
Radiator capacity (including all routes)
Coolant reservoir capacity (up to the maximum
level mark)
Radiator cap opening pressure
2.76 L (2.92 US qt) (2.43 Imp.qt)
0.25 L (0.26 US qt) (0.22 Imp.qt)
108–137 kPa (15.4–19.5 psi) (1.08–1.37 kgf/
cm²)
Radiator core
Width
Height
Depth
374.0 mm (14.72 in)
257.8 mm (10.15 in)
24.0 mm (0.94 in)
Water pump
Water pump type
Reduction ratio
Single suction centrifugal pump
65/43 × 25/32 (1.181)
Spark plug (s)
2-2
ENGINE SPECIFICATIONS
Manufacturer/model
Spark plug gap
NGK/CR9EK
0.6–0.7 mm (0.024–0.028 in)
Cylinder head
Volume
Warpage limit*
14.00–14.80 cm³ (0.85–0.90 cu.in)
0.10 mm (0.0039 in)
Camshaft
Drive system
Camshaft cap inside diameter
Camshaft journal diameter
Camshaft-journal-to-camshaft-cap clearance
Chain drive (right)
24.500–24.521 mm (0.9646–0.9654 in)
24.459–24.472 mm (0.9630–0.9635 in)
0.028–0.062 mm (0.0011–0.0024 in)
Camshaft lobe dimensions
Intake A
Limit
Intake B
Limit
Exhaust A
Limit
Exhaust B
Limit
34.450–34.550 mm (1.3563–1.3602 in)
34.350 mm (1.3524 in)
25.170–25.270 mm (0.9909–0.9949 in)
25.070 mm (0.9870 in)
33.550–33.650 mm (1.3209–1.3248 in)
33.450 mm (1.3169 in)
25.192–25.292 mm (0.9918–0.9957 in)
25.092 mm (0.9879 in)
Camshaft runout limit
0.030 mm (0.0012 in)
Timing chain
Model/number of links
Tensioning system
RH2020/124
Automatic
Valve clearance (cold)
Intake
Exhaust
0.11–0.20 mm (0.0043–0.0079 in)
0.26–0.30 mm (0.0102–0.0118 in)
Valve dimensions
Valve head diameter A (intake)
Valve head diameter A (exhaust)
30.90–31.10 mm (1.2165–1.2244 in)
24.90–25.10 mm (0.9803–0.9882 in)
2-3
ENGINE SPECIFICATIONS
Valve face width B (intake)
Valve face width B (exhaust)
1.200–2.480 mm (0.0472–0.0976 in)
1.625–2.900 mm (0.0640–0.1142 in)
Valve seat width C (intake)
Valve seat width C (exhaust)
0.90–1.10 mm (0.0354–0.0433 in)
0.90–1.10 mm (0.0354–0.0433 in)
Valve margin thickness D (intake)
Valve margin thickness D (exhaust)
1.10–1.50 mm (0.0433–0.0591 in)
0.50–0.90 mm (0.0197–0.0354 in)
Valve stem diameter (intake)
Limit
Valve stem diameter (exhaust)
Limit
Valve guide inside diameter (intake)
Limit
Valve guide inside diameter (exhaust)
Limit
Valve-stem-to-valve-guide clearance (intake)
Limit
Valve-stem-to-valve-guide clearance (exhaust)
Limit
Valve stem runout
4.975–4.990 mm (0.1959–0.1965 in)
4.960 mm (0.1953 in)
4.460–4.475 mm (0.1756–0.1762 in)
4.425 mm (0.1742 in)
5.000–5.012 mm (0.1969–0.1973 in)
5.050 mm (0.1988 in)
4.500–4.512 mm (0.1772–0.1776 in)
4.550 mm (0.1791 in)
0.010–0.037 mm (0.0004–0.0015 in)
0.080 mm (0.0032 in)
0.025–0.052 mm (0.0010–0.0020 in)
0.100 mm (0.0039 in)
0.010 mm (0.0004 in)
Cylinder head valve seat width (intake)
Cylinder head valve seat width (exhaust)
0.90–1.10 mm (0.0354–0.0433 in)
0.90–1.10 mm (0.0354–0.0433 in)
2-4
ENGINE SPECIFICATIONS
Valve spring
Inner spring
Free length (intake)
Free length (exhaust)
Installed length (intake)
Installed length (exhaust)
Spring rate K1 (intake)
Spring rate K2 (intake)
Spring rate K1 (exhaust)
Spring rate K2 (exhaust)
Installed compression spring force (intake)
Spring tilt (intake)*
Spring tilt (exhaust)*
39.79 mm (1.57 in)
38.42 mm (1.51 in)
35.50 mm (1.40 in)
33.00 mm (1.30 in)
42.91 N/mm (245.02 lb/in) (4.38 kgf/mm)
56.23 N/mm (321.07 lb/in) (5.73 kgf/mm)
40.10 N/mm (228.97 lb/in) (4.09 kgf/mm)
51.85 N/mm (296.06 lb/in) (5.29 kgf/mm)
171–197 N (38.44–44.29 lbf) (17.44–20.09
kgf) at 35.50 mm (1.398 in)
202–232 N (45.41–52.15 lbf) (20.60–23.66
kgf) at 33.00 mm (1.299 in)
2.5 °/1.7 mm
2.5 °/1.7 mm
Winding direction (intake)
Winding direction (exhaust)
Clockwise
Clockwise
Installed compression spring force (exhaust)
Cylinder
Bore
Taper limit
Out of round limit
77.000–77.010 mm (3.0315–3.0319 in)
0.050 mm (0.0020 in)
0.050 mm (0.0020 in)
Piston
Piston-to-cylinder clearance
Limit
Diameter D
Height H
0.010–0.035 mm (0.0004–0.0014 in)
0.12 mm (0.0047 in)
76.975–76.990 mm (3.0305–3.0311 in)
12.0 mm (0.47 in)
Offset
Offset direction
Piston pin bore inside diameter
Piston pin outside diameter
0.50 mm (0.0197 in)
Intake side
17.002–17.013 mm (0.6694–0.6698 in)
16.991–17.000 mm (0.6689–0.6693 in)
Piston ring
Top ring
Ring type
Dimensions (B × T)
Barrel
0.90 × 2.75 mm (0.04 × 0.11 in)
2-5
ENGINE SPECIFICATIONS
End gap (installed)
Ring side clearance
2nd ring
Ring type
Dimensions (B × T)
0.15–0.25 mm (0.0059–0.0098 in)
0.030–0.065 mm (0.0012–0.0026 in)
Taper
0.80 × 2.75 mm (0.03 × 0.11 in)
End gap (installed)
Ring side clearance
Oil ring
Dimensions (B × T)
0.30–0.45 mm (0.0118–0.0177 in)
0.020–0.055 mm (0.0008–0.0022 in)
1.50 × 2.25 mm (0.06 × 0.09 in)
End gap (installed)
0.10–0.40 mm (0.0039–0.0157 in)
Connecting rod
Oil clearance (using plastigauge®)
Bearing color code
0.034–0.058 mm (0.0013–0.0023 in)
1.Blue 2.Black 3.Brown 4.Green
Crankshaft
Width A
Width B
Runout limit C
Big end side clearance D
55.20–56.60 mm (2.173–2.228 in)
298.75–300.65 mm (11.76–11.84 in)
0.030 mm (0.0012 in)
0.160–0.262 mm (0.0063–0.0103 in)
Journal oil clearance (using plastigauge®)
Bearing color code
0.014–0.037 mm (0.0006–0.0015 in)
0.White 1.Blue 2.Black 3.Brown 4.Green
Clutch
Clutch type
Clutch release method
Clutch lever free play
Friction plate thickness
Wear limit
Plate quantity
Clutch plate thickness
Plate quantity
Warpage limit
Clutch spring free length
Spring quantity
Wet, multiple-disc
Outer pull, rack and pinion pull
10.0–15.0 mm (0.39–0.59 in)
2.90–3.10 mm (0.114–0.122 in)
2.80 mm (0.1102 in)
9 pcs
1.90–2.10 mm (0.075–0.083 in)
8 pcs
0.10 mm (0.0039 in)
43.80 mm (1.72 in)
6 pcs
Transmission
Transmission type
Primary reduction system
Primary reduction ratio
Secondary reduction system
Constant mesh 6-speed
Spur gear
65/43 (1.512)
Chain drive
2-6
ENGINE SPECIFICATIONS
Secondary reduction ratio
Operation
45/17 (2.647)
Left foot operation
Gear ratio
1st
2nd
3rd
4th
5th
6th
Main axle runout limit
Drive axle runout limit
38/15 (2.533)
33/16 (2.063)
37/21 (1.762)
35/23 (1.522)
30/22 (1.364)
33/26 (1.269)
0.08 mm (0.0032 in)
0.08 mm (0.0032 in)
Shifting mechanism
Shift mechanism type
Shift fork guide bar bending limit
Shift fork thickness
Shift drum and guide bar
0.100 mm (0.0039 in)
5.80–5.88 mm (0.2283–0.2315 in)
Air filter
Air filter element
Oil-coated paper element
Fuel pump
Pump type
Model/manufacturer
Maximum consumption amperage
Output pressure
Electrical
4C8/DENSO
6.0 A
324.0 kPa (46.1 psi) (3.24 kgf/cm²)
Fuel injector
Model/quantity
Manufacturer
297500-1110/4
DENSO
Throttle body
Type/quantity
Manufacturer
ID mark
45EIDW/1
MIKUNI
4C81 00 (U.S.A.)
4C85 10 (California)
#50
Throttle valve size
Throttle position sensor
Resistance
Output voltage (at idle)
2.0–3.0 kΩ
0.63–0.73 V
Idling condition
Engine idling speed
Intake vacuum
Water temperature
Oil temperature
Throttle cable free play
1150–1250 r/min
22.0 kPa (6.5 inHg) (165 mmHg)
95.0–105.0 °C (203.00–221.00 °F)
80.0–90.0 °C (176.00–194.00 °F)
3.0–5.0 mm (0.12–0.20 in)
2-7
CHASSIS SPECIFICATIONS
EAS20300
CHASSIS SPECIFICATIONS
Chassis
Frame type
Caster angle
Trail
Diamond
24.00 °
102.0 mm (4.02 in)
Front wheel
Wheel type
Rim size
Rim material
Wheel travel
Radial wheel runout limit
Lateral wheel runout limit
Cast wheel
17M/C × MT3.50
Aluminum
120.0 mm (4.72 in)
1.0 mm (0.04 in)
0.5 mm (0.02 in)
Rear wheel
Wheel type
Rim size
Rim material
Wheel travel
Radial wheel runout limit
Lateral wheel runout limit
Cast wheel
17M/C × MT6.00
Aluminum
130.0 mm (5.12 in)
1.0 mm (0.04 in)
0.5 mm (0.02 in)
Front tire
Type
Size
Manufacturer/model
Manufacturer/model
Wear limit (front)
Tubeless
120/70 ZR17M/C (58W)
PIRELLI/DIABLO CORSA E
MICHELIN/Pilot POWER
0.8 mm (0.03 in)
Rear tire
Type
Size
Manufacturer/model
Manufacturer/model
Wear limit (rear)
Tubeless
190/50 ZR17M/C (73W)
PIRELLI/DIABLO CORSA L
MICHELIN/ Pilot POWER
0.8 mm (0.03 in)
Tire air pressure (measured on cold tires)
Loading condition
Front
Rear
Loading condition
Front
Rear
High-speed riding
Front
Rear
0–90 kg (0–198 lb)
250 kPa (36 psi) (2.50 kgf/cm²) (2.50 bar)
290 kPa (42 psi) (2.90 kgf/cm²) (2.90 bar)
90–195 kg (198–430 lb)
250 kPa (36 psi) (2.50 kgf/cm²) (2.50 bar)
290 kPa (42 psi) (2.90 kgf/cm²) (2.90 bar)
250 kPa (36 psi) (2.50 kgf/cm²) (2.50 bar)
290 kPa (42 psi) (2.90 kgf/cm²) (2.90 bar)
Front brake
Type
Operation
Front brake lever free play
Dual disc brake
Right hand operation
2.3–11.5 mm (0.09–0.45 in)
Front disc brake
Disc outside diameter × thickness
Brake disc thickness limit
Brake disc deflection limit
Brake pad lining thickness (inner)
Limit
Brake pad lining thickness (outer)
Limit
310.0 × 5.0 mm (12.20 × 0.20 in)
4.5 mm (0.18 in)
0.10 mm (0.0039 in)
4.5 mm (0.18 in)
0.8 mm (0.03 in)
4.5 mm (0.18 in)
0.8 mm (0.03 in)
2-8
CHASSIS SPECIFICATIONS
Master cylinder inside diameter
Caliper cylinder inside diameter
Recommended fluid
16.00 mm (0.63 in)
24.05 mm × 3 (0.95 in × 3)
DOT 4
Rear brake
Type
Operation
Brake pedal free play
Single disc brake
Right foot operation
4.3–9.3 mm (0.17–0.37 in)
Rear disc brake
Disc outside diameter × thickness
Brake disc thickness limit
Brake disc deflection limit
Brake pad lining thickness (inner)
Limit
Brake pad lining thickness (outer)
Limit
Master cylinder inside diameter
Caliper cylinder inside diameter
Recommended fluid
220.0 × 5.0 mm (8.66 × 0.20 in)
4.5 mm (0.18 in)
0.15 mm (0.0059 in)
6.0 mm (0.24 in)
1.0 mm (0.04 in)
6.0 mm (0.24 in)
1.0 mm (0.04 in)
12.7 mm (0.50 in)
38.18 mm (1.50 in)
DOT 4
Steering
Steering bearing type
Lock to lock angle (left)
Lock to lock angle (right)
Angular bearing
27.0 °
27.0 °
Front suspension
Type
Spring/shock absorber type
Front fork travel
Fork spring free length
Limit
Collar length
Installed length
Spring rate K1
Spring stroke K1
Inner tube outer diameter
Inner tube bending limit
Optional spring available
Recommended oil
Quantity
Level
Telescopic fork
Coil spring/oil damper
120.0 mm (4.72 in)
237.5 mm (9.35 in)
232.8 mm (9.17 in)
100.0 mm (3.94 in)
223.0 mm (8.78 in)
9.07 N/mm (51.79 lb/in) (0.92 kgf/mm)
0.0–120.0 mm (0.00–4.72 in)
43.0 mm (1.69 in)
0.2 mm (0.01 in)
No
Suspension oil 01
513.0 cm³ (17.34 US oz) (18.09 Imp.oz)
101.0 mm (3.98 in)
Rear suspension
Type
Spring/shock absorber type
Rear shock absorber assembly travel
Spring free length
Installed length
Spring rate K1
Spring stroke K1
Optional spring available
Enclosed gas/air pressure (STD)
Swingarm (link suspension)
Coil spring/gas-oil damper
65.0 mm (2.56 in)
179.5 mm (7.07 in)
166.5 mm (6.56 in)
93.00 N/mm (531.03 lb/in) (9.48 kgf/mm)
0.0–65.0 mm (0.00–2.56 in)
No
1200 kPa (170.7 psi) (12.0 kgf/cm²)
Drive chain
Type/manufacturer
Link quantity
Drive chain slack
15-link length limit
50VA8/DAIDO
118
30.0–40.0 mm (1.18–1.57 in)
239.3 mm (9.42 in)
2-9
ELECTRICAL SPECIFICATIONS
EAS20310
ELECTRICAL SPECIFICATIONS
Voltage
System voltage
12 V
Ignition system
Ignition system
Ignition timing (B.T.D.C.)
Transistorized coil ignition (digital)
5.0 °/1050 r/min
Engine control unit
Model/manufacturer
TBDF42/DENSO
Ignition coil
Model/manufacturer
Minimum ignition spark gap
Primary coil resistance
Secondary coil resistance
F6T568/MITSUBISHI
6.0 mm (0.24 in)
0.85–1.15 Ω at 20 °C (68 °F)
5.02–6.79 kΩ at 20 °C (68 °F)
AC magneto
Model/manufacturer
Standard output
Stator coil resistance
F4T850/MITSUBISHI
14.0 V40.0 A5000 r/min
0.14–0.18 Ω at 20 °C (68 °F)
Rectifier/regulator
Regulator type
Model/manufacturer
Regulated voltage (DC)
Rectifier capacity
Withstand voltage
Semi conductor-short circuit
FH012AA/SHINDENGEN
14.2–14.8 V
50.0 A
40.0 V
Battery
Model
Voltage, capacity
Specific gravity
Manufacturer
Ten hour rate amperage
YTZ10S
12 V, 8.6 Ah
1.310
GYM
0.90 A
Headlight
Bulb type
Halogen bulb
Bulb voltage, wattage × quantity
Headlight
Auxiliary light
Tail/brake light
Front turn signal/position light
Rear turn signal light
License plate light
Meter lighting
12 V, 55.0 W × 4
12 V, 5.0 W × 2
LED
12 V, 21.0 W/5.0 W × 2
12 V, 21.0 W × 2
12 V, 5.0 W × 1
LED
Indicator light
Neutral indicator light
Turn signal indicator light
Oil level warning light
High beam indicator light
Fuel level warning light
Coolant temperature warning light
Engine trouble warning light
Shift timing indicator light
LED
LED
LED
LED
LED
LED
LED
LED
Electric starting system
System type
Constant mesh
2-10
ELECTRICAL SPECIFICATIONS
Starter motor
Model/manufacturer
Power output
Armature coil resistance
Brush overall length
Limit
Brush spring force
Commutator diameter
Limit
Mica undercut (depth)
5VY/YAMAHA
0.90 kW
0.0090–0.0110 Ω
10.8 mm (0.43 in)
7.19 mm (0.28 in)
5.28–7.92 N (19.01–28.51 oz) (538–808 gf)
24.5 mm (0.96 in)
23.5 mm (0.93 in)
1.50 mm (0.06 in)
Starter relay
Model/manufacturer
Amperage
Coil resistance
2768093-A/JIDECO
180.0 A
4.18–4.62 Ω
Horn
Horn type
Quantity
Model/manufacturer
Maximum amperage
Coil resistance
Performance
Plane
1 pcs
YF-12/NIKKO
3.0 A
1.15–1.25 Ω
105–113 dB/2m
Turn signal relay
Relay type
Model/manufacturer
Built-in, self-canceling device
Turn signal blinking frequency
Wattage
Full transistor
FE246BS/DENSO
No
75.0–95.0 cycles/min
21 W × 2.0 +3.4 W
Oil level gauge
Model/manufacturer
5VY/SOMIC ISHIKAWA
Servo motor
Model/manufacturer
5VY/YAMAHA
Fuses
Main fuse
Headlight fuse
Signaling system fuse
Ignition fuse
Radiator fan fuse
Backup fuse
Electric throttle valve fuse
Reserve fuse
Reserve fuse
Reserve fuse
50.0 A
25.0 A
7.5 A
15.0 A
15.0 A × 2
7.5 A
7.5 A
25.0 A
15.0 A
7.5 A
2-11
TIGHTENING TORQUES
EAS20320
TIGHTENING TORQUES
EAS20330
GENERAL TIGHTENING TORQUE SPECIFICATIONS
This chart specifies tightening torques for standard fasteners with a standard ISO thread
pitch. Tightening torque specifications for special components or assemblies are provided
for each chapter of this manual. To avoid
warpage, tighten multi-fastener assemblies in
a crisscross pattern and progressive stages
until the specified tightening torque is reached.
Unless otherwise specified, tightening torque
specifications require clean, dry threads. Components should be at room temperature.
A. Distance between flats
B. Outside thread diameter
A (nut) B (bolt)
10 mm
12 mm
14 mm
17 mm
19 mm
22 mm
6 mm
8 mm
10 mm
12 mm
14 mm
16 mm
General tightening
torques
Nm
m·kg
ft·lb
6
0.6
4.3
15
1.5
11
30
3.0
22
55
5.5
40
85
8.5
61
130
13.0
94
2-12
TIGHTENING TORQUES
EAS20340
ENGINE TIGHTENING TORQUES
Item
Spark plugs
Cylinder head nut (2pieces)
Cylinder head nut (8pieces)
Cylinder head bolt
Camshaft cap bolt
Cylinder head cover bolt
Cylinder head stud bolt (exhaust
pipe)
Air induction system cap bolt
Camshaft sprocket bolt
Cylinder head and throttle body
clamp
Connecting rod cap bolt (1st)
Connecting rod cap bolt (final)
Generator rotor bolt
Timing chain tensioner bolt
Water pump outlet pipe bolt
Water pump inlet pipe bolt (water
pump side)
Water pump inlet pipe bolt (front
side)
Oil/water pump drive sprocket
bolt
Water pump bolt
Thermostat cover nut
Thermostat inlet pipe bolt
Oil cooler bolt
Engine oil drain bolt
Oil pipe bolt
Oil strainer bolt
Oil delivery pipe bolt
Oil filter union bolt
Oil filter
Oil pan bolt
Air filter case screw
Air filter case and funnel screw
Throttle body and throttle body
joint clamp
Throttle body and funnel bolt
Throttle cable adjusting bolt
Cylinder head and exhaust pipe
nut
Threa
Q’ty
d size
M10
4
M10
2
M10
8
M6
2
M6
20
M6
6
Tightening torque
13 Nm (1.3 m·kg, 9.4 ft·lb)
See NOTE
See NOTE
12 Nm (1.2 m·kg, 8.7 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
12 Nm (1.2 m·kg, 8.7 ft·lb)
Remarks
E
E
E
M8
8
15 Nm (1.5 m·kg, 11 ft·lb)
M6
M7
4
4
10 Nm (1.0 m·kg, 7.2 ft·lb)
24 Nm (2.4 m·kg, 17 ft·lb)
M6
7
10 Nm (1.0 m·kg, 7.2 ft·lb)
M8
M8
M10
M6
M6
8
8
1
2
1
20 Nm (2.0 m·kg, 14 ft·lb)
specified angle 150°
60 Nm (6.0 m·kg, 43 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
LT
M6
1
10 Nm (1.0 m·kg, 7.2 ft·lb)
LT
M6
1
10 Nm (1.0 m·kg, 7.2 ft·lb)
M6
1
15 Nm (1.5 m·kg, 11 ft·lb)
M6
M6
M6
M20
M14
M6
M6
M6
M20
M20
M6
M5
M5
2
2
1
1
1
2
3
3
1
1
14
9
2
12 Nm (1.2 m·kg, 8.7 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
63 Nm (6.3 m·kg, 46 ft·lb)
43 Nm (4.3 m·kg, 31 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
70 Nm (7.0 m·kg, 51 ft·lb)
17 Nm (1.7 m·kg, 12 ft·lb)
12 Nm (1.2 m·kg, 8.7 ft·lb)
2.0 Nm (0.2 m·kg, 1.4 ft·lb)
2.5 Nm (0.25 m·kg, 1.8 ft·lb)
M5
4
3.0 Nm (0.3 m·kg, 2.2 ft·lb)
M6
M5
6
2
6.0 Nm (0.6 m·kg, 4.3 ft·lb)
4.0 Nm (0.4 m·kg, 2.9 ft·lb)
M8
8
20 Nm (2.0 m·kg, 14 ft·lb)
2-13
LT
M
M
E
LT
LT
E
LT
LT
LT
E
TIGHTENING TORQUES
Item
Exhaust pipe and muffler bolt
Exhaust pipe and EXUP valve
bolt
Exhaust valve pipe bracket bolt
EXUP pulley and shaft arm nut
EXUP valve pulley cover bolt
EXUP valve and EXUP valve pipe
bolt
EXUP cable bracket bolt
EXUP cable nut
EXUP servo motor cover bolt
EXUP servo motor bolt
Catalyst pipe bracket and rear
frame
Catalyst pipe and EXUP valve
pipe bolt
Catalyst pipe and catalyst pipe
bracket bolt
Catalyst pipe protector
Muffler and rear frame bolt
Muffler protector bolt
Crankcase stud bolt
Crankcase bolt (main journal)
Crankcase bolt
Crankcase bolt
Crankcase bolt
Threa
Q’ty
d size
M8
2
Tightening torque
Remarks
20 Nm (2.0 m·kg, 14 ft·lb)
M6
5
12 Nm (1.2 m·kg, 8.7 ft·lb)
M8
M6
M6
1
1
2
20 Nm (2.0 m·kg, 14 ft·lb)
6.5 Nm (0.65 m·kg, 4.7 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
M6
1
10 Nm (1.0 m·kg, 7.2 ft·lb)
M6
M6
M5
M6
1
2
2
2
10 Nm (1.0 m·kg, 7.2 ft·lb)
6.5 Nm (0.65 m·kg, 4.7 ft·lb)
2 Nm (0.2 m·kg, 1.4 ft·lb)
6.0 Nm (0.6 m·kg, 4.3 ft·lb)
M8
1
20 Nm (2.0 m·kg, 14 ft·lb)
M8
1
20 Nm (2.0 m·kg, 14 ft·lb)
M8
1
20 Nm (2.0 m·kg, 14 ft·lb)
M6
M8
M6
M10
M9
M6
M6
4
2
4
10
10
2
8
6.5 Nm (0.65 m·kg, 4.7 ft·lb)
23 Nm (2.3 m·kg, 17 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
8.0 Nm (0.8 m·kg, 5.8 ft·lb)
See NOTE
10 Nm (1.0 m·kg, 7.2 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
M8
1
24 Nm (2.4 m·kg, 17 ft·lb)
E
E
E
E
E
LT
Crankcase bolt
Generator rotor cover bolt
Generator rotor cover bolt
Drive sprocket cover bolt
Crankcase cover bolt
Clutch cover bolt
Clutch cover bolt
Pickup rotor cover bolt
Breather cover bolt
Breather plate bolt
Plate bolt
Plate bolt
Pickup rotor cover blind bolt
Oil level plug
Generator rotor cover plug
Main gallery plug (oil return)
Main gallery plug
M8
M6
M8
M6
M6
M6
M6
M6
M6
M6
M6
M6
M8
M20
M20
M16
M20
5
4
3
3
3
7
1
6
4
3
1
1
1
1
1
3
1
2-14
24 Nm (2.4 m·kg, 17 ft·lb)
12 Nm (1.2 m·kg, 8.7 ft·lb)
22 Nm (2.2 m·kg, 16 ft·lb)
12 Nm (1.2 m·kg, 8.7 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
12 Nm (1.2 m·kg, 8.7 ft·lb)
12 Nm (1.2 m·kg, 8.7 ft·lb)
12 Nm (1.2 m·kg, 8.7 ft·lb)
12 Nm (1.2 m·kg, 8.7 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
12 Nm (1.2 m·kg, 8.7 ft·lb)
12 Nm (1.2 m·kg, 8.7 ft·lb)
15 Nm (1.5 m·kg, 11 ft·lb)
1.5 Nm (0.15 m·kg, 1.1 ft·lb)
8.0 Nm (0.8 m·kg, 5.8 ft·lb)
8.0 Nm (0.8 m·kg, 5.8 ft·lb)
8.0 Nm (0.8 m·kg, 5.8 ft·lb)
E
LT
LT
LT
LT
LT
TIGHTENING TORQUES
Item
Oil return pipe bolt
Oil return plug
AC magneto lead bolt
Stator coil screw
Generator rotor cover screw
Thermostat assembly stay bolt
Starter clutch idler gear bolt
Threa
Q’ty
d size
M6
2
M12
2
M6
1
M6
3
M6
3
M6
2
M6
1
Tightening torque
10 Nm (1.0 m·kg, 7.2 ft·lb)
24 Nm (2.4 m·kg, 17 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
14 Nm (1.4 m·kg, 10 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
Remarks
LT
LT
LT
LT
LT
LT
E
Clutch boss nut
M20
1
115 Nm (11.5 m·kg, 83 ft·lb)
Clutch spring bolt
M6
6
10 Nm (1.0 m·kg, 7.2 ft·lb)
Drive sprocket nut
M22
1
85 Nm (8.5 m·kg, 61 ft·lb)
Bearing plate bolt
Shift bar stopper plate bolt
Stopper screw
M6
M6
M8
3
2
1
12 Nm (1.2 m·kg, 8.7 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
22 Nm (2.2 m·kg, 16 ft·lb)
Use a lock
washer
LT
Shift rod nut
M6
1
6.5 Nm (0.65 m·kg, 4.7 ft·lb)
Shift rod nut
Joint rod bolt
Shift arm bolt
Neutral switch
Coolant temperature sensor
Cylinder identification sensor bolt
Atmospheric pressure sensor
screw
Crankshaft position sensor bolt
Oil level switch bolt
M6
M6
M6
M10
M12
M6
1
1
1
1
1
1
6.5 Nm (0.65 m·kg, 4.7 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
20 Nm (2.0 m·kg, 14 ft·lb)
18 Nm (1.8 m·kg, 13 ft·lb)
8.0 Nm (0.8 m·kg, 5.8 ft·lb)
M5
2
7.0 Nm (0.7 m·kg, 5.0 ft·lb)
M6
M6
1
2
10 Nm (1.0 m·kg, 7.2 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
Use a lock
washer
LT
LT
LT
Left
thread
LT
LT
LT
NOTE:
• Cylinder head nut (2 pieces)
1. First, tighten the bolts to 10 Nm (1.0 m·kg, 7.2 ft·lb) with a torque wrench following the tightening order.
2. Second, tighten the bolts to 25 Nm (2.5 m·kg, 18 ft·lb) with a torque wrench following the tightening order.
3. Third, tighten the bolts to 40 Nm (4.0 m·kg, 29 ft·lb) with a torque wrench following the tightening order.
4. Final, tighten the bolts to 55 Nm (5.5 m·kg, 40 ft·lb) with a torque wrench following the tightening order.
• Cylinder head nut (8 pieces)
1. First, tighten the bolts to 10 Nm (1.0 m·kg, 7.2 ft·lb) with a torque wrench following the tightening order.
2. Second, tighten the bolts to 25 Nm (2.5 m·kg, 18 ft·lb) with a torque wrench following the tightening order.
2-15
TIGHTENING TORQUES
3. Final, tighten the bolts to 40 Nm (4.0 m·kg, 29 ft·lb) with a torque wrench following the tightening order.
• Crankcase bolt (main journal)
1. First, tighten the bolts to approximately 20 Nm (2.0 m·kg, 14 ft·lb) with a torque wrench following the tightening order.
2. Loosen all the bolts one by one following the tightening order and then tighten them to 20 Nm
(2.7 m·kg, 14 ft·lb) again.
3. Retighten the bolts further to reach the specified angle (56-61°).
Cylinder head tightening sequence:
Crankcase tightening sequence:
2-16
TIGHTENING TORQUES
EAS20350
CHASSIS TIGHTENING TORQUES
Item
Upper bracket pinch bolt
Steering stem nut
Handlebar pinch bolt
Handlebar bolt
Cap bolt
Lower ring nut
Lower bracket pinch bolt
Brake master cylinder reservoir
cap screw
Front brake hose union bolt
Front brake master cylinder
holder bolt
Meter assembly and cowling stay
screw
Headlight and cowling stay screw
Front cowling and headlight screw
Side cowling bracket and frame
bolt
Under cowling and engine bolt
Rear view mirror nut
Front cowling and intake air duct
panel screw
Grip end bolt
Horn bracket bolt
Coolant reservoir bolt
Left front engine mounting bolt
Right front engine mounting bolt
Engine mount self locking nut
(upper)
Threa
Q’ty
d size
M8
2
M28
1
M8
2
M6
2
M46
2
M30
2
M8
4
Tightening torque
26 Nm (2.6 m·kg, 19 ft·lb)
113 Nm (11.3 m·kg, 82 ft·lb)
17 Nm (1.7m·kg, 12 ft·lb)
13 Nm (1.3 m·kg, 9.4 ft·lb)
23 Nm (2.3 m·kg, 17 ft·lb)
See NOTE
23 Nm (2.3 m·kg, 17 ft·lb)
M4
1
1.2 Nm (0.12 m·kg, 0.9 ft·lb)
M10
3
30 Nm (3.0 m·kg, 22 ft·lb)
M6
2
13 Nm (1.3 m·kg, 9.4 ft·lb)
–
3
1.3 Nm (0.13 m·kg, 0.9 ft·lb)
–
–
6
5
0.8 Nm (0.08 m·kg, 0.6 ft·lb)
1.5 Nm (0.15 m·kg, 1.1 ft·lb)
M6
2
5.0 Nm (0.5 m·kg, 3.6 ft·lb)
M6
M6
3
4
5.0 Nm (0.5 m·kg, 3.6 ft·lb)
7.0 Nm (0.7 m·kg, 5.1 ft·lb)
M5
2
1.3 Nm (0.13 m·kg, 0.9 ft·lb)
M6
M6
M6
M10
M10
2
2
2
1
1
4.0 Nm (0.4 m·kg, 2.9 ft·lb)
11 Nm (1.1 m·kg, 8.0 ft·lb)
5.0 Nm (0.5 m·kg, 3.6 ft·lb)
45 Nm (4.5 m·kg, 33 ft·lb)
45 Nm (4.5 m·kg, 33 ft·lb)
M10
1
Remarks
51 Nm (5.1 m·kg, 37 ft·lb)
See
NOTE
E
Engine mount self locking nut
(lower)
M10
1
51 Nm (5.1 m·kg, 37 ft·lb)
See
NOTE
E
Engine mounting adjust bolt
(upper)
Engine mounting adjust bolt
(lower)
Clutch cable locknut (engine side)
Main frame and rear frame bolt
M16
1
7.0 Nm (0.7 m·kg, 5.1 ft·lb)
M16
1
7.0 Nm (0.7 m·kg, 5.1 ft·lb)
M8
1
7.0 Nm (0.7 m·kg, 5.1 ft·lb)
M10
4
41 Nm (4.1 m·kg, 30 ft·lb)
See
NOTE
See
NOTE
See
NOTE
LT
Pivot shaft
Pivot shaft ring nut
Pivot shaft nut
M30
M30
M20
1
1
1
2-17
7.0 Nm (0.7 m·kg, 5.1 ft·lb)
65 Nm (6.5 m·kg, 47 ft·lb)
105 Nm (10.5 m·kg, 76 ft·lb)
LS
TIGHTENING TORQUES
Item
Connecting arm nut (connecting
arm and frame)
Relay arm nut (relay arm and
connecting arm)
Relay arm nut (relay arm and
swingarm)
Rear shock absorber assembly
lower nut
Rear shock absorber upper
bracket nut
Rear shock absorber assembly
upper nut
Drive chain guard bolt
Drive chain guide bolt
Drive chain adjusting locknut
Fuel pump bolt
Fuel tank bolt (front)
Fuel tank bracket bolt
Fuel tank bolt (rear)
Fuel tank side cover screw
Rider seat bolt
Seat lock assembly bolt
Upper tail cover bolt
Battery box bolt
Lean angle sensor bolt
Footrest bracket bolt
Rear brake master cylinder bolt
Rear brake hose union bolt
Sidestand and bracket nut
Sidestand bracket and frame bolt
Front wheel axle bolt
Rear wheel axle nut
Front brake caliper bolt
Front brake disc bolt
Rear brake disc bolt
Rear wheel sprocket nut
Brake caliper bleed screw
Front wheel axle pinch bolt
Threa
Q’ty
d size
Tightening torque
M10
1
44 Nm (4.4 m·kg, 32 ft·lb)
M10
1
44 Nm (4.4 m·kg, 32 ft·lb)
M10
1
44 Nm (4.4 m·kg, 32 ft·lb)
M10
1
44 Nm (4.4 m·kg, 32 ft·lb)
M10
1
44 Nm (4.4 m·kg, 32 ft·lb)
M10
1
92 Nm (9.2 m·kg, 67 ft·lb)
M6
M6
M8
M5
M6
M6
M6
M5
M6
M6
M5
M6
M4
M8
M8
M10
M10
M10
M14
M24
M10
M6
M8
M10
M8
2
1
2
6
1
2
4
2
2
2
1
2
2
4
2
2
1
2
1
1
4
10
5
6
3
7.0 Nm (0.7 m·kg, 5.1 ft·lb)
13 Nm (1.3 m·kg, 9.4 ft·lb)
16 Nm (1.6 m·kg, 12 ft·lb)
4.0 Nm (0.4 m·kg, 2.9 ft·lb)
7.0 Nm (0.7 m·kg, 5.1 ft·lb)
7.0 Nm (0.7 m·kg, 5.1 ft·lb)
7.0 Nm (0.7 m·kg, 5.1 ft·lb)
4.0 Nm (0.4 m·kg, 2.9 ft·lb)
7.0 Nm (0.7 m·kg, 5.1 ft·lb)
10 Nm (1.0 m·kg, 7.2 ft·lb)
4.0 Nm (0.4 m·kg, 2.9 ft·lb)
7.0 Nm (0.7 m·kg, 5.1 ft·lb)
2.0 Nm (0.2 m·kg, 1.4 ft·lb)
28 Nm (2.8 m·kg, 20 ft·lb)
23 Nm (2.3 m·kg, 17 ft·lb)
30 Nm (3.0 m·kg, 22 ft·lb)
61 Nm (6.1 m·kg, 44 ft·lb)
63 Nm (6.3 m·kg, 46 ft·lb)
91 Nm (9.1 m·kg, 66 ft·lb)
150 Nm (15.0 m·kg, 108 ft·lb)
35 Nm (3.5 m·kg, 25 ft·lb)
18 Nm (1.8 m·kg, 13 ft·lb)
30 Nm (3.0 m·kg, 22 ft·lb)
100 Nm (10.0 m·kg, 72 ft·lb)
6.0 Nm (0.6 m·kg, 4.3 ft·lb)
M8
4
21 Nm (2.1 m·kg, 15 ft·lb)
Remarks
LT
LT
LT
LT
See
NOTE
NOTE:
• Lower ring nut
1. First, tighten the lower ring nut approximately 52 Nm (5.2 m·kg, 38 ft·lb) by using the torque
wrench, then loosen the ring nut completely.
2. Retighten the lower ring nut 18 Nm (1.8 m·kg, 13 ft·lb).
2-18
TIGHTENING TORQUES
• Engine mounting adjust bolt and engine mount self locking nut
Refer to "INSTALLING THE ENGINE" on page 5-7.
• Front wheel axle pinch bolt
1. Insert the front wheel axle from the right side and tighten it with the flange bolt from the left
side to 91 Nm (9.1 m·kg, 65.8 ft·lb).
2. In the order from the pinch bolt “2” → pinch bolt “1” → pinch bolt “2”, tighten each bolt to 21 Nm
(2.1 m·kg, 15 ft·lb) without performing temporary tightening.
3. Check that the end face of the axle head and the end face of the fork side are flush-mounted.
If they are out of alignment, make sure to fit them by adding the external force by hand or with
a plastic hammer, etc.
If the end face of the axle is not parallel to the end face of the fork, align them so that one point
of the axle circumference is positioned on the end face of the fork.
At this stage, it can be accepted if the end face of the axle becomes partially concave to the
end face of the fork.
4. In the order from the pinch bolt “4” → pinch bolt “3” → pinch bolt “4”, tighten each bolt to 21 Nm
(2.1 m·kg, 15 ft·lb) without performing temporary tightening.
• Main frame and rear frame bolt
1. Check the clearance between rear frame and main frame by thickness gauge “1”.
Insert adjusting shim(s) to eliminate the gap according to the chart as shown below.
Thickness
Under 0.5 mm
(Under 0.01969 in)
0.51–1.0 mm
(0.02008–0.03937 in)
1.01–1.5 mm
(0.03976–0.05906 in)
1.51–2.0 mm
(0.05945–0.07874 in)
2.01–2.5 mm
(0.07913–0.09843 in)
2.51–3.0 mm
(0.09882–0.11811 in)
Shim(s)
NONE
One shim on the left side
Two shims on the left side
Three shims on the left side
Three shims on the left side and one shim on the right side
Three shims on the left side and two shims on the right side
Shim: 0.5 mm (0.02 in)
2-19
LUBRICATION POINTS AND LUBRICANT TYPES
EAS20360
LUBRICATION POINTS AND LUBRICANT TYPES
EAS20370
ENGINE
Lubrication point
Lubricant
Oil seal lips
LS
O-rings
LS
Bearings
Crankshaft pins
Piston surfaces
Piston pins
Connecting rod bolts
Crankshaft journals
Camshaft lobes
Camshaft journals
Valve stems (intake and exhaust)
Valve stem ends (intake and exhaust)
Water pump impeller shaft
Oil pump rotors (inner and outer)
Oil pump housing
Oil strainer
E
E
E
E
M
E
M
M
M
E
E
E
E
E
Clutch (pull rod)
LS
Starter clutch idle gear inner surface
Starter clutch assembly
Primary driven gear
Transmission gears (wheel and pinion)
Main axle and drive axle
Shift drum
Shift forks and shift fork guide bars
E
E
E
M
M
E
E
Cylinder head cover mating surface
Cylinder head cover semicircular
Crankcase mating surface
Crankcase cover mating surface
Generator rotor cover (stator coil assembly lead grommet)
2-20
Yamaha bond No.
1215
Yamaha bond No.
1215
Yamaha bond No.
1215
Yamaha bond No.
1215
Yamaha bond No.
1215
LUBRICATION POINTS AND LUBRICANT TYPES
EAS20380
CHASSIS
Lubrication point
Steering bearings and bearing races (upper and lower)
Lubricant
LS
Throttle grip inner surface
LS
Brake lever pivoting point and metal-to-metal moving parts
LS
Clutch lever pivoting point and metal-to-metal moving parts
LS
Engine mount bolts (rear upper and lower)
LS
Relay arm, connecting rod and rear shock absorber collar
LS
Pivot shaft
LS
Swingarm pivot bearing
LS
Swingarm head pipe end, oil seal and bush
LS
Oil seal (relay arm, connecting arm and rear shock absorber)
LS
Seat lock assembly moving parts
LS
Sidestand pivoting pint and metal-to-metal moving parts
LS
Link and sidestand switch contact point
LS
Sidestand hook and spring
LS
Shift shaft joint
LS
Front wheel oil seal (right and left)
LS
Front axle shaft
LS
Rear wheel oil seal
LS
Rear wheel drive hub oil seal
LS
Rear wheel drive hub mating surface
LS
2-21
LUBRICATION POINTS AND LUBRICANT TYPES
2-22
LUBRICATION SYSTEM CHART AND DIAGRAMS
EAS20390
LUBRICATION SYSTEM CHART AND DIAGRAMS
EAS20400
ENGINE OIL LUBRICATION CHART
2-23
LUBRICATION SYSTEM CHART AND DIAGRAMS
1. Oil strainer
2. Oil pump
3. Relief valve
4. Oil cooler
5. Oil filter
6. Main gallery
7. AC magneto drive gear shower
8. Shift fork (upper)
9. Main axle
10.Mission shower
11.Drive axle
12.AC magneto axle
13.Piston cooler
14.Chain tensioner
15.Intake camshaft
16.Exhaust camshaft
2-24
LUBRICATION SYSTEM CHART AND DIAGRAMS
EAS20410
LUBRICATION DIAGRAMS
2-25
LUBRICATION SYSTEM CHART AND DIAGRAMS
1.
2.
3.
4.
Intake camshaft
Exhaust camshaft
Oil filter cartridge
Oil level switch
2-26
LUBRICATION SYSTEM CHART AND DIAGRAMS
2-27
LUBRICATION SYSTEM CHART AND DIAGRAMS
1.
2.
3.
4.
5.
6.
7.
8.
Intake camshaft
Exhaust camshaft
Crankshaft
Oil cooler
Relief valve
Oil pipe
Oil strainer
Oil pump
2-28
LUBRICATION SYSTEM CHART AND DIAGRAMS
2-29
LUBRICATION SYSTEM CHART AND DIAGRAMS
1.
2.
3.
4.
5.
6.
Oil filter cartridge
Oil level switch
Oil pump
Oil strainer
Oil pipe
Oil cooler
2-30
LUBRICATION SYSTEM CHART AND DIAGRAMS
A-A
A
A
2-31
LUBRICATION SYSTEM CHART AND DIAGRAMS
1. Main axle
2. Oil delivery pipe
3. Drive axle
2-32
LUBRICATION SYSTEM CHART AND DIAGRAMS
2-33
LUBRICATION SYSTEM CHART AND DIAGRAMS
1. Cylinder head
2. Crankshaft
2-34
COOLING SYSTEM DIAGRAMS
EAS20420
COOLING SYSTEM DIAGRAMS
2-35
COOLING SYSTEM DIAGRAMS
1. Water pump
2. Radiator
3. Radiator fan
2-36
COOLING SYSTEM DIAGRAMS
2-37
COOLING SYSTEM DIAGRAMS
1.
2.
3.
4.
Radiator cap
Radiator
Oil cooler
Thermostat
2-38
CABLE ROUTING
EAS20430
CABLE ROUTING
2-39
CABLE ROUTING
1. Ground lead
2. Meter lead
3. Headlight stay
4. Right headlight lead (high beam)
5. Right auxiliary light lead
6. Intake air temperature sensor coupler
7. Headlight lead
8. Left Auxiliary light lead
9. Left headlight lead (high beam)
10.Right console panel
11.Right intake air duct
12.Left intake air duct
13.Left console panel
A. Insert to the rib of the head light.
(Either location of the right and left relays is
acceptable.)
B. The lead should not stretch too much.
Direction of the ground terminal can be
either top side or flip side.
C. Make sure to insert the coupler and boot to
the stay hole.
D. The speedometer lead should not be
strained.
E. To the headlight stay hole
F. Route by the rear side of the vehicle away
from the right auxiliary light lead.
G. Connect after passing over the upper side
of the duct.
H. To the turn signal light
I. Paste the latch of the clamp to be positioned toward the rear side of the vehicle.
J. There should be no slack when clamping.
Point the tip of the clamp (excessive part)
to the front side of the vehicle.
Fasten the headlight lead with a clamp.
K. Clamp the headlight lead.
Cut the tip of the clamp.
L. To the wire harness
M. Route by the rear side of the vehicle away
from the left auxiliary light lead.
N. Feed a lead wire through the U shape cutout of the console panel.
2-40
CABLE ROUTING
2-41
CABLE ROUTING
1. Right handlebar switch lead
2. Clutch cable
3. Main switch lead
4. Left handlebar switch lead
5. Horn lead
6. Horn
7. Throttle cables
8. Brake hose
9. Throttle cable (return side)
10.Throttle cable (pull side)
A. Route the clutch cable so as to get along
the front side of the main switch after passing it through the guide.
B. Pass the main switch lead through the
guide wire.
C. Pass the left handlebar switch lead through
the guide wire.
D. Pass the clutch switch lead through outside
of the left handlebar switch lead.
E. Point the tip of the band (excessive part) to
the left side of the vehicle and cut the surplus section.
F. Clamp the section between 0 and 20 mm
(0 and 0.79 in) from the split of the under
bracket.
G. Clamp the leads inside the front fork of the
vehicle. Point the exit of the horn lead to
the left front fork side.
H. Fit in the clamp from the inner side to the
outer side of the vehicle so that the return
side is positioned upper and the pull side is
lower at the upper side of the vehicle above
the brake hose.
I. 0 to 30 mm (0 to 1.18 in)
J. Route two throttle cables behind the brake
hose, pass between the inside of the under
bracket’s upper side front fork.
K. 20 to 40 mm (0.8 to 1.6 in)
L. Point the tip of the band (excessive part) to
the right side of the vehicle and cut the surplus section.
M. Pass the left handlebar switch lead through
upper side of the steering damper bracket.
N. Cut the clamp tip leaving 2 to 4 mm (0.08
to 0.16 in).
O. Outside of the vehicle.
P. Inside of the vehicle.
2-42
CABLE ROUTING
2-43
CABLE ROUTING
J. Cut the clamp tip leaving 2 to 4 mm (0.08
to 0.16 in).
K. Route the rear brake light switch lead by
the outer side of the vehicle than the O2
sensor lead and push it into the mating surface section of the clutch cover.
L. Point the tip of the clamp (excessive part)
to the lower front side of the vehicle.
Fasten the right handlebar switch lead,
radiator fan motor lead and ignition coil
lead with a clamp.
M. Point the tip of the clamp (excessive part)
to the upper side of the vehicle.
Fasten the right handlebar switch lead,
radiator fan motor lead and ignition coil
lead with a clamp.
N. Pass the right handlebar switch lead and
radiator fan motor lead between the frame
and heat protector.
O. Clamp so that there is no slack at the left
side of the vehicle.
Fasten the air induction system solenoid
lead, cylinder identification sensor lead,
ignition coil lead and air induction system
solenoid hose with a clamp.
P. The coupler for the air induction system
solenoid lead and cylinder identification
sensor lead should be connected above
the ignition coil sub wire harness and it
should not drop on the cylinder head cover
behind the ignition coil.
Q. Clamp the clutch cable so that it is within
this specified clamp (90°).
R. Route the lead to be positioned by the
inner side of the vehicle than the tip of the
clamp (excessive part.)
S. It should not enter the inner side of the
vehicle than the radiator stay guide.
1. Wire harness
2. Crankshaft position sensor lead
3. Bracket
4. Ignition coil lead
5. Right handlebar switch lead
6. Radiator fan motor lead
7. Heat protector
8. Right radiator fan motor lead
9. Coolant reservoir tank
10.Coolant reservoir drain hose
11.Hose clamp
12.O2 sensor lead
13.Rear brake light switch
14.Protector
15.Right intake air duct
16.Right air outlet grille
17.Cover
18.Water hose
19.Clutch cable
20.Radiator stay guide
21.Radiator
A. Clamp it after passing between the frame
and radiator stay.
Align the clamp position with the taping
sections of right handlebar switch lead.
Point the tip of the clamp (excessive part)
to the front side of the vehicle.
Fasten the right handlebar switch lead with
a clamp.
B. Pass the clutch cable through inside of the
water hose.
Route the radiator fan motor lead by the
outside of the clutch cable after routing it
by the inner side of the water hose.
C. Route the coolant reservoir drain hose by
the outside of the water hose after routing
it by the inner side of the radiator cap
mounting section.
D. Check that the radiator fan motor lead is
fixed with the guide of the radiator stay.
E. Clamp so that the clamp top end is set
along with the bottom end of the hose
clamp.
Point the tip of the clamp (excessive part)
to the front side of the vehicle.
Fasten the clutch cable with a clamp.
F. Clamp so that the coolant reservoir drain
hose is positioned at the front side of the
vehicle by aligning the protector end part of
the coolant reservoir drain hose with the
radiator bottom end.
Fasten the clutch cable and coolant reservoir drain hose with a clamp.
G. To the engine
H. Clamp the coolant reservoir drain hose to
the lower side of the vehicle.
Fasten the clutch cable and coolant reservoir drain hose with a clamp.
I. 80 to 100 mm (3.15 to 3.94 in)
2-44
CABLE ROUTING
2-45
CABLE ROUTING
I. Route the sidestand switch lead by the
inside of the water hose and water pipe.
J. Route the oil level switch lead by the inside
of the water hose and water pipe.
K. There should be no exposure of bared conductors due to the displacement of the
tube.
L. Route by the outside of vehicle away from
the water hose.
M. Point the tip of the clamp (excessive part)
to the front inside of the vehicle.
Fasten the wire harness and left radiator
fan motor lead with a clamp.
N. Align the clamp position with the taping
sections of headlight lead.
Point the tip of the clamp (excessive part)
to the rear inside of the stay.
Fasten the headlight lead, intake air temperature sensor lead and wire harness with
a clamp.
O. To the intake air temperature sensor
P. Point the tip of the clamp (excessive part)
to the front inside of the vehicle.
Fasten the wire harness and left radiator
fan motor lead with a clamp.
Q. Align the clamp position with the taping
sections of wire harness
Point the tip of the clamp (excessive part)
to the inside of the vehicle.
Fasten the wire harness and left radiator
fan motor lead with a clamp.
R. Route the water hose so that it is placed at
the outermost position finally after routing
other leads and hoses in the guide.
S. Align the molded part of the fuel tank drain
hose and fuel tank breather hose with the
stay.
T. Can be routed in any order.
1.
2.
3.
4.
5.
6.
7.
8.
Left radiator fan motor lead
Heat protector
Left handlebar switch lead
Main switch lead
Bracket
EXUP servo motor lead
Cover
Fuel tank drain hose and fuel tank breather
hose
9. Water pipe
10.Sidestand switch lead
11.Oil level switch lead
12.AC magneto lead
13.Headlight lead
14.Fuse box stay
15.Fuse box
16.Wire harness
17.Cover
18.Left air outlet grille
19.Left intake air duct
20.Water hose
21.Stay
22.Fuel tank drain hose
23.Fuel tank breather hose
24.Chain case cover
25.Intake air temperature sensor lead
26.Headlight lead and left turn signal light lead
A. Clamp the leads so that they are positioned inner of the vehicle than the washer
position after routing them between the
frame and radiator stay.
Align the clamp position with the taping
sections of leads.
Point the tip of the clamp (excessive part)
to the lower front side of the vehicle.
What the clamp fastens at this stage are
the handlebar switch and main switch
leads.
B. Check that the radiator fan motor lead is
fixed with the guide of the radiator stay.
C. Pass the main switch lead and left handlebar switch lead between the frame and the
heat protector.
D. Point the tip of the clamp (excessive part)
to the lower front side of the vehicle.
Fasten the left handlebar switch lead and
main switch lead with a clamp.
E. Fold back the clamp and secure it after
passing the lead through the clamp.
F. To the EXUP servo motor
G. Pass the fuel tank drain hose and fuel tank
breather hose through the hole of the cover
from the outside of the water pipe after
passing the water hose through first.
Any direction of the hose cut edge can be
accepted
H. 40 to 60mm (1.57 to 2.36 in)
2-46
CABLE ROUTING
2-47
CABLE ROUTING
N. All hoses and leads should be routed over
the vehicle’s upper side above the heat
protector.
O. To the fuel pump
P. To the speed sensor
Q. Clamp the wire harness winding in and
insert it to the frame hole.
R. Install the leads so that the engine ground
lead is positioned lower and the battery
negative lead to be upper.
Install the protrusion of each lead to be
above the vehicle.
S. It should not be positioned on the harness.
T. Route it under the wire harness, speed
sensor lead, O2 sensor lead and rear brake
light switch lead.
U. Point the tip of the clamp (cut the tip of the
clamp leaving 2 to 4 mm (0.08 to 0.16 in).)
to the inside of the vehicle.
Fasten the wire harness, oil level switch
lead and sidestand switch lead with a
clamp.
V. Align the clamp position with the taping
sections
Point the tip of the clamp (cut the tip of the
clamp leaving 2 to 4 mm (0.08 to 0.16 in).)
to the upper side of the vehicle.
Fasten the AC magneto lead with a clamp.
W. Route the AC magneto lead by the outside
of the pulley cover rib.
X. Clamp the wire harness winding in and
insert it to the frame hole.
Y. Pass the AC magneto lead through the
notch hole of the cover 2.
Z. To the throttle cable lever
AA.To the radiator
AB.Clamp the AC magneto lead.
AC.To the throttle position sensor (for throttle
valves)
AD.Route each lead lower than the frame
plate.
Leads should be routed in random order.
Clamp can be inserted in any direction.
AE.Route each lead higher than the frame
plate, pass it to the inside of the vehicle
from the hole.
Leads should be routed in random order.
Clamp can be inserted in any direction.
AF.Pass the sidestand switch lead behind the
canister stay, and through the rear side of
the vehicle.
AG.Pass the oil level switch lead behind the
canister stay, and through the rear side of
the vehicle.
AH.Pass the fuel tank drain hose behind the
canister stay, and through the rear side of
the vehicle.
AI. Pass the wire harness behind the canister
stay, and through the upside of the vehicle.
AJ.For routing the clamp, refer to the canister
section.
1. Throttle cables
2. Rectifier/regulator
3. Rectifier/regulator lead
4. Right air outlet grille
5. Air induction system solenoid hose
6. Intake funnel servo motor lead
7. O2 sensor lead
8. Rear brake light switch lead
9. Crankshaft position sensor lead
10.Engine ground lead
11.Battery negative lead
12.Neutral switch lead
13.Speed sensor lead
14.Oil level switch lead
15.Sidestand switch lead
16.Fuel tank drain hose
17.AC magneto lead
18.Pulley cover rib
19.Atmospheric pressure sensor
20.Left air outlet grille
21.Left radiator fan motor lead
22.Cover 2
23.Wire harness
24.Throttle position sensor (for throttle valves)
lead
25.Atmospheric pressure sensor lead
26.Frame
27.Locating damper
28.Throttle body
A. To the right handlebar switch lead.
B. Pass it so that there is no torsion through
the clamp which inserted to the cover.
C. To the engine
D. Pass the rectifier/regulator lead through
the notch hole of the cover.
E. To the throttle body
F. To the intake funnel servo motor
G. Intake funnel servo motor lead should be
routed by the front and outer side than the
air induction system solenoid hose.
H. Clamp the wire harness winding in and
insert it to the frame hole.
I. After connecting the coupler, make sure to
insert it between the delivery pipe and thermostat.
J. For routing the fuel hoses, refer to the fuel
tank section.
K. To the starter motor
L. To the air filter case
M. Point the tip of the clamp (cut the tip of the
clamp leaving 2 to 4 mm (0.08 to 0.16 in).)
to the inside of the vehicle.
Fasten the wire harness and crankshaft
position sensor lead with a clamp.
2-48
CABLE ROUTING
2-49
CABLE ROUTING
1. Starter relay lead
2. Starter motor lead
3. Battery positive lead
4. Lean angle sensor
5. Turn signal relay
6. Main fuse
7. Turn signal light/license plate light lead
8. Tail/brake light lead
9. Tail/brake light bracket
10.Lower tail cover
11.Seat lock cable
12.Anti safety alarm coupler
13.Starting circuit cut-off relay
14.Battery negative lead
15.Starter relay
16.Rear frame
17.Rear arm bracket
18.Wire harness
19.Battery box 1
20.Battery
21.ECU (engine control unit)
22.Cover
23.Battery box 2
24.License plate light lead
25.Turn signal light lead
26.Mud guard
A. Point the tip of the clamp (excessive part)
to the inner down side of the vehicle and
clamp at the junction of the wire harness.
Fasten the battery negative lead, wire harness and starter motor lead with a clamp.
B. Point the tip of the clamp (excessive part)
to the inside of the vehicle.
Fasten the wire harness with a clamp.
C. Hold down the clamp tips after passing
each lead.
D. Insert the leads to the rear frame hole.
E. Insert the clamp from the vehicle front to
the rear side and fasten each leads, coupler and onionhead to the tail/brake light
bracket, and then point the tip of the clamp
(excessive part) to the lower front side of
the vehicle.
F. It should be set in the rear frame not to be
caught in the sheet bottom or the covers.
G. Pass the battery negative lead through
inside of the battery band.
H. Battery negative lead should not run on the
rear arm bracket.
I. All leads should be positioned lower than
the tail/brake light bracket.
2-50
CABLE ROUTING
2-51
CABLE ROUTING
1. Fuel tank
2. O-ring
3. Fuel hose
4. Fuel tank drain hose
5. Fuel tank breather hose
6. Air filter stay
7. Clip
8. Fuel tank bracket
9. Fuel hose clamp
10.Fuel pump assembly
A. Install the lip of O-ring facing upward.
B. Install the part pointing the white paint part
of the hose to the left side of the vehicle.
C. Point the clip grip to the inside of the vehicle.
D. Fuel piping connector attachment directions. (fuel pump side)
Always use hands to connect/disconnect
the connector without using tool.
E. Insert the connector until the click sound is
heard and check that the connector does
not come off.
Make sure that no foreign matter is caught
in the sealing section.
(It is prohibited to wear the cotton work
gloves or equivalent coverings.)
F. After item “E” mentioned above is finished,
check that the clamp is inserted from the
down side “a”, “b” and “c” sections are perfectly equipped.
G. This part works as a dropout stopper.
H. Fuel piping connector attachment directions. (engine side)
Always use hands to connect/disconnect
the connector without using tool.
I. After Step “H” as above is finished, check
that the connector is completely attached
by sliding the double lock (orange part) “d”
on the connector as shown in the illustration and seeing if it touches firmly or not.
2-52
CABLE ROUTING
For California
2-53
CABLE ROUTING
1. Frame
2. Canister stay
3. Fuel tank drain hose
4. Clip
5. Pipe 3
6. Clamp
7. Rivet
8. Roll over valve assembly
9. Pipe 4
10.Canister hose
11.Canister assembly
12.Bracket
A. Insert the hose until it reaches the R-bottom of the pipe.
B. Install the part pointing the white paint
mark to the front side of the vehicle.
C. Point the clip grip to the upper side of the
vehicle.
D. To the throttle body
E. The knob of the clip can be positioned in
any direction.
F. Install the part pointing the white paint
mark to the left side of the vehicle.
G. Install the part pointing the yellow paint
mark to the left side of the vehicle.
H. Point the clip grip to the down side of the
vehicle.
I. Insert the hose so that its tip of the nipple
does not protrude.
2-54
CABLE ROUTING
2-55
PERIODIC CHECKS AND ADJUSTMENTS
PERIODIC MAINTENANCE .........................................................................3-1
INTRODUCTION ....................................................................................3-1
ENGINE.........................................................................................................3-4
ADJUSTING THE VALVE CLEARANCE ................................................3-4
SYNCHRONIZING THE THROTTLE BODIES .......................................3-7
ADJUSTING THE THROTTLE CABLE FREE PLAY ..............................3-8
CHECKING THE SPARK PLUGS...........................................................3-9
MEASURING THE COMPRESSION PRESSURE ...............................3-10
CHECKING THE ENGINE OIL LEVEL .................................................3-11
CHANGING THE ENGINE OIL.............................................................3-11
MEASURING THE ENGINE OIL PRESSURE .....................................3-13
ADJUSTING THE CLUTCH CABLE FREE PLAY ................................3-14
REPLACING THE AIR FILTER ELEMENT ...........................................3-14
CHECKING THE THROTTLE BODY JOINTS ......................................3-15
CHECKING THE FUEL LINE ...............................................................3-15
CHECKING THE CRANKCASE BREATHER HOSE ............................3-16
CHECKING THE EXHAUST SYSTEM .................................................3-16
ADJUSTING THE EXUP CABLES .......................................................3-17
CHECKING THE EXUP SERVO MOTOR.............................................3-18
CHECKING THE COOLANT LEVEL ....................................................3-18
CHECKING THE COOLING SYSTEM .................................................3-19
CHANGING THE COOLANT ................................................................3-19
CHASSIS ....................................................................................................3-22
ADJUSTING THE FRONT DISC BRAKE .............................................3-22
ADJUSTING THE REAR DISC BRAKE ...............................................3-22
CHECKING THE BRAKE FLUID LEVEL ..............................................3-23
CHECKING THE FRONT BRAKE PADS..............................................3-24
CHECKING THE REAR BRAKE PADS ................................................3-24
CHECKING THE FRONT BRAKE HOSES...........................................3-24
CHECKING THE REAR BRAKE HOSE ...............................................3-24
ADJUSTING THE REAR BRAKE LIGHT SWITCH ..............................3-25
BLEEDING THE HYDRAULIC BRAKE SYSTEM .................................3-25
ADJUSTING THE SHIFT PEDAL .........................................................3-26
ADJUSTING THE DRIVE CHAIN SLACK ............................................3-27
LUBRICATING THE DRIVE CHAIN......................................................3-27
CHECKING AND ADJUSTING THE STEERING HEAD ......................3-28
CHECKING THE FRONT FORK ..........................................................3-29
ADJUSTING THE FRONT FORK LEGS ..............................................3-30
ADJUSTING THE REAR SHOCK ABSORBER ASSEMBLY................3-31
CHECKING THE TIRES .......................................................................3-33
CHECKING THE WHEELS ..................................................................3-35
CHECKING AND LUBRICATING THE CABLES ..................................3-35
LUBRICATING THE LEVERS...............................................................3-35
LUBRICATING THE PEDAL .................................................................3-35
LUBRICATING THE SIDESTAND.........................................................3-35
LUBRICATING THE REAR SUSPENSION ..........................................3-35
3
ELECTRICAL SYSTEM..............................................................................3-36
CHECKING AND CHARGING THE BATTERY.....................................3-36
CHECKING THE FUSES......................................................................3-36
REPLACING THE HEADLIGHT BULBS...............................................3-36
ADJUSTING THE HEADLIGHT BEAMS ..............................................3-37
PERIODIC MAINTENANCE
EAS20450
PERIODIC MAINTENANCE
EAS20460
INTRODUCTION
This chapter includes all information necessary to perform recommended checks and adjustments.
If followed, these preventive maintenance procedures will ensure more reliable vehicle operation, a
longer service life and reduce the need for costly overhaul work. This information applies to vehicles
already in service as well as to new vehicles that are being prepared for sale. All service technicians
should be familiar with this entire chapter.
Periodic maintenance chart for the emission control system
INITIAL
NO.
ITEM
ROUTINE
ODOMETER READINGS
600 mi
4000 mi
8000 mi
12000 mi 16000 mi 20000 mi
(1000 km) (7000 km) (13000 km) (19000 km) (25000 km) (31000 km)
or
or
or
or
or
or
1 month 6 months 12 months 18 months 24 months 30 months
1 * Fuel line
• Check fuel hoses for cracks or
damage.
• Replace if necessary.
√
√
√
√
√
2 * Spark plugs
• Check condition.
• Adjust gap and clean.
• Replace every 8000 mi (13000
km) or 12 months.
√
Replace.
√
Replace.
√
3 * Valve clearance
• Check and adjust valve clearance when engine is cold.
Every 26600 mi (42000 km)
• Check breather hose for
cracks or damage.
• Replace if necessary.
√
√
√
√
√
5 * Fuel injection
• Adjust synchronization.
√
√
√
√
√
6 * Exhaust system
• Check for leakage.
• Tighten if necessary.
• Replace gasket(s) if necessary.
√
√
√
√
√
4 *
Crankcase
breather system
Evaporative emis• Check control system for damsion control sys7 *
age.
tem (For California
• Replace if necessary.
only)
√
√
• Check the air cut-off valve,
reed valve, and hose for damage.
• Replace any damaged parts if
necessary.
√
√
8 *
Air induction system
* Since these items require special tools, data and technical skills, have a Yamaha dealer perform
the service.
General maintenance and lubrication chart
INITIAL
NO.
ITEM
ROUTINE
1 * Air filter element
• Check condition and damage.
• Replace if necessary.
2 * Clutch
• Check operation.
• Adjust or replace cable.
3 * Front brake
• Check operation, fluid level,
and for fluid leakage.
• Replace brake pads if necessary.
ODOMETER READINGS
600 mi
4000 mi
8000 mi
12000 mi 16000 mi 20000 mi
(1000 km) (7000 km) (13000 km) (19000 km) (25000 km) (31000 km)
or
or
or
or
or
or
1 month 6 months 12 months 18 months 24 months 30 months
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
3-1
PERIODIC MAINTENANCE
INITIAL
NO.
ITEM
4 * Rear brake
5 * Brake hoses
ROUTINE
• Check operation, fluid level,
and for fluid leakage.
• Replace brake pads if necessary.
ODOMETER READINGS
600 mi
4000 mi
8000 mi
12000 mi 16000 mi 20000 mi
(1000 km) (7000 km) (13000 km) (19000 km) (25000 km) (31000 km)
or
or
or
or
or
or
1 month 6 months 12 months 18 months 24 months 30 months
√
√
√
• Check for cracks or damage.
• Replace.
√
√
√
√
√
√
√
√
Every 4 years
6 * Wheels
• Check runout and for damage.
• Replace if necessary.
√
√
√
√
√
7 * Tires
• Check tread depth and for
damage.
• Replace if necessary.
• Check air pressure.
• Correct if necessary.
√
√
√
√
√
8 * Wheel bearings
• Check bearings for smooth
operation.
• Replace if necessary.
√
√
√
√
√
Swingarm pivot
9 *
bearings
• Check bearing assemblies for
looseness.
• Moderately repack with lithium
soap-based grease.
10
Drive chain
• Check chain slack, alignment
and condition.
• Adjust and lubricate chain with
a special O-ring chain lubricant
thoroughly.
11 * Steering bearings
• Check bearing assemblies for
looseness.
• Moderately repack with lithium
soap-based grease every
16000 mi (25000 km) or 24
months.
12 * Steering damper
13 * Chassis fasteners
√
Repack.
Every 500 mi (800 km) and after washing the vehicle or riding in the rain
√
√
√
√
Repack.
√
• Check operation and for oil
leakage.
√
√
√
√
√
• Check all chassis fitting and
fasteners.
• Correct if necessary.
√
√
√
√
√
14
Brake and clutch
lever pivot shafts
• Apply lithium-soap-based
grease (all-purpose grease)
lightly.
√
√
√
√
√
15
Shift pedal rod
pivots
• Apply lithium-soap-based
grease (all-purpose grease)
lightly.
√
√
√
√
√
Sidestand pivot
• Check operation.
• Apply lithium-soap-based
grease (all-purpose grease)
lightly.
√
√
√
√
√
√
√
√
√
√
16
17 * Sidestand switch
• Check operation and replace if
necessary.
18 * Front fork
• Check operation and for oil
leakage.
• Replace if necessary.
√
√
√
√
√
• Check operation and for oil
leakage.
• Replace if necessary.
√
√
√
√
√
19 *
Shock absorber
assembly
20 *
Rear suspension
link pivots
21
Engine oil
22 *
Engine oil filter
cartridge
• Check operation.
• Correct if necessary.
• Change (warm engine before
draining).
• Replace.
√
√
√
√
3-2
√
√
√
√
√
√
√
√
PERIODIC MAINTENANCE
INITIAL
NO.
ITEM
23 * Cooling system
24 * EXUP system
25 *
Front and rear
brake switches
26 * Control cables
ROUTINE
• Check hoses for cracks or
damage.
• Replace if necessary.
√
Lights, signals
and switches
√
√
• Change with ethylene glycol
antifreeze coolant every 24
months.
• Check operation, cable free
play and pulley position.
√
• Check operation.
√
• Apply Yamaha chain and cable
lube or engine oil SAE 10W-30
thoroughly.
√
• Check operation.
• Adjust headlight beam.
√
√
Change.
• Check operation and free play.
• Adjust the throttle cable free
Throttle grip hous27 *
play if necessary.
ing and cable
• Lubricate the throttle grip
housing and cable.
28 *
ODOMETER READINGS
600 mi
4000 mi
8000 mi
12000 mi 16000 mi 20000 mi
(1000 km) (7000 km) (13000 km) (19000 km) (25000 km) (31000 km)
or
or
or
or
or
or
1 month 6 months 12 months 18 months 24 months 30 months
√
√
√
√
√
Every 12000 mi (19000 km)
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
* Since these items require special tools, data and technical skills, have a Yamaha dealer perform
the service.
NOTE:
From 24000 mi (37000 km) or 36 months, repeat the maintenance intervals starting from 8000 mi
(13000 km) or 12 months.
NOTE:
• Air filter
• This model’s air filter is equipped with a disposable oil-coated paper element, which must not be
cleaned with compressed air to avoid damaging it.
• The air filter element needs to be replaced more frequently when riding in unusually wet or dusty
areas.
• Hydraulic brake service
• After disassembling the brake master cylinders and calipers, always change the fluid. Regularly
check the brake fluid levels and fill the reservoirs as required.
• Every two years replace the internal components of the brake master cylinders and calipers, and
change the brake fluid.
• Replace the brake hoses every four years and if cracked or damaged.
3-3
ENGINE
EAS20470
ENGINE
EAS20490
ADJUSTING THE VALVE CLEARANCE
The following procedure applies to all of the
valves.
NOTE:
• Valve clearance adjustment should be made
on a cold engine, at room temperature.
• When the valve clearance is to be measured
or adjusted, the piston must be at top dead
center (TDC) on the compression stroke.
4. Measure:
• Valve clearance
Out of specification → Adjust.
1. Remove:
• Rider seat
Refer to "GENERAL CHASSIS" on page 41.
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Air filter case
Refer to "GENERAL CHASSIS" on page 41.
• Lower cowlings
• Side cowlings
Refer to "GENERAL CHASSIS" on page 41.
• Throttle body assembly
Refer to "THROTTLE BODIES" on page 74.
• Air cut-off valve
Refer to "AIR INDUCTION SYSTEM" on
page 7-9.
• Radiator
• Radiator fan motor
Refer to "RADIATOR" on page 6-1.
2. Remove:
• Ignition coils
• Spark plugs
• Cylinder head cover
• Cylinder head cover gasket
Refer to "CAMSHAFTS" on page 5-9.
3. Remove:
• Pickup rotor cover “1”
Valve clearance (cold)
Intake
0.11–0.20 mm (0.0043–0.0079
in)
Exhaust
0.26–0.30 mm (0.0102–0.0118
in)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the crankshaft counterclockwise.
b. When piston #1 is at TDC on the compression stroke, align the TDC mark “a” on the
generator rotor with the mark “b” on the
crankcase.
NOTE:
TDC on the compression stroke can be found
when the camshaft lobes are turned away from
each other.
c. Measure the valve clearance with a thickness gauge “2”.
NOTE:
• If the valve clearance is incorrect, record the
measured reading.
• Measure the valve clearance in the following
sequence.
3-4
ENGINE
• When removing the timing chain and camshafts, fasten the timing chain with a wire to
retrieve it if it falls into the crankcase.
Valve clearance measuring sequence
Cylinder #1 → #2 → #4 → #3
6. Adjust:
• Valve clearance
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the valve lifter “1” and the valve
pad “2” with a valve lapper “3”.
Valve lapper
90890-04101
Valve lapping tool
YM-A8998
A. Front
NOTE:
d. To measure the valve clearances of the
other cylinders, starting with cylinder #1 at
TDC, turn the crankshaft counterclockwise
as specified in the following table.
• Cover the timing chain opening with a rag to
prevent the valve pad from falling into the
crankcase.
• Make a note of the position of each valve
lifter “1” and valve pad “2” so that they can be
installed in the correct place.
A. Degrees that the crankshaft is turned
counterclockwise
B. Cylinder
C. Combustion cycle
Cylinder #2
Cylinder #4
Cylinder #3
b. Select the proper valve pad from the following table.
180°
360°
540°
Valve pad range
Valve pad thickness
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
5. Remove:
• Camshafts
Available valve pads
NOTE:
• Refer to "CAMSHAFTS" on page 5-9.
3-5
Nos. 156–240
1.56–2.40 mm
(0.0614–0.0945 in)
25 thicknesses in
0.05 mm (0.002 in)
increments
ENGINE
NOTE:
• The thickness “a” of each valve pad is
marked in hundredths of millimeters on the
side that touches the valve lifter.
• Since valve pads of various sizes are originally installed, the valve pad number must be
rounded in order to reach the closest equivalent to the original.
NOTE:
• Lubricate the valve pad with molybdenum
disulfide grease.
• Lubricate the valve lifter with molybdenum
disulfide oil.
• The valve lifter must turn smoothly when
rotated by hand.
• Install the valve lifter and the valve pad in the
correct place.
c. Round off the original valve pad number
according to the following table.
Last digit
0 or 2
5
8
f.
Rounded value
0
5
10
Install the exhaust and intake camshafts,
timing chain and camshaft caps.
Camshaft cap bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
EXAMPLE:
Original valve pad number = 148 (thickness
= 1.48 mm (0.058 in))
Rounded value = 150
d. Locate the rounded number of the original
valve pad and the measured valve clearance in the valve pad selection table. The
point where the column and row intersect is
the new valve pad number.
NOTE:
• Refer to "CAMSHAFTS" on page 5-9.
• Lubricate the camshaft bearings, camshaft
lobes and camshaft journals.
• First, install the exhaust camshaft.
• Align the camshaft marks with the camshaft
cap marks.
• Turn the crankshaft counterclockwise several
full turns to seat the parts.
NOTE:
The new valve pad number is only an approximation. The valve clearance must be measured again and the above steps should be
repeated if the measurement is still incorrect.
g. Measure the valve clearance again.
h. If the valve clearance is still out of specification, repeat all of the valve clearance
adjustment steps until the specified clearance is obtained.
e. Install the new valve pad “1” and the valve
lifter “2”.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
7. Install:
• All removed parts
NOTE:
For installation, reverse the removal procedure. Note the following points.
3-6
ENGINE
5. Install:
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
6. Start the engine and let it warm up for several minutes.
7. Check:
• Engine idling speed
EAS20570
SYNCHRONIZING THE THROTTLE BODIES
NOTE:
Prior to synchronizing the throttle bodies, the
valve clearance should be properly adjusted
and the ignition timing should be checked.
1. Stand the vehicle on a level surface.
Engine idling speed
1150–1250 r/min
NOTE:
Place the vehicle on a suitable stand.
2. Remove:
• Rider seat
Refer to "GENERAL CHASSIS" on page 41.
• Fuel tank side covers
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Air filter case
Refer to "GENERAL CHASSIS" on page 41.
3. Remove:
• Synchronizing hoses “1”
8. Adjust:
• Throttle body synchronization
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
Basic procedure
a. Start the engine, warm it up for several
minutes, and then let it run at the specified
engine idling speed.
Engine idling speed
1150–1250 r/min
b. Turn the bypass air screw “1” with a white
paint mark out a little, and then turn it in
fully.
4. Install:
• Vacuum gauge “1”
(onto the synchronizing hose)
Vacuum gauge
90890-03094
Carburetor synchronizer
YU-44456
c. Using the throttle body that has the bypass
air screw with a white paint mark as the
standard, turn the bypass air screws without white paint marks in or out to the adjust
the other throttle bodies.
3-7
ENGINE
• If an air screw was removed, turn the screw
3/4 turn in and be sure to synchronize the
throttle body.
NOTE:
• If more than one throttle body has a bypass
air screw with a white paint mark, use the
one with the lowest vacuum pressure as the
standard.
• After each step, rev the engine two or three
times, each time for less than a second, and
check the synchronization again.
• If an air screw was removed, turn the screw
3/4 turn in and be sure to synchronize the
throttle body.
Intake vacuum
22.0 kPa (6.5
mmHg)
inHg)
Intake vacuum
22.0 kPa (6.5
mmHg)
inHg)
(165
NOTE:
The difference in vacuum pressure between
two throttle bodies should not exceed 1.33 kPa
(10 mmHg).
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
(165
9. Stop the engine and remove the measuring
equipment.
10. Adjust:
• Throttle cable free play
Refer to "ADJUSTING THE THROTTLE
CABLE FREE PLAY" on page 3-8.
NOTE:
• The difference in vacuum pressure between
two throttle bodies should not exceed 1.33
kPa (10 mmHg).
• If you are unable to adjust the throttle body
synchronization using this procedure, use
the following procedure instead.
Throttle cable free play
3.0–5.0 mm (0.12–0.20 in)
11. Install:
• Fuel tank
• Fuel tank side cover
Refer to "FUEL TANK" on page 7-1.
• Rider seat
Refer to "GENERAL CHASSIS" on page 41.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
Alternate procedure
NOTE:
Use this alternate procedure if you are unable
to adjust the throttle body synchronization
using the basic procedure.
EAS20630
ADJUSTING THE THROTTLE CABLE FREE
PLAY
a. Start the engine, warm it up for several
minutes, and then let it run at the specified
engine idling speed.
NOTE:
Prior to adjusting the throttle cable free play,
the carburetor synchronization should be
adjusted properly.
Engine idling speed
1150–1250 r/min
1. Check:
• Throttle cable free play “a”
Out of specification → Adjust.
b. Turn all of the bypass air screws in fully.
c. Using the throttle body with the lowest vacuum pressure as the standard, turn out the
bypass air screws of the other throttle bodies to adjust them.
NOTE:
• Do not turn out the bypass air screw of the
throttle body with the lowest vacuum pressure.
• After each step, rev the engine two or three
times, each time for less than a second, and
check the synchronization again.
3-8
ENGINE
4. Remove:
• Spark plugs
Throttle cable free play
3.0–5.0 mm (0.12–0.20 in)
ECA13320
CAUTION:
2. Adjust:
• Throttle cable free play
Before removing the spark plugs, blow
away any dirt accumulated in the spark
plug wells with compressed air to prevent it
from falling into the cylinders.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
Handlebar side
a. Loosen the locknut “1”.
b. Turn the adjusting nut “2” in direction “a” or
“b” until the specified throttle cable free
play is obtained.
5. Check:
• Spark plug type
Incorrect → Change.
Manufacturer/model
NGK/CR9EK
Direction “a”
Throttle cable free play is increased.
Direction “b”
Throttle cable free play is decreased.
6. Check:
• Electrode “1”
Damage/wear → Replace the spark plug.
• Insulator “2”
Abnormal color → Replace the spark plug.
Normal color is medium-to-light tan.
7. Clean:
• Spark plugs
(with a spark plug cleaner or wire brush)
8. Measure:
• Spark plug gap “a”
(with a wire thickness gauge)
Out of specification → Regap.
c. Tighten the locknut “1”.
Spark plug gap
0.6–0.7 mm (0.024–0.028 in)
EWA4C81006
WARNING
After adjusting the throttle cable free play,
start the engine and turn the handlebars to
the right and to the left to ensure that this
does not cause the engine idling speed to
change.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS20680
CHECKING THE SPARK PLUGS
The following procedure applies to all of the
spark plugs.
1. Remove:
• Side cowlings
• Lower cowlings
Refer to "GENERAL CHASSIS" on page 41.
2. Remove:
• Radiator upper bolts
• Radiator lower bolt
Refer to "RADIATOR" on page 6-1.
3. Disconnect:
• Ignition coils
9. Install:
• Spark plugs
• Ignition coils
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
NOTE:
Before installing the spark plug, clean the
spark plug and gasket surface.
3-9
ENGINE
10. Install:
• Radiator upper bolts
• Radiator lower bolt
Refer to "RADIATOR" on page 6-1.
11. Install:
• Side cowlings
• Lower cowlings
Refer to "GENERAL CHASSIS" on page 41.
EAS20710
MEASURING THE COMPRESSION PRESSURE
The following procedure applies to all of the
cylinders.
6. Measure:
• Compression pressure
Out of specification → Refer to steps (c)
and (d).
NOTE:
Standard compression pressure (at sea level)
1480 kPa/350 r/min (210.5 psi/
350 r/min) (14.8 kgf/cm²/350 r/
min)
Minimum–Maximum
1290–1660 kPa (183.5–236.1
psi) (12.9–16.6 kgf/cm²)
Insufficient compression pressure will result in
a loss of performance.
1. Measure:
• Valve clearance
Out of specification → Adjust.
Refer to "ADJUSTING THE VALVE
CLEARANCE" on page 3-4.
2. Start the engine, warm it up for several
minutes, and then turn it off.
3. Disconnect:
• Ignition coils
4. Remove:
• Ignition coils
• Spark plugs
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Set the main switch to “ON”.
b. With the throttle wide open, crank the
engine until the reading on the compression gauge stabilizes.
EWA4C81007
WARNING
ECA13340
To prevent sparking, ground all speak plug
leads before cranking the engine.
CAUTION:
Before removing the spark plugs, use compressed air to blow away any dirt accumulated in the spark plug wells to prevent it
from falling into the cylinders.
NOTE:
The difference in compression pressure
between cylinders should not exceed 100 kPa
(1 kg/cm², 14 psi).
5. Install:
• Compression gauge “1”
• Extension
c. If the compression pressure is above the
maximum specification, check the cylinder
head, valve surfaces and piston crown for
carbon deposits.
Carbon deposits → Eliminate.
d. If the compression pressure is below the
minimum specification, pour a teaspoonful
of engine oil into the spark plug bore and
measure again.
Refer to the following table.
Compression gauge
90890-03081
Engine compression tester
YU-33223
Extension
90890-04136
3-10
ENGINE
Compression pressure (with oil applied into
the cylinder)
Reading
Diagnosis
Higher than without
Piston ring(s) wear or
oil
damage → Repair.
Same as without oil
Piston, valves, cylinder head gasket or
piston possibly defective → Repair.
Type
YAMALUBE 4, SAE 10W30 or
SAE 20W40
Recommended engine oil grade
API service, SG type or higher,
JASO standard MA
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
7. Install:
• Spark plugs
• Ignition coils
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
ECA13360
CAUTION:
8. Connect:
• Ignition coils
• Engine oil also lubricates the clutch and
the wrong oil types or additives could
cause clutch slippage. Therefore, do not
add any chemical additives.
• Do not allow foreign materials to enter the
crankcase.
EAS20730
CHECKING THE ENGINE OIL LEVEL
1. Stand the vehicle on a level surface.
NOTE:
• Place the vehicle on a suitable stand.
• Make sure the vehicle is upright.
4. Start the engine, warm it up for several
minutes, and then turn it off.
5. Check the engine oil level again.
2. Start the engine, warm it up for several
minutes, and then turn it off.
3. Check:
• Engine oil level
The engine oil level should be between the
minimum level mark “a” and maximum level
mark “b”.
Below the minimum level mark → Add the
recommended engine oil to the proper
level.
NOTE:
Before checking the engine oil level, wait a few
minutes until the oil has settled.
EAS20790
CHANGING THE ENGINE OIL
1. Start the engine, warm it up for several
minutes, and then turn it off.
2. Place a container under the engine oil drain
bolt.
3. Remove:
• Lower cowlings
Refer to "GENERAL CHASSIS" on page 41.
4. Remove:
• Engine oil filler cap “1”
• Engine oil drain bolt “2”
(along with the gasket)
3-11
ENGINE
c. Tighten the new oil filter cartridge to specification with an oil filter wrench.
Oil filter cartridge
17 Nm (1.7 m·kg, 12 ft·lb)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
7. Check:
• Engine oil drain bolt gasket New
8. Install:
• Engine oil drain bolt
(along with the gasket)
5. Drain:
• Engine oil
(completely from the crankcase)
6. If the oil filter cartridge is also to be
replaced, perform the following procedure.
Engine oil drain bolt
43 Nm (4.3 m·kg, 31 ft·lb)
9. Fill:
• Crankcase
(with the specified amount of the recommended engine oil)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the oil filter cartridge “1” with an oil
filter wrench “2”.
Oil filter wrench
90890-01426
YU-38411
Engine oil quantity
Total amount
3.83 L (4.05 US qt) (3.37
Imp.qt)
Without oil filter cartridge
replacement
2.90 L (3.07 US qt) (2.55
Imp.qt)
With oil filter cartridge replacement
3.10 L (3.28 US qt) (2.73
Imp.qt)
10. Install:
• Engine oil filler cap
• Lower cowlings
Refer to "GENERAL CHASSIS" on page 41.
11. Start the engine, warm it up for several
minutes, and then turn it off.
12. Check:
• Engine
(for engine oil leaks)
b. Lubricate the O-ring “3” of the new oil filter
cartridge with a thin coat of engine oil.
ECA13390
CAUTION:
Make sure the O-ring “3” is positioned correctly in the groove of the oil filter cartridge.
3-12
ENGINE
13. Check:
• Engine oil level
Refer to "CHECKING THE ENGINE OIL
LEVEL" on page 3-11.
Oil pressure gauge set
90890-03153
YU-03153
Oil pressure adapter H
90890-03139
EAS20820
MEASURING THE ENGINE OIL PRESSURE
1. Check:
• Engine oil level
Below the minimum level mark ”a” → Add
the recommended engine oil to the proper
level.
5. Measure:
• Engine oil pressure
(at the following conditions)
Out of specification → Adjust.
Engine oil pressure
230 kPa (2.3 psi) (32.71 kgf/
cm²)
Engine speed
Approx 5000r/min
Oil temperature
80.0–90.0 °C (176.00–194.00
°F)
2. Start the engine, warm it up for several
minutes, and then turn it off.
ECA13410
CAUTION:
When the engine is cold, the engine oil will
have a higher viscosity, causing the engine
oil pressure to increase. Therefore, be sure
to measure the engine oil pressure after
warming up the engine.
Engine oil pressure
Below specification
3. Remove:
• Main gallery bolt “1”
Above specification
•
•
•
•
•
•
•
Possible causes
Faulty oil pump
Clogged oil filter
Leaking oil passage
Broken or damaged
oil seal
Leaking oil passage
Faulty oil filter
Oil viscosity too
high
6. Install:
• Main gallery bolt
Main gallery bolt
8 Nm (0.8 m·kg, 5.8 ft·lb)
EWA12980
WARNING
The engine, muffler and engine oil are
extremely hot.
ECA4C81014
CAUTION:
4. Install:
• Oil pressure gauge “1”
• Adapter “2”
Be careful to tighten too much.
3-13
ENGINE
EAS20870
ADJUSTING THE CLUTCH CABLE FREE
PLAY
1. Check:
• Clutch cable free play “a”
Out of specification → Adjust.
Locknut
7 Nm (0.7 m·kg, 5.1 ft·lb)
c. Tighten the locknuts “1”.
Clutch lever free play
10.0–15.0 mm (0.39–0.59 in)
2. Adjust:
• Clutch cable free play
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
Handlebar side
a. Turn the adjusting bolt “1” in direction “b” or
“c” until the specified clutch cable free play
is obtained.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS20960
Direction “b”
Clutch cable free play is increased.
Direction “c”
Clutch cable free play is decreased.
REPLACING THE AIR FILTER ELEMENT
1. Remove:
• Rider seat
Refer to "GENERAL CHASSIS" on page 41.
• Fuel tank side covers
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
2. Remove:
• Air filter case cover “1”
Refer to "GENERAL CHASSIS" on page 41.
b. Tighten the locknut “1”.
NOTE:
If the specified clutch cable free play cannot be
obtained on the handlebar side of the cable,
use the adjusting nut on the engine side.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Check:
• Air filter element “1”
Damage → Replace.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
Engine side
a. Loosen the locknuts “1”.
b. Turn the adjusting bolt “2” in direction “a” or
“b” until the specified clutch cable free play
is obtained.
NOTE:
The air filter needs more frequent service if
you are riding in unusually wet or dusty areas.
Direction “a”
Clutch cable free play is increased.
Direction “b”
Clutch cable free play is decreased.
3-14
ENGINE
NOTE:
When installing the air filter element into the air
filter case cover, make sure that the sealing
surfaces are aligned to prevent any air leaks.
6. Install:
• Fuel tank
• Fuel tank side covers
Refer to "FUEL TANK" on page 7-1.
• Rider seat
Refer to "GENERAL CHASSIS" on page 41.
4. Install:
• Air filter element
EAS21010
CHECKING THE THROTTLE BODY JOINTS
The following procedure applies to all of the
throttle body joints and intake manifolds.
1. Remove:
• Throttle bodies
Refer to "THROTTLE BODIES" on page 74.
2. Check:
• Throttle body joints “1”
Cracks/damage → Replace.
1. Projection 1
2. Projection 2
3. Slot
NOTE:
Install a new air filter element by fitting the projections 1 on the element into the slots in the
air filter case.
ECA4C81021
CAUTION:
3. Install:
• Throttle bodies
Refer to "THROTTLE BODIES" on page 74.
• Make sure that the air filter element is
properly seated in the air filter case.
• Pay attention to handling of the products
so that the projections is not deformed.
5. Install:
• Air filter case cover
EAS21030
CHECKING THE FUEL LINE
The following procedure applies to all of the
fuel, vacuum and breather hoses.
1. Remove:
• Rider seat
Refer to "GENERAL CHASSIS" on page 41.
• Fuel tank side covers
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
2. Check:
• Fuel hose “1”
• Breather hose “2”
Cracks/damage → Replace.
Loose connection → Connect properly.
ECA4C81015
CAUTION:
Never operate the engine without the air filter element installed. Unfiltered air will
cause rapid wear of engine parts and may
damage the engine. Operating the engine
without the air filter element will also affect
throttle bodies synchronization, leading to
poor engine performance and possible
overheating.
3-15
ENGINE
NOTE:
Before removing the fuel hoses, place a few
rags in the area under where it will be removing.
ECA14940
CAUTION:
Make sure the fuel tank breather hose is
routed correctly.
3. Install:
• Fuel tank
• Fuel tank side covers
Refer to "FUEL TANK" on page 7-1.
• Rider seat
Refer to "GENERAL CHASSIS" on page 41.
ECA4C81016
CAUTION:
To install the fuel tank, check that the
breather hose is not folded or pinched by
the fuel tank.
3. Install:
• Fuel tank
• Fuel tank side covers
Refer to "FUEL TANK" on page 7-1.
• Rider seat
Refer to "GENERAL CHASSIS" on page 41.
EAS21080
CHECKING THE EXHAUST SYSTEM
The following procedure applies to all of the
exhaust pipes and gaskets.
1. Check:
• Exhaust pipe “1”
• Exhaust valve pipe “2”
• Muffler “3”
Cracks/damage → Replace.
• Gasket “4”
Exhaust gas leaks → Replace.
• Catalist pipe “5”
Cracks/damage → Replace.
2. Check:
• Tightening torque
• Exhaust pipe nut “6”
• Exhaust pipe and exhaust valve pipe bolt
“7”
• Exhaust valve pipe and catalist pipe bolt “8”
• Catalist pipe bolt “9”
• Catalist pipe and muffler bolt “10”
• Muffler and frame bolt “11”
ECA4C81016
CAUTION:
To install the fuel tank, check that the
breather hose is not folded or pinched by
the fuel tank.
EAS21070
CHECKING THE CRANKCASE BREATHER
HOSE
1. Remove:
• Rider seat
Refer to "GENERAL CHASSIS" on page 41.
• Fuel tank side covers
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
2. Check:
• Crankcase breather hose “1”
Cracks/damage → Replace.
Loose connection → Connect properly.
ECA13450
CAUTION:
Make sure the crankcase breather hose is
routed correctly.
3-16
ENGINE
EAS21100
Exhaust pipe nut
20 Nm (2.0 m·kg, 14 ft·lb)
Exhaust pipe and exhaust valve
pipe bolt
12 Nm (1.2 m·kg, 8.7 ft·lb)
Exhaust valve pipe and catalist
pipe bolt
20 Nm (2.0 m·kg, 14 ft·lb)
Catalist pipe bolt
20 Nm (2.0 m·kg, 14 ft·lb)
Catalist pipe and muffler bolt
20 Nm (2.0 m·kg, 14 ft·lb)
Muffler and frame bolt
23 Nm (2.3 m·kg, 17 ft·lb)
ADJUSTING THE EXUP CABLES
1. Remove:
• Lower cowlings
Refer to "GENERAL CHASSIS" on page 41.
2. Remove:
• EXUP valve pulley cover “1”
NOTE:
When installing the EXUP cables, make sure
they are parallel and not twisted.
• Upper cable: White metal section “12”
• Lower cable: Black metal section “13”
3. Check:
• EXUP system operation
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the main switch ON
b. Check that the EXUP valve operates properly
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
4. Check:
• EXUP cable free play (at the EXUP valve
pulley) “a”
Maximum EXUP cable free play
(at the EXUP valve pulley)
Less than 3 mm (0.12 in)
5. Adjust:
• EXUP cable free play
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the main switch to “ON”.
b. Check the EXUP pulley position.
c. Projection of the EXUP pulley position is
between “1” and “2” .
d. Loosen the both locknuts “3”
e. Turn the both adjusting nuts “4” in or out.
f. Tighten the both locknuts.
3-17
ENGINE
NOTE:
• Place the vehicle on a suitable stand.
• Make sure the vehicle is upright.
2. Remove:
• Lower cowlings
• Right side cowling
Refer to "GENERAL CHASSIS" on page 41.
3. Check:
• Coolant level
The coolant level should be between the
maximum level mark “a” and minimum level
mark “b”.
Below the minimum level mark → Add the
recommended coolant to the proper level.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
6. Install:
• EXUP valve pulley cover
EXUP valve pulley cover bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
7. Install:
• Lower cowlings
Refer to "GENERAL CHASSIS" on page 41.
EAS28360
CHECKING THE EXUP SERVO MOTOR
1. Check:
• EXUP servo motor operation
Out of specification → Replace.
ECA13470
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
CAUTION:
a. Check whether or not the EXUP valve is
seized.
• Disconnect the EXUP cable and check that
the EXUP valve is moved smoothly by
hand.
• When the valve is not moved smoothly,
repair or replace it.
Refer to "ADJUSTING THE EXUP
CABLES" on page 3-17.
b. When the EXUP valve is moved smoothly,
replace the EXUP servo motor.
c. Perform the self-diagnosis mode and check
the operation of EXUP valve by visual
inspection (Code No: 53).
The operation should be carried out as 3second drive in the full open direction, 2second stop and 3-second drive in the full
close direction.
d. Check that the EXUP servo motor pulley
rotates several times.
• Adding water instead of coolant lowers
the antifreeze content of the coolant. If
water is used instead of coolant check,
and if necessary, correct the antifreeze
concentration of the coolant.
• Use only distilled water. However, if distilled water is not available, soft water
may be used.
4. Start the engine, warm it up for several
minutes, and then turn it off.
5. Check:
• Coolant level
NOTE:
Before checking the coolant level, wait a few
minutes until it settles.
6. Install:
• Right side cowling
• Lower cowlings
Refer to "GENERAL CHASSIS" on page 41.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS21110
CHECKING THE COOLANT LEVEL
1. Stand the vehicle on a level surface.
3-18
ENGINE
• Side cowlings
• Lower cowlings
Refer to "GENERAL CHASSIS" on page 41.
EAS21120
CHECKING THE COOLING SYSTEM
1. Remove:
• Lower cowlings
• Side cowling
Refer to "GENERAL CHASSIS" on page 41.
2. Check:
• Radiator “1”
• Radiator inlet hose “2”
• Radiator outlet hose “3”
• Oil cooler “4”
• Oil cooler inlet hose “5”
• Oil cooler outlet hose “6”
• Water jacket joint “7”
• Water jacket joint inlet hose “8”
• Water pump inlet pipe “9”
• Water pump outlet pipe “10”
Cracks/damage → Replace.
Refer to "RADIATOR" on page 6-1 and
"OIL COOLER" on page 6-4.
EAS21130
CHANGING THE COOLANT
1. Remove:
• Lower cowlings
• Side cowlings
Refer to "GENERAL CHASSIS" on page 41.
2. Remove:
• Coolant reservoir
• Coolant reservoir hose
3. Disconnect:
• Coolant reservoir cap “1”
4. Drain:
• Coolant
(from the coolant reservoir)
5. Remove:
• Radiator cap “2”
EWA13030
WARNING
A hot radiator is under pressure. Therefore,
do not remove the radiator cap when the
engine is hot. Scalding hot fluid and steam
may be blown out, which could cause serious injury. When the engine has cooled,
open the radiator cap as follows:
Place a thick rag or a towel over the radiator cap and slowly turn the radiator cap
counterclockwise toward the detent to
allow any residual pressure to escape.
When the hissing sound has stopped,
press down on the radiator cap and turn it
counterclockwise to remove.
The following procedure applies to all of the
coolant drain bolts and copper washers.
6. Remove:
• Coolant drain bolt (engine) “1”
(along with the copper washer)
3. Install:
3-19
ENGINE
Recommended antifreeze
High-quality ethylene glycol
antifreeze containing corrosion
inhibitors for aluminum engines
Mixing ratio
1:1 (antifreeze:water)
Radiator capacity (including all
routes)
2.76 L (2.92 US qt) (2.43
Imp.qt)
Coolant reservoir capacity (up
to the maximum level mark)
0.25 L (0.26 US qt) (0.22
Imp.qt)
7. Drain:
• Coolant
(from the engine and radiator)
8. Check:
• Copper washer “1” New (coolant drain
bolt “2”)
Handling notes for coolant
Coolant is potentially harmful and should
be handled with special care.
EWA13040
WARNING
• If coolant splashes in your eyes, thoroughly wash them with water and consult
a doctor.
• If coolant splashes on your clothes,
quickly wash it away with water and then
with soap and water.
• If coolant is swallowed, induce vomiting
and get immediate medical attention.
9. Install:
• Coolant drain bolt (with the copper washer)
Coolant drain bolt
7 Nm (0.7 m·Kg, 5.1 ft·lb)
ECA13480
CAUTION:
10. Connect:
• Coolant reservoir hose
11. Install:
• Coolant reservoir
12. Fill:
• Cooling system
(with the specified amount of the recommended coolant)
• Adding water instead of coolant lowers
the antifreeze content of the coolant. If
water is used instead of coolant check,
and if necessary, correct the antifreeze
concentration of the coolant.
• Use only distilled water. However, if distilled water is not available, soft water
may be used.
• If coolant comes into contact with painted
surfaces, immediately wash them with
water.
• Do not mix different types of antifreeze.
13. Install:
• Radiator cap
14. Fill:
• Coolant reservoir
(with the recommended coolant to the maximum level mark “a”)
3-20
ENGINE
15. Install:
• Coolant reservoir cap
16. Start the engine, warm it up for several
minutes, and then stop it.
17. Check:
• Coolant level
Refer to "CHECKING THE COOLANT
LEVEL" on page 3-18.
NOTE:
Before checking the coolant level, wait a few
minutes until the coolant has settled.
18. Install:
• Side cowlings
• Lower cowlings
Refer to "GENERAL CHASSIS" on page 41.
3-21
CHASSIS
(distance “a” from the center of the footrest
bracket bolt to the center of the brake
pedal)
Out of specification → Adjust.
EAS21140
CHASSIS
EAS21160
ADJUSTING THE FRONT DISC BRAKE
1. Adjust:
• Brake lever position
(distance “a” from the throttle grip to the
brake lever)
Brake pedal position
25.2 mm (0.99 in)
NOTE:
While pushing the brake lever forward, turn the
adjusting dial “1” until the brake lever is in the
desired position.
Direction “b”
Distance “a” is the largest.
Direction “c”
Distance “a” is the smallest.
2. Adjust:
• Brake pedal position
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Loosen the locknut “1”.
b. Turn the adjusting bolt “2” in direction “a” or
“b” until the specified brake pedal position
is obtained.
Direction “a”
Brake pedal is raised.
Direction “b”
Brake pedal is lowered.
EWA13060
WARNING
EWA13070
• After adjusting the brake lever position,
make sure the pin on the brake lever
holder is firmly inserted in the hole in the
adjusting dial.
• A soft or spongy feeling in the brake lever
can indicate the presence of air in the
brake system. Before the vehicle is operated, the air must be removed by bleeding
the brake system. Air in the brake system
will considerably reduce in loss of control
and possibly an accident. Therefore,
check and if necessary, bleed the brake
system.
WARNING
After adjusting the brake pedal position,
check that the end of the adjusting bolt “c”
is visible through the hole “d”.
ECA13490
CAUTION:
After adjusting the brake lever position,
make sure there is no brake drag.
c. Tighten the locknut “1” to specification.
Locknut
18 Nm (1.8 m·kg, 13 ft·lb)
EAS21190
ADJUSTING THE REAR DISC BRAKE
1. Check:
• Brake pedal position
3-22
CHASSIS
EWA13050
WARNING
A soft or spongy feeling in the brake lever
can indicate the presence of air in the brake
system. Before the vehicle is operated, the
air must be removed by bleeding the brake
system. Air in the brake system will considerably reduce braking performance.
ECA13510
CAUTION:
After adjusting the brake pedal position,
make sure there is no brake drag.
A. Front brake
B. Rear brake
EWA13090
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
WARNING
3. Adjust:
• Rear brake light switch
Refer to "ADJUSTING THE REAR BRAKE
LIGHT SWITCH" on page 3-25.
• Use only the designated brake fluid.
Other brake fluids may cause the rubber
seals to deteriorate, causing leakage and
poor brake performance.
• Refill with the same type of brake fluid
that is already in the system. Mixing brake
fluids may result in a harmful chemical
reaction, leading to poor brake performance.
EAS21240
CHECKING THE BRAKE FLUID LEVEL
1. Stand the vehicle on a level surface.
NOTE:
• Place the vehicle on a suitable stand.
• Make sure the vehicle is upright.
2. Check:
• Brake fluid level
Below the minimum level mark “a” → Add
the recommended brake fluid to the proper
level.
Recommended fluid
DOT 4
3-23
CHASSIS
• When refilling, be careful that water does
not enter the brake fluid reservoir. Water
will significantly lower the boiling point of
the brake fluid and could cause vapor
lock.
ECA13540
CAUTION:
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean
up any spilt brake fluid immediately.
NOTE:
EAS21280
CHECKING THE FRONT BRAKE HOSES
The following procedure applies to all of the
brake hoses and brake hose clamps.
1. Check:
• Brake hose “1”
Cracks/damage/wear → Replace.
2. Check:
• Brake hose clamp “2”
Loose → Tighten the clamp bolt.
In order to ensure a correct reading of the
brake fluid level, make sure the top of the
brake fluid reservoir is horizontal.
EAS21250
CHECKING THE FRONT BRAKE PADS
The following procedure applies to all of the
brake pads.
1. Operate the brake.
2. Check:
• Front brake pad
Wear indicators “a” almost touch the brake
disc → Replace the brake pads as a set.
Refer to "FRONT BRAKE" on page 4-19.
3. Hold the vehicle upright and apply the
brake several times.
4. Check:
• Brake hose
Brake fluid leakage → Replace the damaged hose.
Refer to "FRONT BRAKE" on page 4-19.
EAS21260
CHECKING THE REAR BRAKE PADS
The following procedure applies to all of the
brake pads.
1. Operate the brake.
2. Check:
• Rear brake pad
Wear indicators “a” almost touch the brake
disc → Replace the brake pads as a set.
Refer to "REAR BRAKE" on page 4-32.
EAS21290
CHECKING THE REAR BRAKE HOSE
1. Check:
• Brake hose “1”
Cracks/damage/wear → Replace.
2. Check:
• Brake hose clamp “2”
Loose Connection → Tighten the clamp
bolt.
3-24
CHASSIS
3. Hold the vehicle upright and apply the front
brake several times.
4. Check:
• Brake hose
Brake fluid leakage → Replace the damaged hose.
Refer to "REAR BRAKE" on page 4-32.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS21360
BLEEDING THE HYDRAULIC BRAKE SYSTEM
EWA13100
WARNING
Bleed the hydraulic brake system whenever:
• The system is disassembled.
• A brake hose is loosened, disconnected
or replaced.
• The brake fluid level is very low.
• Brake operation is faulty.
EAS21330
ADJUSTING THE REAR BRAKE LIGHT
SWITCH
NOTE:
The rear brake light switch is operated by
movement of the brake pedal. The rear brake
light switch is properly adjusted when the
brake light comes on just before the braking
effect starts.
NOTE:
• Be careful not to spill any brake fluid or allow
the brake fluid reservoir to overflow.
• When bleeding the hydraulic brake system,
make sure there is always enough brake fluid
before applying the brake. Ignoring this precaution could allow air to enter the hydraulic
brake system, considerably lengthening the
bleeding procedure.
• If bleeding is difficult, it may be necessary to
let the brake fluid settle for a few hours.
Repeat the bleeding procedure when the tiny
bubbles in the hose have disappeared.
1. Check:
• Rear brake light operation timing
Incorrect → Adjust.
2. Adjust:
• Rear brake light operation timing
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Hold the main body “1” of the rear brake
light switch so that it does not rotate and
turn the adjusting nut “2” in direction “a” or
“b” until the rear brake light comes on at the
proper time.
1. Bleed:
• Hydraulic brake system
Direction “a”
Brake light comes on sooner.
Direction “b”
Brake light comes on later.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Fill the brake fluid reservoir to the proper
level with the recommended brake fluid.
b. Install the brake fluid reservoir diaphragm.
c. Connect a clear plastic hose “1” tightly to
the bleed screw “2”.
3-25
CHASSIS
the throttle grip or the brake pedal to fully
extend.
h. Tighten the bleed screw and then release
the brake lever or brake pedal.
i. Repeat steps (e) to (h) until all of the air
bubbles have disappeared from the brake
fluid in the plastic hose.
j. Tighten the bleed screw to specification.
Bleed screw
6 Nm (0.6 m·kg, 4.3 ft·lb)
k. Fill the brake fluid reservoir to the proper
level with the recommended brake fluid.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-23.
EWA13110
WARNING
After bleeding the hydraulic brake system,
check the brake operation.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS21380
ADJUSTING THE SHIFT PEDAL
1. Adjust:
• Shift pedal position
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Loosen both locknuts “1”.
b. Turn the shift rod “2” in direction “a” or “b” to
obtain the correct shift pedal position.
Direction “a”
Shift pedal is raised.
Direction “b”
Shift pedal is lowered.
A. Front brake master cylinder
B. Front brake caliper
C. Rear brake caliper
NOTE:
Bleeding order of the front hydraulic brake system is the following order:
• Front brake master cylinder
• Front brake calipers
• Front brake master cylinder
d. Place the other end of the hose into a container.
e. Slowly apply the brake several times.
f. Fully pull the brake lever or fully press
down the brake pedal and hold it in position.
g. Loosen the bleed screw.
c. Tighten both locknuts.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
NOTE:
Loosening the bleed screw will release the
pressure and cause the brake lever to contact
3-26
CHASSIS
EAS21410
ADJUSTING THE DRIVE CHAIN SLACK
Direction “a”
Drive chain is tightened.
Direction “b”
Drive chain is loosened.
NOTE:
The drive chain slack must be checked at the
tightest point on the chain.
ECA13550
CAUTION:
A drive chain that is too tight will overload
the engine and other vital parts, and one
that is too loose can skip and damage the
swingarm or cause an accident. Therefore,
keep the drive chain slack within the specified limits.
1. Stand the vehicle on a level surface.
EWA13120
WARNING
Securely support the vehicle so that there
is no danger of it falling over.
NOTE:
NOTE:
To maintain the proper wheel alignment, adjust
both sides evenly.
Place the vehicle on a suitable stand so that
the rear wheel is elevated.
d. Tighten both locknuts to specification.
Locknut
16 Nm (1.6 m·kg, 12 ft·lb)
2. Spin the rear wheel several times and find
the tightest position of drive chain.
3. Check:
• Drive chain slack “a”
Out of specification → Adjust.
e. Tighten the wheel axle nut to specification.
Wheel axle nut
150 Nm (15 m·kg, 108 ft·lb)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS21440
LUBRICATING THE DRIVE CHAIN
The drive chain consists of many interacting
parts. If the drive chain is not maintained properly, it will wear out quickly. Therefore, the drive
chain should be serviced, especially when the
vehicle is used in dusty areas.
This vehicle has a drive chain with small rubber O-rings between each side plate. Steam
cleaning, high-pressure washing, certain solvents, and the use of a coarse brush can damage these O-rings. Therefore, use only
kerosene to clean the drive chain. Wipe the
drive chain dry and thoroughly lubricate it with
engine oil or chain lubricant that is suitable for
O-ring chains. Do not use any other lubricants
on the drive chain since they may contain solvents that could damage the O-rings.
Drive chain slack
30.0–40.0 mm (1.18–1.57 in)
4. Adjust:
• Drive chain slack
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Loosen the wheel axle nut “1”.
b. Loosen both locknuts “2”.
c. Turn both adjusting nuts “3” in direction “a”
or “b” until the specified drive chain slack is
obtained.
3-27
CHASSIS
Recommended lubricant
Engine oil or chain lubricant
suitable for O-ring chains
Steering nut wrench
90890-01403
Spanner wrench
YU-33975
EAS21500
CHECKING AND ADJUSTING THE STEERING HEAD
1. Stand the vehicle on a level surface.
Lower ring nut (initial tightening
torque)
52 Nm (5.2 m·kg, 38 ft·lb)
EWA13120
WARNING
c. Loosen the lower ring nut “4” completely,
then tighten it to specification.
Securely support the vehicle so that there
is no danger of it falling over.
EWA13140
WARNING
NOTE:
Do not overtighten the lower ring nut.
Place the vehicle on a suitable stand so that
the front wheel is elevated.
Lower ring nut (final tightening
torque)
18 Nm (1.8 m·kg, 13 ft·lb)
2. Check:
• Steering head
Grasp the bottom of the front fork legs and
gently rock the front fork.
Binding/looseness → Adjust the steering
head.
3. Remove:
• Upper bracket
Refer to "HANDLEBARS" on page 4-44
and "STEERING HEAD" on page 4-58.
4. Adjust:
• Steering head
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the lock washer “1”, the upper ring
nut “2”, and the rubber washer “3”.
d. Check the steering head for looseness or
binding by turning the front fork all the way
in both directions. If any binding is felt,
remove the lower bracket and check the
upper and lower bearings.
Refer to "STEERING HEAD" on page 4-58.
e. Install the rubber washer “3”.
f. Install the upper ring nut “2”.
g. Finger tighten the upper ring nut “2”, then
align the slots of both ring nuts. If necessary, hold the lower ring nut and tighten the
upper ring nut until their slots are aligned.
h. Install the lock washer “1”.
b. Loosen the lower ring nut “4” and then
tighten it to specification with a steering nut
wrench “5”.
NOTE:
Make sure the lock washer tabs “a” sit correctly
in the ring nut slots “b”.
NOTE:
Set the torque wrench at a right angle to the
steering nut wrench.
3-28
CHASSIS
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
e. Repeat the above procedure on the opposite handlebar.
f. If the steering head tension is out of specification (both handlebars should be within
specification), remove the upper bracket
and loosen or tighten the upper ring nut.
g. Reinstall the upper bracket and measure
the steering head tension again as
described above.
h. Repeat the above procedure until the steering head tension is within specification.
i. Grasp the bottom of the front fork legs and
gently rock the front fork.
Binding/looseness → Adjust the steering
head.
5. Install:
• Upper bracket
Refer to "STEERING HEAD" on page 4-58.
6. Measure:
• Steering head tension
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
NOTE:
Make sure all of the cables and wires are properly routed.
a. Point the front wheel straight ahead.
b. Install a plastic locking tie “1” loosely
around the end of the handlebar as shown.
c. Hook a spring gauge “2” onto the plastic
locking tie.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS21530
CHECKING THE FRONT FORK
1. Stand the vehicle on a level surface.
EWA13120
WARNING
Securely support the vehicle so that there
is no danger of it falling over.
2. Check:
• Inner tube “1”
Damage/scratches → Replace.
• Oil seal “2”
Oil leakage → Replace.
d. Hold the spring gauge at a 90° angle from
the handlebar, pull the spring gauge, and
then record the measurement when the
handlebar starts to run.
Steering head tension
200–500 g
3. Hold the vehicle upright and apply the front
brake.
3-29
CHASSIS
4. Check:
• Front fork operation
Push down hard on the handlebar several
times and check if the front fork rebounds
smoothly.
Rough movement → Repair.
Refer to "FRONT FORK" on page 4-49.
EAS21580
ADJUSTING THE FRONT FORK LEGS
The following procedure applies to both of the
front fork legs.
Spring preload adjusting positions
Minimum
8
Standard
5
Maximum
0
EWA13150
WARNING
• Always adjust both front fork legs evenly.
Uneven adjustment can result in poor
handling and loss of stability.
• Securely support the vehicle so that there
is no danger of it falling over.
Spring preload
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
ECA13570
Rebound damping
CAUTION:
• Grooves are provided to indicate the
adjustment position.
• Never go beyond the maximum or minimum adjustment positions.
ECA13590
1. Adjust:
• Spring preload
1. Adjust:
• Rebound damping
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
CAUTION:
Never go beyond the maximum or minimum
adjustment positions.
a. Turn the adjusting screw “1” in direction “a”
or “b”.
a. Turn the adjusting bolt “1” in direction “a” or
“b”.
Direction “a”
Rebound
damping
(suspension is harder).
Direction “b”
Rebound
damping
(suspension is softer).
Direction “a”
Spring preload is increased (suspension
is harder).
Direction “b”
Spring preload is decreased (suspension
is softer).
3-30
is
increased
is
decreased
CHASSIS
Rebound damping adjust positions
Minimum
26 click(s) out*
Standard
10 click(s) out*
Maximum
1 click(s) out*
* With the adjusting screw fully turned in.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS21610
ADJUSTING THE REAR SHOCK
ABSORBER ASSEMBLY
EWA13120
WARNING
Securely support the vehicle so that there
is no danger of it falling over.
Spring preload
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
ECA13590
Compression damping
Never go beyond the maximum or minimum
adjustment positions.
CAUTION:
ECA13590
CAUTION:
1. Adjust:
• Spring preload
Never go beyond the maximum or minimum
adjustment positions.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
1. Adjust:
• Compression damping
a. Adjust the spring preload with the special
wrench and extension bar included in the
owner’s tool kit.
b. Turn the adjusting ring “1” in direction “a” or
“b”.
c. Align the desired position on the adjusting
ring with the stopper “2”.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the adjusting screw “1” in direction “a”
or “b”.
Direction “a”
Compression damping
(suspension is harder).
Direction “b”
Compression damping
(suspension is softer).
is
is
increased
Direction “a”
Spring preload is increased (suspension
is harder).
Direction “b”
Spring preload is decreased (suspension
is softer).
decreased
Compression damping
points
Minimum
25 click(s) out*
Standard
10 click(s) out*
Maximum
1 click(s) out*
adjust
* With the adjusting screw fully turned in.
3-31
CHASSIS
Compression damping (fast compression
damping)
Spring preload adjusting positions
Minimum
1
Standard
5
Maximum
9
ECA13590
CAUTION:
Never go beyond the maximum or minimum
adjustment positions.
1. Adjust:
• Compression damping (fast compression
damping)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
Rebound damping
a. Turn the adjusting screw “1” in direction “a”
or “b”.
ECA13590
CAUTION:
Direction “a”
Compression damping
(suspension is harder).
Direction “b”
Compression damping
(suspension is softer).
Never go beyond the maximum or minimum
adjustment positions.
1. Adjust:
• Rebound damping
is
increased
is
decreased
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the adjusting knob “1” in direction “a”
or “b”.
Direction “a”
Rebound
damping
(suspension is harder).
Direction “b”
Rebound
damping
(suspension is softer).
is
increased
is
decreased
Compression damping (fast compression damping) adjusting
positions
Minimum
4 turn(s) out*
Standard
3 turn(s) out*
Maximum
0 turn(s) out*
Rebound damping adjust positions
Minimum
20 click(s) out*
Standard
12 click(s) out*
Maximum
3 click(s) out*
* With the adjusting screw fully turned in.
* With the adjusting screw fully turned in.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
Compression damping (slow compression
damping)
ECA13590
CAUTION:
Never go beyond the maximum or minimum
adjustment positions.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
1. Adjust:
• Compression damping (slow compression
damping)
3-32
CHASSIS
EWA13180
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
WARNING
a. Turn the adjusting knob “1” in direction “a”
or “b”.
Direction “a”
Compression damping
(suspension is harder).
Direction “b”
Compression damping
(suspension is softer).
is
increased
is
decreased
• The tire pressure should only be checked
and regulated when the tire temperature
equals the ambient air temperature.
• The tire pressure and the suspension
must be adjusted according to the total
weight (including cargo, rider, passenger
and accessories) and the anticipated
riding speed.
• Operation of an overloaded vehicle could
cause tire damage, an accident or an
injury.
NEVER OVERLOAD THE VEHICLE.
Compression damping (slow
compression damping) adjusting
positions
Minimum
20 click(s) out*
Standard
12 click(s) out*
Maximum
1 click(s) out*
Tire air pressure (measured on
cold tires)
Loading condition
0–90 kg (0–198 lb)
Front
250 kPa (36 psi) (2.50 kgf/cm²)
(2.50 bar)
Rear
290 kPa (42 psi) (2.90 kgf/cm²)
(2.90 bar)
Loading condition
90–195 kg (198–430 lb)
Front
250 kPa (36 psi) (2.50 kgf/cm²)
(2.50 bar)
Rear
290 kPa (42 psi) (2.90 kgf/cm²)
(2.90 bar)
High-speed riding
* With the adjusting screw fully turned in.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS21650
CHECKING THE TIRES
The following procedure applies to both of the
tires.
1. Check:
• Tire pressure
Out of specification → Regulate.
Front
250 kPa (36 psi) (2.50 kgf/cm²)
(2.50 bar)
Rear
290 kPa (42 psi) (2.90 kgf/cm²)
(2.90 bar)
Maximum load
195 kg (430 lb)
* Total weight of rider, passenger, cargo
and accessories
EWA13190
WARNING
It is dangerous to ride with a worn-out tire.
When the tire tread reaches the wear limit,
replace the tire immediately.
3-33
CHASSIS
2. Check:
• Tire surfaces
Damage/wear → Replace the tire.
Tube wheel
Tubeless wheel
Tube tire only
Tube or tubeless tire
EWA14090
WARNING
After extensive tests, the tires listed below
have been approved by Yamaha Motor Co.,
Ltd. for this model. The front and rear tires
should always be by the same manufacturer and of the same design. No guarantee
concerning handling characteristics can be
given if a tire combination other than one
approved by Yamaha is used on this vehicle.
1. Tire tread depth
2. Side wall
3. Wear indicator
Front tire
Size
120/70 ZR17M/C (58W)
Manufacturer/model
PIRELLI/DIABLO CORSA E
Manufacturer/model
MICHELIN/Pilot POWER
Wear limit (front)
0.8 mm (0.03 in)
Wear limit (rear)
0.8 mm (0.03 in)
EWA14080
WARNING
• Do not use a tubeless tire on a wheel
designed only for tube tires to avoid tire
failure and personal injury from sudden
deflation.
• When using a tube tire, be sure to install
the correct tube.
• Always replace a new tube tire and a new
tube as a set.
• To avoid pinching the tube, make sure the
wheel rim band and tube are centered in
the wheel groove.
• Patching a punctured tube is not recommended. If it is absolutely necessary to
do so, use great care and replace the tube
as soon as possible with a good quality
replacement.
Rear tire
Size
190/50 ZR17M/C (73W)
Manufacturer/model
PIRELLI/DIABLO CORSA L
Manufacturer/model
MICHELIN/ Pilot POWER
EWA13210
WARNING
New tires have a relatively low grip on the
road surface until they have been slightly
worn. Therefore, approximately 100 km
should be traveled at normal speed before
any high-speed riding is done.
NOTE:
For tires with a direction of rotation mark “1”:
• Install the tire with the mark pointing in the
direction of wheel rotation.
• Align the mark “2” with the valve installation
point.
A. Tire
B. Wheel
3-34
CHASSIS
EAS21700
LUBRICATING THE LEVERS
Lubricate the pivoting point and metal-to-metal
moving parts of the levers.
Recommended lubricant
Lithium-soap-based grease
EAS21710
LUBRICATING THE PEDAL
Lubricate the pivoting point and metal-to-metal
moving parts of the pedal.
EAS21670
CHECKING THE WHEELS
The following procedure applies to both of the
wheels.
1. Check:
• Wheel
Damage/out-of-round → Replace.
Recommended lubricant
Lithium-soap-based grease
EAS21720
LUBRICATING THE SIDESTAND
Lubricate the pivoting point and metal-to-metal
moving parts of the sidestand.
EWA13260
WARNING
Never attempt to make any repairs to the
wheel.
Recommended lubricant
Lithium-soap-based grease
NOTE:
EAS21740
After a tire or wheel has been changed or
replaced, always balance the wheel.
LUBRICATING THE REAR SUSPENSION
Lubricate the pivoting point and metal-to-metal
moving parts of the rear suspension.
EAS21690
CHECKING AND LUBRICATING THE
CABLES
The following procedure applies to all of the
inner and outer cables.
Recommended lubricant
Molybdenum disulfide grease
EWA13270
WARNING
Damaged outer cable may cause the cable
to corrode and interfere with its movement.
Replace damaged outer cable and inner
cables as soon as possible.
1. Check:
• Outer cable
Damage → Replace.
2. Check:
• Cable operation
Rough movement → Lubricate.
Recommended lubricant
Engine oil or a suitable cable
lubricant
NOTE:
Hold the cable end upright and pour a few
drops of lubricant into the cable sheath or use
a suitable lubricating device.
3-35
ELECTRICAL SYSTEM
EAS21750
ELECTRICAL SYSTEM
EAS21760
CHECKING AND CHARGING THE BATTERY
Refer to "ELECTRICAL COMPONENTS" on
page 8-69.
EAS21770
CHECKING THE FUSES
Refer to "ELECTRICAL COMPONENTS" on
page 8-69.
5. Remove:
• Headlight bulb
EAS21790
REPLACING THE HEADLIGHT BULBS
The following procedure applies to both of the
headlight bulbs.
1. Remove:
• Intake air duct panel
Refer to "GENERAL CHASSIS" on page 41.
2. Remove:
• Headlight bulb coupler (high beam) “1”
• Headlight bulb cover “2”
EWA13320
WARNING
Since the headlight bulb gets extremely
hot, keep flammable products and your
hands away from the bulb until it has
cooled down.
a. High beam
b. High beam bulb socket
c. Low beam
6. Install:
A. High beam
B. Low beam
• Headlight bulb New
Secure the new headlight bulbs with the
headlight bulb holder.
3. Disconnect:
• Headlight bulb coupler (low beam) “1”
ECA13690
CAUTION:
Avoid touching the glass part of the headlight bulb to keep it free from oil, otherwise
the transparency of the glass, the life of the
bulb and the luminous flux will be
adversely affected. If the headlight bulb
gets soiled, thoroughly clean it with a cloth
moistened with alcohol or lacquer thinner.
7.
•
8.
•
9.
•
4. Remove:
• Headlight bulb holders “3”
3-36
Install:
Headlight bulb holder
Connect:
Headlight bulb coupler (low beam)
Install:
Headlight bulb cover
ELECTRICAL SYSTEM
10. Connect:
• Headlight bulb coupler (high beam)
11. Install:
• Intake air duct panel
Refer to "GENERAL CHASSIS" on page 41.
EAS21810
ADJUSTING THE HEADLIGHT BEAMS
The following procedure applies to both of the
headlights.
1. Remove:
Front cowling inner panels
Refer to "GENERAL CHASSIS" on page 41.
2. Adjust:
• Headlight beam (vertically)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
4. Install:
Front cowling inner panels
Refer to "GENERAL CHASSIS" on page 41.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the adjusting screw “1” in direction “a”
or “b”.
Direction “a”
Headlight beam is raised.
Direction “b”
Headlight beam is lowered.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Adjust:
• Headlight beam (horizontally)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the adjusting knob “2” in direction “a”
or “b”.
Left headlight
Direction “a”
Headlight beam moves to the right.
Direction “b”
Headlight beam moves to the left.
Right headlight
Direction “a”
Headlight beam moves to the left.
Direction “b”
Headlight beam moves to the right.
3-37
CHASSIS
GENERAL CHASSIS....................................................................................4-1
CHECKING THE INTAKE FUNNEL........................................................4-5
CHECKING THE INTAKE FUNNEL........................................................4-5
CHECKING THE INTAKE FUNNEL OPERATION ..................................4-5
REMOVING THE COVER.......................................................................4-7
INSTALLING THE COVER .....................................................................4-7
FRONT WHEEL ............................................................................................4-8
REMOVING THE FRONT WHEEL .......................................................4-10
CHECKING THE FRONT WHEEL........................................................4-10
ADJUSTING THE FRONT WHEEL STATIC BALANCE .......................4-11
INSTALLING THE FRONT WHEEL ......................................................4-12
REAR WHEEL ............................................................................................4-13
REMOVING THE REAR WHEEL .........................................................4-16
CHECKING THE REAR WHEEL ..........................................................4-16
CHECKING THE REAR WHEEL DRIVE HUB .....................................4-17
CHECKING AND REPLACING THE REAR WHEEL SPROCKET .......4-17
ADJUSTING THE REAR WHEEL STATIC BALANCE..........................4-17
INSTALLING THE REAR WHEEL ........................................................4-17
FRONT BRAKE ..........................................................................................4-19
INTRODUCTION ..................................................................................4-24
CHECKING THE FRONT BRAKE DISCS ............................................4-24
REPLACING THE FRONT BRAKE PADS ............................................4-25
REMOVING THE FRONT BRAKE CALIPERS .....................................4-26
DISASSEMBLING THE FRONT BRAKE CALIPERS ...........................4-27
CHECKING THE FRONT BRAKE CALIPERS .....................................4-27
ASSEMBLING THE FRONT BRAKE CALIPERS .................................4-27
INSTALLING THE FRONT BRAKE CALIPERS....................................4-28
REMOVING THE FRONT BRAKE MASTER CYLINDER.....................4-29
CHECKING THE FRONT BRAKE MASTER CYLINDER .....................4-29
ASSEMBLING THE FRONT BRAKE MASTER CYLINDER.................4-30
INSTALLING THE FRONT BRAKE MASTER CYLINDER ...................4-30
REAR BRAKE ............................................................................................4-32
INTRODUCTION ..................................................................................4-37
CHECKING THE REAR BRAKE DISC .................................................4-37
REPLACING THE REAR BRAKE PADS ..............................................4-37
REMOVING THE REAR BRAKE CALIPER..........................................4-39
DISASSEMBLING THE REAR BRAKE CALIPER................................4-39
CHECKING THE REAR BRAKE CALIPER ..........................................4-39
ASSEMBLING THE REAR BRAKE CALIPER......................................4-40
INSTALLING THE REAR BRAKE CALIPER.........................................4-40
REMOVING THE REAR BRAKE MASTER CYLINDER .......................4-41
CHECKING THE REAR BRAKE MASTER CYLINDER .......................4-41
ASSEMBLING THE REAR BRAKE MASTER CYLINDER ...................4-42
INSTALLING THE REAR BRAKE MASTER CYLINDER......................4-42
4
HANDLEBARS ...........................................................................................4-44
REMOVING THE HANDLEBAR ...........................................................4-46
CHECKING THE HANDLEBARS .........................................................4-46
INSTALLING THE HANDLEBARS........................................................4-46
CHECKING THE STEERING DAMPER ...............................................4-48
FRONT FORK.............................................................................................4-49
REMOVING THE FRONT FORK LEGS ...............................................4-51
DISASSEMBLING THE FRONT FORK LEGS .....................................4-51
CHECKING THE FRONT FORK LEGS................................................4-52
ASSEMBLING THE FRONT FORK LEGS ...........................................4-53
INSTALLING THE FRONT FORK LEGS ..............................................4-57
STEERING HEAD.......................................................................................4-58
REMOVING THE LOWER BRACKET ..................................................4-60
CHECKING THE STEERING HEAD ....................................................4-60
INSTALLING THE STEERING HEAD...................................................4-60
REAR SHOCK ABSORBER ASSEMBLY ..................................................4-62
HANDLING THE REAR SHOCK ABSORBER .....................................4-63
DISPOSING OF A REAR SHOCK ABSORBER...................................4-63
REMOVING THE REAR SHOCK ABSORBER ASSEMBLY.................4-63
CHECKING THE REAR SHOCK ABSORBER ASSEMBLY .................4-63
CHECKING THE CONNECTING ARM AND RELAY ARM ..................4-64
INSTALLING THE RELAY ARM............................................................4-64
INSTALLING THE REAR SHOCK ABSORBER ASSEMBLY ...............4-64
SWINGARM ................................................................................................4-65
REMOVING THE SWINGARM .............................................................4-67
CHECKING THE SWINGARM .............................................................4-68
INSTALLING THE SWINGARM ............................................................4-68
CHAIN DRIVE .............................................................................................4-70
REMOVING THE DRIVE CHAIN ..........................................................4-71
CHECKING THE DRIVE CHAIN ..........................................................4-71
CHECKING THE REAR WHEEL SPROCKET .....................................4-72
CHECKING THE REAR WHEEL DRIVE HUB .....................................4-72
INSTALLING THE DRIVE CHAIN .........................................................4-72
GENERAL CHASSIS
EAS21830
GENERAL CHASSIS
Removing the seat and battery
Order
1
2
3
4
5
6
7
8
9
10
Job/Parts to remove
Q’ty
Rider seat
Passenger seat
Battery negative lead
Battery positive lead
ECU (engine control unit)
ECU lead coupler
ECU cover
Battery band
Battery
Battery seat
1
1
1
1
1
1
1
1
1
Remarks
Disconnect.
For installation, reverse the removal procedure.
4-1
GENERAL CHASSIS
Removing the front cowling and side cowlings
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
Job/Parts to remove
Side cowling inner panel
Side cowling
Front turn signal light lead coupler
Lower cowling
Lower cowling front cover
Intake air duct panel
Intake air temperature coupler
Meter assembly coupler
Front cowling
Rear intake air duct
Front intake air duct
Rear view mirror
Windshield
Q’ty
2
2
2
2
1
2
1
1
1
2
2
2
1
Remarks
Disconnect.
Disconnect.
Disconnect.
For installation, reverse the removal procedure.
4-2
GENERAL CHASSIS
Removing the rear fender
Order
1
2
3
4
5
6
Job/Parts to remove
Rider seat
Passenger seat
Muffler
Upper tail cover
Tail/brake light lead coupler
Turn signal light/licence plate light lead coupler
Mud guard assembly
Lower tail cover
Tail/brake light
Q’ty
1
1
4
1
1
1
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "ENGINE REMOVAL" on page 5-1.
Disconnect.
Disconnect.
For installation, reverse the removal procedure.
4-3
GENERAL CHASSIS
Removing the air filter case
Order
1
2
3
4
5
6
7
8
9
10
11
Job/Parts to remove
Rider seat
Fuel tank
Air filter case cover
Air filter
Intake funnel servo motor rod assembly
Intake funnel joint
Intake funnel
Intake funnel rod
Bushing 2
Air induction system hose
Crankcase breather hose
Air filter case
Intake funnel servo motor
Q’ty
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "FUEL TANK" on page 7-1.
1
1
1
2
2
2
5
1
1
1
1
For installation, reverse the removal procedure.
4-4
GENERAL CHASSIS
surface between upper stopper and lower
seating position when it is moved by
hand.
• Make sure that the intake funnel smoothly
strokes from the upper position to the
seating position by its own weight.
EAS4C81025
CHECKING THE INTAKE FUNNEL
1. Check:
• Intake funnel
Cracks/damage → Replace.
• Intake funnel seal rubber “1”
Cracks/damage → Replace.
• Intake funnel rods
Damage/scratches → Replace.
A. Upper
B. Lower
EAS4C81026
• Air filter case
• Intake funnel joint bolt “1”
CHECKING THE INTAKE FUNNEL
1. Install:
• Intake funnel rod
• Intake funnel
Intake funnel joint bolt
6 Nm (0.6 m·kg, 4.3 ft·lb)
NOTE:
ECA4C81022
• To install the intake funnel, do not mistake
the front and rear directions.
• For Bushing 2 “a”, point the direction of notch
hole as shown in the illustration.
CAUTION:
Do not remove the bolts from the intake
funnel joint.
• Intake funnel joint bolt “2”
Intake funnel joint bolt
3 Nm (0.3 m·kg, 2.2 ft·lb)
• Intake funnel servo motor rod assembly
EAS4C81027
CHECKING THE INTAKE FUNNEL OPERATION
1. Check:
• Intake funnel operation
ECA4C81020
CAUTION:
• After assembly, make sure that the intake
funnel smoothly moves to the contacting
4-5
GENERAL CHASSIS
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Activate the diagnostic mode and select
the diagnostic code number “34”.
Refer to "FUEL INJECTION SYSTEM" on
page 8-29.
b. Set the engine stop switch to “ ”.
c. Check that the intake funnel operate
smoothly strokes from the upper position to
the lower seating position.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
4-6
GENERAL CHASSIS
EAS21840
REMOVING THE COVER
1. Remove:
• Tail cover
• Rear fender
NOTE:
To remove the quick fastener, push its center
with a screwdriver, then pull the fastener out.
EAS21850
INSTALLING THE COVER
1. Install:
• Rear fender
• Tail cover
NOTE:
To install the quick fastener, push its pin so that
it protrudes from the fastener head, then insert
the fastener into the cover and push the pin “a”
in with screwdriver. Make sure that the pin is
flush with the fastener’s head.
4-7
FRONT WHEEL
EAS21870
FRONT WHEEL
Removing the front wheel and brake discs
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
Job/Parts to remove
Reflector
Reflector bracket
Left brake hose holder
Right brake hose holder
Left front brake caliper
Right front brake caliper
Front wheel axle pinch bolt
Front wheel axle bolt
Front wheel axle
Collar (left and right)
Dust cover (left and right)
Front wheel
Front brake disc (left and right)
Q’ty
2
2
1
1
1
1
4
1
1
2
2
1
2
Remarks
For installation, reverse the removal procedure.
4-8
FRONT WHEEL
Disassembling the front wheel
Order
1
2
3
Job/Parts to remove
Oil seal (left and right)
Wheel bearing (left and right)
Spacer
Q’ty
2
1
1
Remarks
For assembly, reverse the disassembly procedure.
4-9
FRONT WHEEL
Refer to "CHECKING THE TIRES" on page
3-33 and "CHECKING THE WHEELS" on
page 3-35.
3. Measure:
• Radial wheel runout “1”
• Lateral wheel runout “2”
Over the specified limits → Replace.
EAS21900
REMOVING THE FRONT WHEEL
1. Stand the vehicle on a level surface.
EWA13120
WARNING
Securely support the vehicle so that there
is no danger of it falling over.
NOTE:
Place the vehicle on a suitable stand so that
the front wheel is elevated.
2. Remove:
• Left brake caliper
• Right brake caliper
NOTE:
Do not apply the brake lever when removing
the brake calipers.
3. Elevate:
• Front wheel
Radial wheel runout limit
1.0 mm (0.04 in)
Lateral wheel runout limit
0.5 mm (0.02 in)
NOTE:
Place the vehicle on a suitable stand so that
the front wheel is elevated.
4.
•
5.
•
•
•
4. Check:
• Wheel bearings
Front wheel turns roughly or is loose →
Replace the wheel bearings.
• Oil seals
Damage/wear → Replace.
Loosen:
Front wheel axle pinch bolt
Remove:
Front wheel axle bolt
Front wheel axle
Front wheel
EAS21920
CHECKING THE FRONT WHEEL
1. Check:
• Wheel axle
Roll the wheel axle on a flat surface.
Bends → Replace.
5. Replace:
• Wheel bearings New
• Oil seals New
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Clean the outside of the front wheel hub.
b. Remove the oil seals “1” with a flat-head
screwdriver.
EWA13460
WARNING
Do not attempt to straighten a bent wheel
axle.
NOTE:
To prevent damaging the wheel, place a rag “2”
between the screwdriver and the wheel surface.
2. Check:
• Tire
• Front wheel
Damage/wear → Replace.
4-10
FRONT WHEEL
• Adjust the front wheel static balance with the
brake disc installed.
1.
•
2.
•
Remove:
Balancing weight(s)
Find:
Front wheel’s heavy spot
NOTE:
Place the front wheel on a suitable balancing
stand.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
c. Remove the wheel bearings “3” with a general bearing puller.
a. Spin the front wheel.
b. When the front wheel stops, put an “X1”
mark at the bottom of the wheel.
d. Install the new wheel bearings and oil seals
in the reverse order of disassembly.
ECA14130
c. Turn the front wheel 90° so that the “X1”
mark is positioned as shown.
d. Release the front wheel.
e. When the wheel stops, put an “X2” mark at
the bottom of the wheel.
CAUTION:
Do not contact the wheel bearing inner race
“4” or balls “5”. Contact should be made
only with the outer race “6”.
NOTE:
Use a socket “7” that matches the diameter of
the wheel bearing outer race and oil seal.
f.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
Repeat steps (d) through (f) several times
until all the marks come to rest at the same
spot.
g. The spot where all the marks come to rest
is the front wheel’s heavy spot “X”.
EAS21970
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
ADJUSTING THE FRONT WHEEL STATIC
BALANCE
3. Adjust:
• Front wheel static balance
NOTE:
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
• After replacing the tire, wheel or both, the
front wheel static balance should be
adjusted.
a. Install a balancing weight “1” onto the rim
exactly opposite the heavy spot “X”.
4-11
FRONT WHEEL
1. Lubricate:
• Wheel axle
• Oil seal lips
NOTE:
Start with the lightest weight.
Recommended lubricant
Lithium-soap-based grease
2. Lift the wheel up between the fork legs.
3. Insert the wheel axle.
NOTE:
Install the tire and wheel with the mark “1”
pointing in the direction of wheel rotation.
b. Turn the front wheel 90° so that the heavy
spot is positioned as shown.
4. Lower the front wheel so that it is on the
ground.
5. Tighten:
• Front wheel axle bolt
c. If the heavy spot does not stay in that position, install a heavier weight.
d. Repeat steps (b) and (c) until the front
wheel is balanced.
Front wheel axle bolt
91 Nm (9.1 m·kg, 66 ft·lb)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
• Front wheel axle pinch bolt
4. Check:
• Front wheel static balance
Front wheel axle pinch bolt
21 Nm (2.1 m·kg, 15 ft·lb)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the front wheel and make sure it stays
at each position shown.
ECA4C81001
CAUTION:
Before tightening the wheel axle, push down
hard on the handlebar(s) several times and
check if the front fork rebounds smoothly.
6. Install:
• Front brake calipers
Front brake caliper bolt
35 Nm (3.5 m·kg, 25 ft·lb)
b. If the front wheel does not remain stationary at all of the positions, rebalance it.
EWA13490
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
Make sure the brake cable is routed properly.
WARNING
EAS22000
NOTE:
INSTALLING THE FRONT WHEEL
The following procedure applies to both of the
brake discs.
Make sure that there is enough space between
the brake pads before installing the brake calipers on to the brake discs.
4-12
REAR WHEEL
EAS22020
REAR WHEEL
Removing the rear wheel
Order
1
2
3
4
5
6
7
8
9
10
Job/Parts to remove
Rear brake caliper
Locknut (left and right)
Adjusting bolt (left and right)
Rear wheel axle nut
Washer
Rear wheel axle
Left adjusting block
Right adjusting block
Rear wheel
Rear brake caliper bracket
Q’ty
1
2
2
1
1
1
1
1
1
1
Remarks
Loosen.
Loosen.
For installation, reverse the removal procedure.
4-13
REAR WHEEL
Removing the brake disc and rear wheel sprocket
Order
1
2
3
4
5
6
7
8
9
Job/Parts to remove
Rear brake disc
Rear wheel sprocket
Collar
Dust cover
Oil seal
Bearing
Rear wheel drive hub
Rear wheel drive hub damper
Rear wheel
Q’ty
1
1
2
2
1
1
1
6
1
Remarks
For installation, reverse the removal procedure.
4-14
REAR WHEEL
Disassembling the rear wheel
Order
1
2
3
4
5
6
Job/Parts to remove
Q’ty
1
1
1
1
1
1
Collar
Bearing
Spacer
Oil seal
Circlip
Bearing
Remarks
For assembly, reverse the disassembly procedure.
4-15
REAR WHEEL
EAS22040
REMOVING THE REAR WHEEL
1. Stand the vehicle on a level surface.
EWA13120
WARNING
Securely support the vehicle so that there
is no danger of it falling over.
NOTE:
Place the vehicle on a suitable stand so that
the rear wheel is elevated.
2. Remove:
• Brake caliper “1”
NOTE:
Push the rear wheel forward and remove the
drive chain from the rear wheel sprocket.
5.
•
•
•
•
Remove:
Left collar “1”
Rear wheel drive hub “2”
Rear wheel drive hub damper
Right collar
NOTE:
Do not depress the brake pedal when removing the brake caliper.
3. Loosen:
• Locknut “1”
• Adjusting nut “2”
EAS22090
4.
•
•
•
CHECKING THE REAR WHEEL
1. Check:
• Wheel axle
• Rear wheel
• Wheel bearings
• Oil seals
Refer to "CHECKING THE FRONT
WHEEL" on page 4-10.
2. Check:
• Tire
• Rear wheel
Damage/wear → Replace.
Refer to "CHECKING THE TIRES" on page
3-33 and "CHECKING THE WHEELS" on
page 3-35.
3. Measure:
• Radial wheel runout
• Lateral wheel runout
Refer to "CHECKING THE FRONT
WHEEL" on page 4-10.
Remove:
Wheel axle nut “1”
Wheel axle
Rear wheel
4-16
REAR WHEEL
EAS22110
NOTE:
CHECKING THE REAR WHEEL DRIVE HUB
1. Check:
• Rear wheel drive hub “1”
Cracks/damage → Replace.
• Rear wheel drive hub dampers “2”
Damage/wear → Replace.
Tighten the self-locking nuts in stages and in a
crisscross pattern.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS22150
EAS22120
ADJUSTING THE REAR WHEEL STATIC
BALANCE
CHECKING AND REPLACING THE REAR
WHEEL SPROCKET
1. Check:
• Rear wheel sprocket
More than 1/4 tooth “a” wear → Replace
the rear wheel sprocket.
Bent teeth → Replace the rear wheel
sprocket.
NOTE:
• After replacing the tire, wheel or both, the
rear wheel static balance should be adjusted.
• Adjust the rear wheel static balance with the
brake disc and rear wheel drive hub installed.
1. Adjust:
• Rear wheel static balance
Refer to "ADJUSTING THE FRONT
WHEEL STATIC BALANCE" on page 4-11.
EAS22160
INSTALLING THE REAR WHEEL
1. Lubricate:
• Wheel axle
• Wheel bearings
• Oil seal lips
b. Correct
1. Drive chain roller
2. Rear wheel sprocket
Recommended lubricant
Lithium-soap-based grease
2. Replace:
• Rear wheel sprocket
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
2. Adjust:
• Drive chain slack
Refer to "ADJUSTING THE DRIVE CHAIN
SLACK" on page 3-27.
a. Remove the self-locking nuts and the rear
wheel sprocket.
b. Clean the rear wheel drive hub with a clean
cloth, especially the surfaces that contact
the sprocket.
c. Install the new rear wheel sprocket.
Drive chain slack
30.0–40.0 mm (1.18–1.57 in)
3. Tighten:
• Rear wheel axle nut
• Rear brake caliper bolts
Rear wheel sprocket self-locking nut
100 Nm (10 m·kg, 72 ft·lb)
4-17
REAR WHEEL
Rear wheel axle nut
150 Nm (15.0 m·kg, 108 ft·lb)
Rear brake caliper bolt (front
side)
27 Nm (2.7 m·kg, 20 ft·lb)
Rear brake caliper bolt (rear
side)
22 Nm (2.2 m·kg, 16 ft·lb)
EWA13500
WARNING
Make sure the brake hose is routed properly.
4-18
FRONT BRAKE
EAS22210
FRONT BRAKE
Removing the front brake pads
Order
1
2
3
4
5
6
7
Job/Parts to remove
Brake hose holder
Front brake caliper
Brake pad clip
Brake pad pin
Brake pad spring
Brake pad
Bleed screw
Q’ty
1
1
4
2
2
4
1
Remarks
For installation, reverse the removal procedure.
4-19
FRONT BRAKE
Removing the front brake master cylinder
Order
Job/Parts to remove
Q’ty
Brake fluid
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Stopper
Brake fluid reservoir cap
Brake fluid reservoir diaphragm holder
Brake fluid reservoir diaphragm
Brake fluid reservoir tank
Brake fluid reservoir hose
Brake lever
Front brake light switch lead connector
Union bolt
Copper washer
Brake hose
Brake master cylinder holder
Brake master cylinder
Front brake light switch
1
1
1
1
1
1
1
1
1
2
1
1
1
1
Remarks
Drain.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
Disconnect.
For installation, reverse the removal procedure.
4-20
FRONT BRAKE
Disassembling the front brake master cylinder
Order
1
2
3
Job/Parts to remove
Brake master cylinder kit
Bleed screw
Brake master cylinder body
Q’ty
1
1
1
Remarks
For assembly, reverse the disassembly procedure.
4-21
FRONT BRAKE
Removing the front brake calipers
Order
Job/Parts to remove
Q’ty
Drain.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
Brake fluid
1
2
3
4
Remarks
Union bolt
Copper washer
Brake hose
Brake caliper
1
2
1
1
For installation, reverse the removal procedure.
4-22
FRONT BRAKE
Disassembling the front brake calipers
Order
1
2
3
4
5
6
7
Job/Parts to remove
Brake pad clip
Brake pad pin
Brake pad spring
Brake pad
Brake caliper piston
Brake caliper piston seal
Bleed screw
Q’ty
4
2
2
4
6
12
1
Remarks
For assembly, reverse the disassembly procedure.
4-23
FRONT BRAKE
EAS22220
INTRODUCTION
EWA14100
WARNING
Disc brake components rarely require disassembly. Therefore, always follow these
preventive measures:
• Never disassemble brake components
unless absolutely necessary.
• If any connection on the hydraulic brake
system is disconnected, the entire brake
system must be disassembled, drained,
cleaned, properly filled, and bled after
reassembly.
• Never use solvents on internal brake
components.
• Use only clean or new brake fluid for
cleaning brake components.
• Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean
up any spilt brake fluid immediately.
• Avoid brake fluid coming into contact
with the eyes as it can cause serious
injury.
• FIRST AID FOR BRAKE FLUID ENTERING
THE EYES:
• Flush with water for 15 minutes and get
immediate medical attention.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Place the vehicle on a suitable stand so
that the front wheel is elevated.
b. Before measuring the front brake disc
deflection, turn the handlebar to the left or
right to ensure that the front wheel is stationary.
c. Remove the brake caliper.
d. Hold the dial gauge at a right angle against
the brake disc surface.
e. Measure the deflection 1.5 mm (0.06 in)
below the edge of the brake disc.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
4. Measure:
• Brake disc thickness
Measure the brake disc thickness at a few
different locations.
Out of specification → Replace.
EAS22240
Brake disc thickness limit
4.5 mm (0.18 in)
CHECKING THE FRONT BRAKE DISCS
The following procedure applies to both brake
discs.
1. Remove:
• Front wheel
Refer to "FRONT WHEEL" on page 4-8.
2. Check:
• Brake disc
Damage/galling → Replace.
3. Measure:
• Brake disc deflection
Out of specification → Correct the brake
disc deflection or replace the brake disc.
5. Adjust:
• Brake disc deflection
Brake disc deflection limit
0.10 mm (0.0039 in)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the brake disc.
b. Rotate the brake disc by one bolt hole.
c. Install the brake disc.
NOTE:
Tighten the brake disc bolts in stages and in a
crisscross pattern.
4-24
FRONT BRAKE
Front brake disc bolt
18 Nm (1.8 m·kg, 13 ft·lb)
LOCTITE®
3. Remove:
• Brake pads “1”
d. Measure the brake disc deflection.
e. If out of specification, repeat the adjustment steps until the brake disc deflection is
within specification.
f. If the brake disc deflection cannot be
brought within specification, replace the
brake disc.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
6. Install:
• Front wheel
Refer to "FRONT WHEEL" on page 4-8.
4. Measure:
• Brake pad wear limit “a”
Out of specification → Replace the brake
pads as a set.
EAS22260
REPLACING THE FRONT BRAKE PADS
Brake pad lining
(inner)
4.5 mm (0.18 in)
Limit
0.8 mm (0.03 in)
Brake pad lining
(outer)
4.5 mm (0.18 in)
Limit
0.8 mm (0.03 in)
NOTE:
When replacing the brake pads, it is not necessary to disconnect the brake hose or disassemble the brake caliper.
1. Remove:
• Brake hose holder “1”
• Brake caliper “2”
2.
•
•
•
Remove:
Brake pad clips “1”
Brake pad pins “2”
Brake pad springs “3”
5. Install:
• Brake pads
• Brake pad spring
4-25
thickness
thickness
FRONT BRAKE
Below the minimum level mark “a” → Add
the recommended brake fluid to the proper
level.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-23.
NOTE:
Always install new brake pads and a new
brake pad spring as a set.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect a clear plastic hose “1” tightly to
the bleed screw “2”. Put the other end of
the hose into an open container.
8. Check:
• Brake lever operation
Soft or spongy feeling → Bleed the brake
system.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
b. Loosen the bleed screw and push the
brake caliper pistons into the brake caliper
with your finger.
c. Tighten the bleed screw.
EAS22300
REMOVING THE FRONT BRAKE CALIPERS
The following procedure applies to both of the
brake calipers.
Bleed screw
6 Nm (0.6 m·kg, 4.3 ft·lb)
NOTE:
d. Install new brake pads and a new brake
pad spring.
Before removing the brake caliper, drain the
brake fluid from the entire brake system.
NOTE:
The arrow mark “a” on the brake pad springs
must point in the direction of disc rotation.
1.
•
•
•
Remove:
Union bolt “1”
Copper washers “2”
Brake hose “3”
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
6.
•
•
•
Install:
Brake pad pins
Brake pad clips
Brake caliper
NOTE:
Put the end of the brake hose into a container
and pump out the brake fluid carefully.
Front brake caliper bolt
35 Nm (3.5 m·kg, 25 ft·lb)
7. Check:
• Brake fluid level
4-26
FRONT BRAKE
EAS22360
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
DISASSEMBLING THE FRONT BRAKE
CALIPERS
The following procedure applies to both of the
brake calipers.
1. Remove:
• Brake caliper pistons “1”
• Brake caliper piston seals “2”
EAS22390
CHECKING THE FRONT BRAKE CALIPERS
Recommended brake component replacement schedule
Brake pads
If necessary
Piston seals
Every two years
Brake hoses
Every four years
Every two years and
Brake fluid
whenever the brake is
disassembled
1. Check:
• Brake caliper pistons “1”
Rust/scratches/wear → Replace the brake
caliper pistons.
• Brake caliper cylinders “2”
Scratches/wear → Replace the brake caliper assembly.
• Brake caliper body “3”
Cracks/damage → Replace the brake caliper assembly.
• Brake fluid delivery passages
(brake caliper body)
Obstruction → Blow out with compressed
air.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Secure the right side brake caliper pistons
with a piece of wood “a”.
b. Blow compressed air into the brake hose
joint opening “b” to force out the left side
pistons from the brake caliper.
EWA4C81005
WARNING
• Never try to pry out the brake caliper pistons.
• Do not loosen the bolts “3”.
EWA13600
WARNING
Whenever a brake caliper is disassembled,
replace the piston seals.
EAS22410
ASSEMBLING THE FRONT BRAKE CALIPERS
EWA13620
WARNING
• Before installation, all internal brake components should be cleaned and lubricated
with clean or new brake fluid.
• Never use solvents on internal brake
components as they will cause the piston
seals to swell and distort.
c. Remove the brake caliper piston seals.
d. Repeat the previous steps to force out the
right side pistons from the brake caliper.
4-27
FRONT BRAKE
• Whenever a brake caliper is disassembled, replace the brake caliper piston
seals.
Recommended fluid
DOT 4
EAS22450
INSTALLING THE FRONT BRAKE CALIPERS
The following procedure applies to both of the
brake calipers.
1. Install:
• Brake pads
• Brake pad springs
• Brake pad pins
2. Install:
• Brake caliper “1”
•
•
•
•
3. Fill:
• Brake fluid reservoir
(with the specified amount of the recommended brake fluid)
Recommended fluid
DOT 4
Copper washers New
Brake hose “2”
Union bolt “3”
Brake hose holder
EWA13090
WARNING
• Use only the designated brake fluid.
Other brake fluids may cause the rubber
seals to deteriorate, causing leakage and
poor brake performance.
• Refill with the same type of brake fluid
that is already in the system. Mixing brake
fluids may result in a harmful chemical
reaction, leading to poor brake performance.
• When refilling, be careful that water does
not enter the brake fluid reservoir. Water
will significantly lower the boiling point of
the brake fluid and could cause vapor
lock.
Front brake caliper bolt
35 Nm (3.5 m·kg, 25 ft·lb)
Front brake hose union bolt
30 Nm (3.0 m·kg, 22 ft·lb)
Front brake hose holder
6 Nm (0.6 m·kg, 4.3 ft·lb)
ECA13540
CAUTION:
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean
up any spilt brake fluid immediately.
4. Bleed:
• Brake system
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
5. Check:
• Brake fluid level
Below the minimum level mark “a” → Add
the recommended brake fluid to the proper
level.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-23.
EWA13530
WARNING
Proper brake hose routing is essential to
insure safe vehicle operation. Refer to
"CABLE ROUTING" on page 2-39.
ECA14170
CAUTION:
When installing the brake hose onto the
brake caliper “1”, make sure the brake pipe
“a” touches the projection “b” on the brake
caliper.
4-28
FRONT BRAKE
EAS22510
CHECKING THE FRONT BRAKE MASTER
CYLINDER
1. Check:
• Brake master cylinder
Damage/scratches/wear → Replace.
• Brake fluid delivery passages
(brake master cylinder body)
Obstruction → Blow out with compressed
air.
6. Check:
• Brake lever operation
Soft or spongy feeling → Bleed the brake
system.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
EAS22490
REMOVING THE FRONT BRAKE MASTER
CYLINDER
2. Check:
• Brake master cylinder kit
Damage/scratches/wear → Replace.
NOTE:
Before removing the front brake master cylinder, drain the brake fluid from the entire brake
system.
1. Disconnect:
• Brake switch coupler “1”
(from the brake switch)
2. Remove:
• Union bolt “2”
• Copper washers “3”
• Brake hoses “4”
3. Check:
• Brake fluid reservoir tank “1”
Cracks/damage → Replace.
• Brake fluid reservoir diaphragm “2”
Damage/wear → Replace.
NOTE:
To collect any remaining brake fluid, place a
container under the master cylinder and the
end of the brake hose.
4. Check:
• Brake hose “3”
Cracks/damage/wear → Replace.
3. Remove:
• Brake master cylinder holder
• Brake master cylinder
4-29
FRONT BRAKE
2. Install:
EAS22520
ASSEMBLING THE FRONT BRAKE MASTER CYLINDER
• Copper washers New
• Brake hose
• Union bolt
EWA13520
WARNING
Front brake hose union bolt
30 Nm (3.0 m·kg, 22 ft·lb)
• Before installation, all internal brake components should be cleaned and lubricated
with clean or new brake fluid.
• Never use solvents on internal brake
components.
EWA13530
WARNING
Proper brake hose routing is essential to
insure safe vehicle operation. Refer to
"CABLE ROUTING" on page 2-39.
Recommended fluid
DOT 4
NOTE:
1. Instal:
• While holding the brake hose, tighten the
union bolt as shown.
• Turn the handlebar to the left and right to
make sure the brake hose does not touch
other parts (e.g., wire harness, cables,
leads). Correct if necessary.
• Brake master cylinder kit New
EAS22540
INSTALLING THE FRONT BRAKE MASTER
CYLINDER
1. Install:
• Brake master cylinder “1”
• Brake master cylinder holder “2”
Front brake master cylinder
holder bolt
13 Nm (1.3 m·kg, 9.4 ft·lb)
NOTE:
• Install the brake master cylinder holder with
the “UP” mark “a” facing up.
• Align the end of the brake master cylinder
holder with the punch mark “b” on the handlebar.
• First, tighten the upper bolt, then the lower
bolt.
• There should be 2–2.5 mm (0.08–0.10 in) of
clearance between the right handlebar
switch and the brake master cylinder holder.
a. 36°
b. 3 mm (0.12 in)
3. Fill:
• Brake fluid reservoir
(with the specified amount of the recommended brake fluid)
Recommended fluid
DOT 4
4-30
FRONT BRAKE
EWA13090
WARNING
• Use only the designated brake fluid.
Other brake fluids may cause the rubber
seals to deteriorate, causing leakage and
poor brake performance.
• Refill with the same type of brake fluid
that is already in the system. Mixing brake
fluids may result in a harmful chemical
reaction, leading to poor brake performance.
• When refilling, be careful that water does
not enter the brake fluid reservoir. Water
will significantly lower the boiling point of
the brake fluid and could cause vapor
lock.
ECA13540
CAUTION:
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean
up any spilt brake fluid immediately.
4. Bleed:
• Brake system
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
5. Check:
• Brake fluid level
Below the minimum level mark “a” → Add
the recommended brake fluid to the proper
level.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-23.
6. Check:
• Brake lever operation
Soft or spongy feeling → Bleed the brake
system.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
4-31
REAR BRAKE
EAS22550
REAR BRAKE
Removing the rear brake pads
Order
1
2
3
4
5
6
7
Job/Parts to remove
Screw plug
Brake pad pin
Rear brake caliper
Brake pad shim
Brake pad
Bleed screw
Brake pad spring
Q’ty
1
1
1
4
2
1
1
Remarks
For installation, reverse the removal procedure.
4-32
REAR BRAKE
Removing the rear brake master cylinder
Order
Job/Parts to remove
Q’ty
Brake fluid
1
2
3
4
5
6
7
8
9
10
11
12
Footrest plate
Brake fluid reservoir cap
Rear brake fluid reservoir diaphragm holder
Rear brake fluid reservoir diaphragm
Brake fluid reservoir tank
Brake fluid reservoir hose
Hose joint
Bush
Union bolt
Copper washer
Brake hose
Brake master cylinder
Remarks
Drain.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
1
1
1
1
1
1
1
1
1
2
1
1
For installation, reverse the removal procedure.
4-33
REAR BRAKE
Disassembling the rear brake master cylinder
Order
1
2
3
4
Job/Parts to remove
Brake master cylinder kit
Hose joint
Bush
Brake master cylinder body
Q’ty
1
1
1
1
Remarks
For assembly, reverse the disassembly procedure.
4-34
REAR BRAKE
Removing the rear brake calipers
Order
Job/Parts to remove
Q’ty
Brake fluid
1
2
3
4
Union bolt
Copper washer
Brake hose
Brake caliper
Remarks
Drain.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
1
2
1
1
For installation, reverse the removal procedure.
4-35
REAR BRAKE
Disassembling the rear brake calipers
Order
1
2
3
4
5
6
7
8
Job/Parts to remove
Screw plug
Brake pad pin
Brake pad
Brake pad shim
Brake pad spring
Brake caliper piston
Brake caliper piston seal
Bleed screw
Q’ty
1
1
2
4
1
1
2
1
Remarks
For assembly, reverse the disassembly procedure.
4-36
REAR BRAKE
EAS22560
INTRODUCTION
Brake disc thickness limit
4.5 mm (0.18 in)
EWA14100
WARNING
5. Adjust:
• Brake disc deflection
Refer to "CHECKING THE FRONT BRAKE
DISCS" on page 4-24.
Disc brake components rarely require disassembly. Therefore, always follow these
preventive measures:
• Never disassemble brake components
unless absolutely necessary.
• If any connection on the hydraulic brake
system is disconnected, the entire brake
system must be disassembled, drained,
cleaned, properly filled, and bled after
reassembly.
• Never use solvents on internal brake
components.
• Use only clean or new brake fluid for
cleaning brake components.
• Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean
up any spilt brake fluid immediately.
• Avoid brake fluid coming into contact
with the eyes as it can cause serious
injury.
• FIRST AID FOR BRAKE FLUID ENTERING
THE EYES:
• Flush with water for 15 minutes and get
immediate medical attention.
Rear brake disc bolt
30 Nm (3.0 m·kg, 22 ft·lb)
LOCTITE®
6. Install:
• Rear wheel
Refer to "REAR WHEEL" on page 4-13.
EAS22580
REPLACING THE REAR BRAKE PADS
NOTE:
When replacing the brake pads, it is not necessary to disconnect the brake hose or disassemble the brake caliper.
1.
•
•
•
•
Remove :
Screw plug “1”
Brake pad pin “2”
Brake caliper “3”
Brake pad spring
EAS22570
CHECKING THE REAR BRAKE DISC
1. Remove:
• Rear wheel
Refer to "REAR WHEEL" on page 4-13.
2. Check:
• Brake disc
Damage/galling → Replace.
3. Measure:
• Brake disc deflection
Out of specification → Correct the brake
disc deflection or replace the brake disc.
Refer to "CHECKING THE FRONT BRAKE
DISCS" on page 4-24.
2. Remove :
• Brake pads “1”
(along with the brake pad shims “2”)
Brake disc deflection limit
0.15 mm (0.0059 in)
4. Measure:
• Brake disc thickness
Measure the brake disc thickness at a few
different locations.
Out of specification → Replace.
Refer to "CHECKING THE FRONT BRAKE
DISCS" on page 4-24.
4-37
REAR BRAKE
3. Measure:
• Brake pad wear limit “a”
Out of specification → Replace the brake
pads as a set.
Brake pad lining
(inner)
6.0 mm (0.24 in)
Limit
1.0 mm (0.04 in)
Brake pad lining
(outer)
6.0 mm (0.24 in)
Limit
1.0 mm (0.04 in)
c. Tighten the bleed screw.
Bleed screw
6 Nm (0.6 m·kg, 4.3 ft·lb)
d. Install a new brake pad shim “3” onto each
new brake pad “4”.
thickness
thickness
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
5.
•
•
•
Install:
Brake pad pin
Screw plug
Brake caliper
Rear brake caliper bolt (front
side)
27 Nm (2.7 m·kg, 20 ft·lb)
Rear brake caliper bolt (rear
side)
22 Nm (2.2 m·kg, 16 ft·lb)
4. Install:
• Brake pad shims
(onto the brake pads)
• Brake pads
• Brake pad spring
6. Check:
• Brake fluid level
Below the minimum level mark “a” → Add
the recommended brake fluid to the proper
level.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-23.
NOTE:
Always install new brake pads, brake pad
shims, and a brake pad spring as a set.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect a clear plastic hose “1” tightly to
the bleed screw “2”. Put the other end of
the hose into an open container.
7. Check:
• Brake pedal operation
Soft or spongy feeling → Bleed the brake
system.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
b. Loosen the bleed screw and push the
brake caliper pistons into the brake caliper
with your finger.
4-38
REAR BRAKE
• Never try to pry out the brake caliper piston.
EAS22590
REMOVING THE REAR BRAKE CALIPER
NOTE:
Before disassembling the brake caliper, drain
the brake fluid from the entire brake system.
1.
•
•
•
•
Remove:
Union bolt “1”
Copper washers “2”
Brake hose “3”
Brake caliper “4”
c. Remove the brake caliper piston seals.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS22640
CHECKING THE REAR BRAKE CALIPER
Recommended brake component
replacement schedule
Brake pads
If necessary
Piston seals
Every two years
Brake hoses
Every four years
Every two years and
Brake fluid
whenever the brake is
disassembled
NOTE:
Put the end of the brake hose into a container
and pump out the brake fluid carefully.
EAS22600
DISASSEMBLING THE REAR BRAKE CALIPER
1. Remove:
• Brake caliper piston “1”
• Brake caliper piston seals “2”
1. Check:
• Brake caliper pistons “1”
Rust/scratches/wear → Replace the brake
caliper pistons.
• Brake caliper cylinders “2”
Scratches/wear → Replace the brake caliper assembly.
• Brake caliper body “3”
Cracks/damage → Replace the brake caliper assembly.
• Brake fluid delivery passages
(brake caliper body)
Obstruction → Blow out with compressed
air.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Secure the brake caliper piston with a
piece of wood “a”
b. Blow compressed air into the brake hose
joint opening “b” to force out the piston from
the brake caliper.
EWA13550
WARNING
• Cover the brake caliper piston with a rag.
Be careful not to get injured when the piston is expelled from the brake caliper.
4-39
REAR BRAKE
EWA13610
ECA14170
CAUTION:
WARNING
Whenever a brake caliper is disassembled,
replace the brake caliper piston seals.
When installing the brake hose onto the
brake caliper “1”, make sure the brake pipe
“a” touches the projection “b” on the brake
caliper.
2. Check:
• Brake caliper bracket “1”
Cracks/damage → Replace.
2.
•
3.
•
•
•
•
•
•
EAS22650
ASSEMBLING THE REAR BRAKE CALIPER
EWA13620
WARNING
• Before installation, all internal brake components should be cleaned and lubricated
with clean or new brake fluid.
• Never use solvents on internal brake
components as they will cause the piston
seals to swell and distort.
• Whenever a brake caliper is disassembled, replace the brake caliper piston
seals.
Remove:
Brake caliper
Install:
Brake pad shims
Brake pads
Brake pad spring
Brake pad pin
Screw plug
Brake caliper
Rear brake caliper bolt (front
side)
27 Nm (2.7 m·kg, 20 ft·lb)
Rear brake caliper bolt (rear
side)
22 Nm (2.2 m·kg, 16 ft·lb)
Recommended fluid
DOT 4
4. Fill:
• Brake fluid reservoir
(with the specified amount of the recommended brake fluid)
EAS22670
INSTALLING THE REAR BRAKE CALIPER
1. Install:
• Brake caliper “1”
(temporarily)
Recommended fluid
DOT 4
• Copper washers New
• Brake hose “2”
• Union bolt “3”
EWA13090
WARNING
• Use only the designated brake fluid.
Other brake fluids may cause the rubber
seals to deteriorate, causing leakage and
poor brake performance.
• Refill with the same type of brake fluid
that is already in the system. Mixing brake
fluids may result in a harmful chemical
reaction, leading to poor brake performance.
Rear brake hose union bolt
30 Nm (3.0 m·kg, 22 ft·lb)
EWA13530
WARNING
Proper brake hose routing is essential to
insure safe vehicle operation. Refer to
"CABLE ROUTING" on page 2-39.
4-40
REAR BRAKE
• When refilling, be careful that water does
not enter the brake fluid reservoir. Water
will significantly lower the boiling point of
the brake fluid and could cause vapor
lock.
ECA13540
CAUTION:
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean
up any spilt brake fluid immediately.
5. Bleed:
• Brake system
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
6. Check:
• Brake fluid level
Below the minimum level mark “a” → Add
the recommended brake fluid to the proper
level.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-23.
NOTE:
To collect any remaining brake fluid, place a
container under the master cylinder and the
end of the brake hose.
2. Remove:
• Brake master cylinder
EAS22720
CHECKING THE REAR BRAKE MASTER
CYLINDER
1. Check:
• Brake master cylinder
Damage/scratches/wear → Replace.
• Brake fluid delivery passages
(brake master cylinder body)
Obstruction → Blow out with compressed
air.
7. Check:
• Brake pedal operation
Soft or spongy feeling → Bleed the brake
system.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
2. Check:
• Brake master cylinder kit
Damage/scratches/wear → Replace.
EAS22700
REMOVING THE REAR BRAKE MASTER
CYLINDER
1. Remove:
• Union bolt “1”
• Copper washers “2”
• Brake hose “3”
3. Check:
• Brake fluid reservoir tank “1”
Cracks/damage → Replace.
• Brake fluid reservoir diaphragm “2”
Cracks/damage → Replace.
4-41
REAR BRAKE
EWA13530
WARNING
Proper brake hose routing is essential to
insure safe vehicle operation. Refer to
"CABLE ROUTING" on page 2-39.
ECA14160
CAUTION:
When installing the brake hose onto the
brake master cylinder, make sure the brake
pipe touches the projection “a” as shown.
4. Check:
• Brake hoses “1”
Cracks/damage/wear → Replace.
2. Fill:
• Brake fluid reservoir
(to the maximum level mark “b”)
EAS22730
ASSEMBLING THE REAR BRAKE MASTER
CYLINDER
EWA13520
WARNING
• Before installation, all internal brake components should be cleaned and lubricated
with clean or new brake fluid.
• Never use solvents on internal brake
components.
Recommended fluid
DOT 4
Recommended fluid
DOT 4
1. Instal:
EWA13090
• Brake master cylinder kit New
WARNING
EAS22740
• Use only the designated brake fluid.
Other brake fluids may cause the rubber
seals to deteriorate, causing leakage and
poor brake performance.
• Refill with the same type of brake fluid
that is already in the system. Mixing brake
fluids may result in a harmful chemical
reaction, leading to poor brake performance.
INSTALLING THE REAR BRAKE MASTER
CYLINDER
1. Install:
• Copper washers New
• Brake hoses
• Union bolt
Rear brake hose union bolt
30 Nm (3.0 m·kg, 22 ft·lb)
4-42
REAR BRAKE
• When refilling, be careful that water does
not enter the brake fluid reservoir. Water
will significantly lower the boiling point of
the brake fluid and could cause vapor
lock.
ECA13540
CAUTION:
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean
up any spilt brake fluid immediately.
3. Bleed:
• Brake system
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-25.
4. Check:
• Brake fluid level
Below the minimum level mark “a” → Add
the recommended brake fluid to the proper
level.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-23.
5. Adjust:
• Brake pedal position
Refer to "ADJUSTING THE REAR DISC
BRAKE" on page 3-22.
6. Adjust:
• Rear brake light operation timing
Refer to "ADJUSTING THE REAR BRAKE
LIGHT SWITCH" on page 3-25.
4-43
HANDLEBARS
EAS22850
HANDLEBARS
Removing the handlebars
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Job/Parts to remove
Q’ty
Front cowling
Side cowling
Grip end
Handlebar grip
Clutch switch connector
Left handlebar switch
Clutch cable
Clutch lever holder
Throttle cable housing
Throttle cable
Throttle grip
Front brake light switch lead connector
Right handlebar switch
Clutch cable holder
Brake fluid reservoir tank
Brake master cylinder holder
Brake master cylinder
Steering damper
Handlebar pinch bolt
2
1
2
1
1
1
1
2
1
2
1
1
1
1
1
1
2
4-44
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Disconnect.
Disconnect.
Loosen.
HANDLEBARS
Removing the handlebars
Order
18
19
20
21
22
23
Job/Parts to remove
Upper bracket bolt
Upper bracket pinch bolt
Steering stem nut
Upper bracket
Left handlebar
Right handlebar
Q’ty
2
2
1
1
1
1
Remarks
Loosen.
Loosen.
Loosen.
For installation, reverse the removal procedure.
4-45
HANDLEBARS
EAS22870
REMOVING THE HANDLEBAR
1. Stand the vehicle on a level surface.
EWA13120
WARNING
Securely support the vehicle so that there
is no danger of it falling over.
2. Remove:
• Handlebar grip “1”
NOTE:
EAS22900
Blow compressed air between the handlebar
and the handlebar grip, and gradually push the
grip off the handlebar.
INSTALLING THE HANDLEBARS
1. Stand the vehicle on a level surface.
EWA13120
WARNING
Securely support the vehicle so that there
is no danger of it falling over.
2. Install:
• Right handlebar switch “1”
NOTE:
Align the projection “a” on the right handlebar
switch with the hole “b” on the right handlebar.
3. Remove:
• Throttle cable housing “1”
• Throttle grip “2”
NOTE:
While removing the throttle cable housing, pull
back the rubber cover “3”.
3. Install:
• Brake master cylinder holder “1”
ECA14260
CAUTION:
• Install the brake master cylinder holder
with the “UP” mark facing up.
• First, tighten the upper bolt, and then the
lower bolt.
EAS22890
NOTE:
CHECKING THE HANDLEBARS
1. Check:
• Left handlebar “1”
• Right handlebar “2”
Bends/cracks/damage → Replace.
• Align the mating surfaces of the brake master
cylinder holder with the punch mark “a” on
the right handlebar.
• There should be 2–2.5 mm (0.08–0.10 in) of
clearance between the right handlebar
switch and the brake master cylinder holder.
EWA13690
WARNING
Do not attempt to straighten a bent handlebar as this may dangerously weaken it.
Front brake master cylinder
holder bolt
13 Nm (1.3 m·kg, 9.4 ft·lb)
4-46
HANDLEBARS
4.
•
•
•
7. Install:
• Handlebar grip
Install:
Throttle grip
Throttle cable housing “1”
Throttle cables
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Apply a thin coat of rubber adhesive onto
the end of the left handlebar.
b. Slide the handlebar grip over the end of the
left handlebar.
c. Wipe off any excess rubber adhesive with a
clean rag.
NOTE:
Align the projection “a” on the throttle cable
housing with the hole “b” in the right handlebar.
EWA13700
WARNING
Do not touch the handlebar grip until the
rubber adhesive has fully dried.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
8. Adjust:
• Clutch cable free play
Refer to "ADJUSTING THE CLUTCH
CABLE FREE PLAY" on page 3-14.
5. Install:
• Clutch lever holder “1”
Clutch lever free play
10.0–15.0 mm (0.39–0.59 in)
NOTE:
Align the slit on the clutch lever holder with the
punch mark “a” on the left handlebar.
9. Adjust:
• Throttle cable free play
Refer to "ADJUSTING THE THROTTLE
CABLE FREE PLAY" on page 3-8.
Throttle cable free play
3.0–5.0 mm (0.12–0.20 in)
6. Install:
• Left handlebar switch “1”
NOTE:
Align the projection “a” on the left handlebar
switch with the hole “b” on the left handlebar.
4-47
HANDLEBARS
EAS4C81004
CHECKING THE STEERING DAMPER
1. Check:
• Steering damper body
Damage/oil leaks → Replace.
(It replace with the assembly.)
• Steering damper rod
Bends/scratch → Replace.
(It replace with the assembly.)
• Bearing
Damage/pitting → Replace.
(It replace with the assembly.)
4-48
FRONT FORK
EAS22950
FRONT FORK
Removing the front fork legs
Order
1
2
3
4
5
6
Job/Parts to remove
Q’ty
Front wheel
Front brake caliper
Side cowling
Front fender
Handlebar pinch bolt
Upper bracket pinch bolt
Cap bolt
Lower bracket pinch bolt
Front fork leg
1
1
1
1
1
1
Remarks
Refer to "FRONT WHEEL" on page 4-8.
Refer to "FRONT BRAKE" on page 4-19.
Refer to "GENERAL CHASSIS" on page 4-1.
Loosen.
Loosen.
Loosen.
Loosen.
For installation, reverse the removal procedure.
4-49
FRONT FORK
Disassembling the front fork legs
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Job/Parts to remove
Cap bolt
O-ring
Damper adjusting rod
Damper adjusting rod locknut
Washer
Spacer
Fork spring
Dust seal
Oil seal clip
Oil seal
Washer
Damper rod assembly bolt
Copper washer
Damper rod assembly
Inner tube
Outer tube
Q’ty
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Remarks
For assembly, reverse the disassembly procedure.
4-50
FRONT FORK
• Front fork leg
EAS22970
REMOVING THE FRONT FORK LEGS
The following procedure applies to both of the
front fork legs.
1. Stand the vehicle on a level surface.
EAS22990
DISASSEMBLING THE FRONT FORK LEGS
The following procedure applies to both of the
front fork legs.
1. Remove:
• Cap bolt “1”
(from the damper adjusting rod)
• Spacers “2”
• Nut “3”
EWA13120
WARNING
Securely support the vehicle so that there
is no danger of it falling over.
NOTE:
Place the vehicle on a suitable stand so that
the front wheel is elevated.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Press down on the spacer with the fork
spring compressor “4”.
b. Install the rod holder “5” between the nut
“3” and the spacer “2”.
2. Remove:
• Front wheel
Refer to "FRONT WHEEL" on page 4-8.
• Front brake caliper
Refer to "FRONT BRAKE" on page 4-19.
• Side cowlings
Refer to "GENERAL CHASSIS" on page 41.
3. Loosen:
• Handlebar pinch bolt “1”
• Upper bracket pinch bolts “2”
• Cap bolt “3”
• Lower bracket pinch bolts “4”
Fork spring compressor
90890-01441
YM-01441
Rod holder
90890-01434
Damper rod holder double
ended
YM-01434
NOTE:
Use the side of the rod holder that is marked
“A”.
EWA13640
WARNING
Before loosening the upper and lower
bracket pinch bolts, support the front fork
leg.
c. Hold the spring preload adjusting bolt “6”
and loosen the nut “3”.
d. Remove the cap bolt.
e. Remove the rod holder and fork spring
compressor.
f. Remove the spacer and nut.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Drain:
• Fork oil
NOTE:
Stroke the damper rod “1” several times while
draining the fork oil.
4. Remove:
4-51
FRONT FORK
1. Check:
• Inner tube “1”
• Outer tube “2”
Bends/damage/scratches → Replace.
EWA13650
WARNING
Do not attempt to straighten a bent inner
tube as this may dangerously weaken it.
3. Remove:
• Dust seal
• Oil seal clip “1”
(with a flat-head screwdriver)
• Oil seal
• Washer
2. Measure:
• Spring free length “a”
Out of specification → Replace.
Fork spring free length
237.5 mm (9.35 in)
Limit
232.8 mm (9.17 in)
4. Remove:
• Damper rod assembly bolt
• Damper rod assembly
NOTE:
While holding the damper rod with the damper
rod holder “1”, loosen the damper rod assembly bolt.
Damper rod holder
90890-01423
Damping rod holder
YM-01423
3. Check:
• Damper rod assembly “1”
Damage/wear → Replace.
Obstruction → Blow out all of the oil passages with compressed air.
• Damper adjusting rod
Bends/damage → Replace.
ECA14200
CAUTION:
• The front fork leg has a built-in damper
adjusting rod and a very sophisticated
internal construction, which are particularly sensitive to foreign material.
• When disassembling and assembling the
front fork leg, do not allow any foreign
material to enter the front fork.
EAS23010
CHECKING THE FRONT FORK LEGS
The following procedure applies to both of the
front fork legs.
4-52
FRONT FORK
4. Check:
• Cap bolt O-ring “1”
Damage/wear → Replace.
2. Lubricate:
• Inner tube’s outer surface
Recommended oil
Suspension oil 01 or equivalent
3. Tighten:
• Damper rod assembly bolt “1”
Damper rod assembly bolt
23 Nm (2.3 m·kg, 17 ft·lb)
LOCTITE®
EAS23040
ASSEMBLING THE FRONT FORK LEGS
The following procedure applies to both of the
front fork legs.
NOTE:
While holding the damper rod assembly with
the damper rod holder “2”, tighten the damper
rod assembly bolt.
EWA13660
WARNING
• Make sure the oil levels in both front fork
legs are equal.
• Uneven oil levels can result in poor handling and a loss of stability.
Damper rod holder
90890-01423
Damping rod holder
YM-01423
NOTE:
• When assembling the front fork leg, be sure
to replace the following parts:
- Outer tube bushing
- Oil seal
- Dust seal
• Before assembling the front fork leg, make
sure all of the components are clean.
1.
•
•
•
Install:
Damper rod assembly “1”
Inner tube “2”
Damper rod assembly bolt
• Cooper washer New
EWA4C81002
WARNING
Always use new copper washer.
ECA14210
CAUTION:
Allow the damper rod assembly to slide
slowly down the inner tube “2” until it protrudes from the bottom of the inner tube.
Be careful not to damage the inner tube.
4. Install:
• Dust seal “1”
4-53
FRONT FORK
• Oil seal clip “2”
• Oil seal “3”
• Washer “4”
ECA14220
CAUTION:
Make sure the numbered side of the oil seal
faces up.
NOTE:
• Before installing the oil seal, lubricate its lips
with lithium-soap-based grease.
• Lubricate the outer surface of the inner tube
with fork oil.
• Before installing the oil seal, cover the top of
the front fork leg with a plastic bag to protect
the oil seal during installation.
6. Install:
• Oil seal clip “1”
NOTE:
Adjust the oil seal clip so that it fits into the
outer tube’s groove.
7. Install:
• Dust seal “1”
(with the fork seal driver “2”)
Fork seal driver
90890-01442
Adjustable fork seal driver (36–
46 mm)
YM-01442
5. Install:
• Washer
• Oil seal “1”
(with the fork seal driver “2”)
Fork seal driver
90890-01442
Adjustable fork seal driver (36–
46 mm)
YM-01442
8. Install:
• Rod puller “1”
• Rod puller attachment “2”
(onto the damper rod “3”)
4-54
FRONT FORK
Rod puller
90890-01437
Universal damping rod bleeding
tool set
YM-A8703
Rod puller attachment (M12)
90890-01435
Universal damping rod bleeding
tool set
YM-A8703
11. Before measuring the fork oil level, wait ten
minutes until the oil has settled and the air
bubbles have dispersed.
NOTE:
Be sure to bleed the front fork leg of any residual air.
12. Measure:
• Front fork leg oil level “a”
Out of specification → Correct.
Level
101.0 mm (3.98 in)
9. Fill:
• Front fork leg
(with the specified amount of the recommended fork oil)
Quantity
513.0 cm³ (17.34 US oz) (18.09
Imp.oz)
Recommended oil
Suspension oil 01
ECA14230
CAUTION:
• Be sure to use the recommended fork oil.
Other oils may have an adverse effect on
front fork performance.
• When disassembling and assembling the
front fork leg, do not allow any foreign
material to enter the front fork.
13. Install:
• Damper adjusting rod locknut “1”
• Fork spring “2”
• Spacer “3”
• Damper adjusting rod “4”
• Cap bolt “5”
10. After filling the front fork leg, slowly stroke
the damper rod “1” up and down (at least
ten times) to distribute the fork oil.
NOTE:
Be sure to stroke the damper rod slowly
because the fork oil may spurt out.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
4-55
FRONT FORK
a. Remove the rod puller attachment.
b. Install the nut.
c. Install the fork spring and spacer.
NOTE:
Install the spring with the smaller pitch “a” facing up “A”.
g. Remove the rod puller and the rod puller
attachment.
h. Install the nut “1” and position it as specified “b”.
Distance “b”
11 mm (0.43 in)
d. Reinstall the rod puller attachment
e. Press down in the spacer with the fork
spring compressor “1”
f. Pull up the rod puller and install the rod
holder “2” between the damper adjusting
rod locknut “3” and the spacer “4”.
NOTE:
Use the side of the rod holder that is marked
“A”.
Rod puller
90890-01437
Universal damping rod bleeding
tool set
YM-A8703
Rod puller attachment (M12)
90890-01435
Universal damping rod bleeding
tool set
YM-A8703
Fork spring compressor
90890-01441
YM-01441
Rod holder
90890-01434
Damper rod holder double
ended
YM-01434
i.
Set the cap bolt distance “c” to specification.
Distance “c”
13 mm (0.51 in)
j.
Install the damper adjusting rod and cap
bolt, and then finger tighten the cap bolt.
k. Hold the cap bolt and tighten the damper
adjusting rod locknut to specification.
Damper adjusting rod locknut
29 Nm (2.9 m·kg, 21 ft·lb)
l.
4-56
Remove the rod holder and fork spring
compressor.
FRONT FORK
EWA4C81003
WARNING
• The fork spring is compressed.
• Always use a new cap bolt O-ring.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS23050
INSTALLING THE FRONT FORK LEGS
The following procedure applies to both of the
front fork legs.
1. Install:
• Front fork leg
Temporarily tighten the upper and lower
bracket pinch bolts.
2. Tighten:
• Lower bracket pinch bolt “1”
3.
•
•
•
Lower bracket pinch bolt
23 Nm (2.3 m·kg, 17 ft·lb)
• Cap bolt “2”
Cap bolt
23 Nm (2.3 m·kg, 17 ft·lb)
• Handlebar pinch bolt “3”
Handlebar pinch bolt
17 Nm (1.7 m·kg, 12 ft·lb)
• Upper bracket pinch bolt “4”
Upper bracket pinch bolt
26 Nm (2.6 m·kg, 19 ft·lb)
EWA13680
WARNING
Make sure the brake hoses are routed properly.
4-57
Adjust:
Spring preload
Rebound damping
Compression damping
Refer to "ADJUSTING THE FRONT FORK
LEGS" on page 3-30.
STEERING HEAD
EAS23090
STEERING HEAD
Removing the lower bracket
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Job/Parts to remove
Front cowling
Side cowling
Front wheel
Front fork legs
Handlebar
Main switch lead coupler
Upper bracket bolt
Left handlebar assembly
Right handlebar assembly
Steering stem nut
Upper bracket
Front brake hose joint
Horn lead connector
Horn
Horn bracket
Lower bracket cover
Lock washer
Upper ring nut
Rubber washer
Lower ring nut
Lower bracket
Q’ty
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4-58
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "FRONT WHEEL" on page 4-8.
Refer to "FRONT BRAKE" on page 4-19.
Refer to "HANDLEBARS" on page 4-44.
Disconnect.
Disconnect.
STEERING HEAD
Removing the lower bracket
Order
17
18
19
20
21
22
Job/Parts to remove
Bearing cover
Bearing inner race
Upper bearing
Lower bearing
Dust seal
Bearing outer race
Q’ty
1
2
1
1
1
2
Remarks
For installation, reverse the removal procedure.
4-59
STEERING HEAD
3. Replace:
• Bearings
• Bearing races
EAS23110
REMOVING THE LOWER BRACKET
1. Stand the vehicle on a level surface.
EWA13120
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
WARNING
a. Remove the bearing races “1” from the
steering head pipe with a long rod “2” and
hammer.
b. Remove the bearing race “3” from the lower
bracket with a floor chisel “4” and hammer.
c. Install a new dust seal and new bearing
races.
Securely support the vehicle so that there
is no danger of it falling over.
2. Remove:
• Upper ring nut “1”
(with the steering nut wrench “2”)
Steering nut wrench
90890-01403
Spanner wrench
YU-33975
ECA14270
CAUTION:
If the bearing race is not installed properly,
the steering head pipe could be damaged.
EWA13730
NOTE:
WARNING
• Always replace the bearings and bearing
races as a set.
• Whenever the steering head is disassembled, replace the rubber seal.
Securely support the lower bracket so that
there is no danger of it falling.
EAS23130
CHECKING THE STEERING HEAD
1. Wash:
• Bearings
• Bearing races
Recommended cleaning solvent
Kerosene
2. Check:
• Bearings “1”
• Bearing races “2”
Damage/pitting → Replace.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
4. Check:
• Upper bracket
• Lower bracket
(along with the steering stem)
Bends/cracks/damage → Replace.
EAS23140
INSTALLING THE STEERING HEAD
1. Lubricate:
• Upper bearing
4-60
STEERING HEAD
• Lower bearing
• Bearing races
Recommended lubricant
Lithium-soap-based grease
2.
•
•
•
•
Install:
Lower ring nut “1”
Rubber washer “2”
Upper ring nut “3”
Lock washer “4”
Refer to "CHECKING AND ADJUSTING
THE STEERING HEAD" on page 3-28.
3. Install:
• Upper bracket
• Steering stem nut
NOTE:
Temporarily tighten the steering stem nut.
4. Install:
• Front fork legs
Refer to "INSTALLING THE FRONT FORK
LEGS" on page 4-57.
NOTE:
Temporarily tighten the upper and lower
bracket pinch bolts.
4-61
REAR SHOCK ABSORBER ASSEMBLY
EAS23160
REAR SHOCK ABSORBER ASSEMBLY
Removing the rear shock absorber assembly
Order
1
2
3
4
5
6
7
8
9
10
11
Job/Parts to remove
Rider seat
Passenger seat
Fuel tank
Self-locking nut/bolt
Self-locking nut/bolt
Self-locking nut/bolt
Self-locking nut
Rear shock absorber assembly
Oil seal/bearing/collar
Collar/self-locking nut/bolt
Connecting arm
Oil seal/bearing/collar
Catalytic converter pipe stay
Relay arm
Q’ty
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "FUEL TANK" on page 7-1.
1/1
1/1
1/1/1
1
1
4/3/4
1/1/1
1
2/1/1
1
1
For installation, reverse the removal procedure.
4-62
REAR SHOCK ABSORBER ASSEMBLY
2. Remove:
• Rear shock absorber assembly lower bolt
“1”
• Relay arm-to-swingarm bolt “2”
EAS23180
HANDLING THE REAR SHOCK ABSORBER
EWA13740
WARNING
This rear shock absorber contains highly
compressed nitrogen gas. Before handling
the rear shock absorber, read and make
sure you understand the following information. The manufacturer cannot be held
responsible for property damage or personal injury that may result from improper
handling of the rear shock absorber.
• Do not tamper or attempt to open the rear
shock absorber.
• Do not subject the rear shock absorber to
an open flame or any other source of high
heat. High heat can cause an explosion
due to excessive gas pressure.
• Do not deform or damage the rear shock
absorber in any way. Rear shock absorber
damage will result in poor damping performance.
NOTE:
While removing the rear shock absorber
assembly lower bolt, hold the swingarm so that
it does not drop down.
3. Remove:
• Rear shock absorber upper bracket nut “1”
• Rear shock absorber assembly
EAS23190
NOTE:
DISPOSING OF A REAR SHOCK
ABSORBER
1. Gas pressure must be released before disposing of a rear shock absorber. To release
the gas pressure, drill a 2–3-mm hole
through the rear shock absorber at a point
15–20 mm from its end as shown.
Lower the swingarm, and the remove the rear
shock absorber assembly from between the
swingarm and frame.
EWA13760
WARNING
Wear eye protection to prevent eye damage
from released gas or metal chips.
EAS23240
CHECKING THE REAR SHOCK ABSORBER
ASSEMBLY
1. Check:
• Rear shock absorber rod
Bends/damage → Replace the rear shock
absorber assembly.
• Rear shock absorber
Gas leaks/oil leaks → Replace the rear
shock absorber assembly.
• Spring
Damage/wear → Replace the rear shock
absorber assembly.
• Bushings
Damage/wear → Replace.
EAS23230
REMOVING THE REAR SHOCK ABSORBER
ASSEMBLY
1. Stand the vehicle on a level surface.
EWA13120
WARNING
Securely support the vehicle so that there
is no danger of it falling over.
NOTE:
Place the vehicle on a suitable stand so that
the rear wheel is elevated.
4-63
REAR SHOCK ABSORBER ASSEMBLY
• Dust seals
Damage/wear → Replace.
• Bolts
Bends/damage/wear → Replace.
Installed depth “a”
1.0 mm (0.04 in)
Installed depth “b”
4.0 mm (0.16 in)
EAS23260
A. Left side
B. Right side
CHECKING THE CONNECTING ARM AND
RELAY ARM
1. Check:
• Connecting arm “1”
• Relay arm “2”
Damage/wear → Replace.
EAS23310
INSTALLING THE REAR SHOCK
ABSORBER ASSEMBLY
1. Lubricate:
• Collars
• Bearings
Recommended lubricant
Molybdenum disulfide grease
2. Install:
• Rear shock absorber assembly
NOTE:
Install the connecting arm front bolt from the
left.
2. Check:
• Bearings
• Oil seals
Damage/pitting → Replace.
3. Check:
• Collars
Damage/scratches → Replace.
3. Tighten:
• Rear shock absorber upper bracket nut
Rear shock absorber upper
bracket nut
92 Nm (9.2 m·kg, 67 ft·lb)
EAS23270
INSTALLING THE RELAY ARM
1. Lubricate:
• Collars
• Bearings
• Rear shock absorber assembly lower nut
Rear shock absorber assembly
lower nut
44 Nm (4.4 m·kg, 32 ft·lb)
Recommended lubricant
Lithium soap base grease
• Relay-arm-to-swingarm nut
Relay-arm-to-swingarm nut
44 Nm (4.4 m·kg, 32 ft·lb)
2. Install:
• Bearing “1”
• Oil seals “2”
(to the relay arm)
• Relay arm “3”
• Connecting arm “4”
4-64
SWINGARM
EAS23330
SWINGARM
Removing the swingarm
Order
Job/Parts to remove
Q’ty
Rear wheel
Rear shock absorber assembly
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Drive sprocket
Right footrest bracket
Drive chain adjusting bolt/locknut
Drive chain guard
Rear fender
Brake hose holder
Pivot shaft nut/washer
Pivot shaft ring nut/washer
Pivot shaft
Swingarm
Drive chain
Dust cover
Washer
Drive chain guide
Spacer
Bearing
1
2/2
1
1
1
1/1
1/1
1
1
1
2
1
1
1
2
4-65
Remarks
Refer to "REAR WHEEL" on page 4-13.
Refer to "REAR SHOCK ABSORBER
ASSEMBLY" on page 4-62.
Refer to "ENGINE REMOVAL" on page 5-1.
SWINGARM
Removing the swingarm
Order
Job/Parts to remove
Q’ty
4-66
Remarks
For installation, reverse the removal procedure.
SWINGARM
EAS23350
REMOVING THE SWINGARM
1. Stand the vehicle on a level surface.
Swingarm side play (at the end
of the swingarm)
1.0 mm (0.04 in)
EWA13120
WARNING
d. Check the swingarm vertical movement “B”
by moving the swingarm up and down.
If swingarm vertical movement is not
smooth or if there is binding, check the
spacers, bearings, washers, and dust covers.
Securely support the vehicle so that there
is no danger of it falling over.
NOTE:
Place the vehicle on a suitable stand so that
the rear wheel is elevated.
2.
•
•
•
Remove:
Relay arm-to-swingarm bolt “1”
Connecting arm bolt “2”
Rear shock absorber assembly lower bolt
“3”
NOTE:
When removing the rear shock absorber
assembly lower bolt, hold the swingarm so that
it does not drop down.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
4. Remove:
• Drive chain
Refer to "REMOVING THE DRIVE CHAIN"
on page 4-71.
5. Remove:
• Pivot shaft nut
• Swingarm pivot shaft ring nut “1”
NOTE:
Loosen the swingarm pivot shaft ring nut with
the ring nut wrench “2”.
3. Measure:
• Swingarm side play
• Swingarm vertical movement
Ring nut wrench
90890-01507
YM-01507
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Measure the tightening torque of the pivot
shaft nut, pivot shaft ring nut, and pivot
shaft.
Pivot shaft nut
105 Nm (10.5 m·kg, 76 ft·lb)
Pivot shaft ring nut
65 Nm (6.5 m·kg, 47 ft·lb)
Pivot shaft
7 Nm (0.7 m·kg, 5.1 ft·lb)
b. Measure the swingarm side play “A” by
moving the swingarm from side to side.
c. If the swingarm side play is out of specification, check the spacers, bearings, washers,
and dust covers.
6. Remove:
• Swingarm pivot shaft “1”
4-67
SWINGARM
• Washers
• Bearings
NOTE:
Loosen the swingarm pivot shaft with the
damper rod holder (22 mm) “2”.
Recommended cleaning solvent
Kerosene
Damper rod holder (22 mm)
90890-01365
4.
•
•
•
Check:
Dust covers “1”
Spacer “2”
Washer “3”
Damage/wear → Replace.
• Bearings “4”
Damage/pitting → Replace.
EAS23360
CHECKING THE SWINGARM
1. Check:
• Swingarm
Bends/cracks/damage → Replace.
EAS23380
INSTALLING THE SWINGARM
1. Lubricate:
• Bearings
• Spacers
• Dust covers
• Pivot shaft
Recommended lubricant
Molybdenum disulfide grease
2. Check:
• Pivot shaft
Roll the pivot shaft on a flat surface.
Bends → Replace.
2.
•
•
•
EWA13770
WARNING
Do not attempt to straighten a bent pivot
shaft.
3.
•
•
•
Install:
Bearing “1”
Bearing “2”
Washer “3”
Installed depth of bearing “a”
0–1.0 mm (0–0.04 in)
Wash:
Pivot shaft
Dust covers
Spacer
4. Dust cover
4-68
SWINGARM
5.
6.
A.
B.
Swingarm
Pivot shaft
Left side
Right side
3. Install:
• Pivot shaft “1”
Pivot shaft
7 Nm (0.7 m·kg, 5.1 ft·lb)
NOTE:
5. Install:
• Pivot shaft nut “1”
Tighten the pivot shaft with the damper rod
holder (22 mm) “2”.
Pivot shaft nut
105 Nm (10.5 m·kg, 76 ft·lb)
Damper rod holder (22 mm)
90890-01365
NOTE:
Lubricant the pivot shaft nut threads and mating surfaces with lithium-soap-based grease.
4. Install:
• Pivot shaft ring nut “1”
Pivot shaft ring nut
65 Nm (6.5 m·kg, 47 ft·lb)
6. Adjust:
• Drive chain slack
Refer to "ADJUSTING THE DRIVE CHAIN
SLACK" on page 3-27.
NOTE:
• Lubricate the pivot ring nut threads and mating surfaces with lithium-soap-based grease.
• Tighten the pivot shaft ring nut with the ring
nut wrench “2”.
Drive chain slack
30.0–40.0 mm (1.18–1.57 in)
Ring nut wrench
90890-01507
YM-01507
4-69
CHAIN DRIVE
EAS23400
CHAIN DRIVE
Removing the drive chain
Order
1
2
Job/Parts to remove
Swingarm
Drive chain guard
Drive chain
Q’ty
Remarks
Refer to "SWINGARM" on page 4-65.
1
1
For installation, reverse the removal procedure.
4-70
CHAIN DRIVE
EAS23410
REMOVING THE DRIVE CHAIN
1. Stand the vehicle on a level surface.
EWA13120
WARNING
Securely support the vehicle so that there
is no danger of it falling over.
NOTE:
2. Check:
• Drive chain
Stiffness → Clean and lubricate or replace.
Place the vehicle on a suitable stand so that
the rear wheel is elevated.
2. Remove:
• Drive chain
(with the drive chain cutter)
EAS23440
CHECKING THE DRIVE CHAIN
1. Measure:
• Measure the dimension between 15-links
on the inner side “a” and outer side “b” of
the roller and calculate the dimension
between pin centers.
• Dimension “c” between pin centers = (Inner
dimension “a” + Outer dimension “b”)/2
• 15-link section “c” of the drive chain
Out of specification → Replace the drive
chain, front drive sprocket and rear drive
sprocket as a set.
3. Clean:
• Drive chain
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Wipe the drive chain with a clean cloth.
b. Put the drive chain in kerosene and remove
any remaining dirt.
c. Remove the drive chain from the kerosene
and completely dry it.
15-link length limit
239.3 mm (9.42 in)
ECA4C81003
CAUTION:
NOTE:
• This vehicle has a drive chain with small
rubber O-rings “1” between the drive
chain side plates. Never use high-pressure water or air, steam, gasoline, certain
solvents (e.g., benzine), or a coarse brush
to clean the drive chain. High-pressure
methods could force dirt or water into the
drive chain’s internals, and solvents will
deteriorate the O-rings. A coarse brush
can also damage the O-rings. Therefore,
use only kerosene to clean the drive
chain.
• Do not soak the drive chain in kerosene
for more than ten minutes, otherwise the
O-rings can be damaged.
• While measuring the 15-link section, push
down on the drive chain to increase its tension.
• Perform this measurement at two or three different places.
4-71
CHAIN DRIVE
b. Correct
1. Drive chain roller
2. Drive chain sprocket
EAS23470
CHECKING THE REAR WHEEL SPROCKET
Refer to "CHECKING AND REPLACING THE
REAR WHEEL SPROCKET" on page 4-17
EAS23480
CHECKING THE REAR WHEEL DRIVE HUB
Refer to "CHECKING THE REAR WHEEL
DRIVE HUB" on page 4-17
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
4. Check:
• O-rings “1”
Damage → Replace the drive chain.
• Drive chain rollers “2”
Damage/wear → Replace the drive chain.
• Drive chain side plates “3”
Damage/wear/cracks → Replace the drive
chain.
EAS23490
INSTALLING THE DRIVE CHAIN
1. Lubricate:
• Drive chain
Recommended lubricant
Engine oil or chain lubricant
suitable for O-ring chains
2.
•
•
•
•
Install:
Drive chain “1”
Drive sprocket “2”
Washer
Drive sprocket nut “3”
Drive sprocket nut
100 Nm (10 m·kg, 72 ft·lb)
NOTE:
While applying the rear brake, tighten the drive
sprocket nut.
5. Lubricate:
• Drive chain
Recommended lubricant
Engine oil or chain lubricant
suitable for O-ring chains
6. Check:
• Drive sprocket
• Rear wheel sprocket
More than 1/4 tooth “a” wear → Replace
the drive chain sprockets as a set.
Bent teeth → Replace the drive chain
sprockets as a set.
4-72
CHAIN DRIVE
ECA14300
CAUTION:
Never install a new drive chain onto worn
drive chain sprockets; this will dramatically
shorten the drive chain’s life.
3. Adjust:
• Drive chain slack
Refer to "ADJUSTING THE DRIVE CHAIN
SLACK" on page 3-27
Drive chain slack
30.0–40.0 mm (1.18–1.57 in)
ECA13550
CAUTION:
A drive chain that is too tight will overload
the engine and other vital parts, and one
that is too loose can skip and damage the
swingarm or cause an accident. Therefore,
keep the drive chain slack within the specified limits.
4-73
ENGINE
ENGINE REMOVAL ......................................................................................5-1
INSTALLING THE ENGINE ....................................................................5-7
CAMSHAFTS................................................................................................5-9
REMOVING THE CAMSHAFTS ...........................................................5-11
CHECKING THE CAMSHAFTS ...........................................................5-12
CHECKING THE TIMING CHAIN AND CAMSHAFT SPROCKET.......5-13
CHECKING THE TIMING CHAIN GUIDES ..........................................5-13
CHECKING THE TIMING CHAIN TENSIONER ...................................5-13
INSTALLING THE CAMSHAFTS ..........................................................5-15
CYLINDER HEAD.......................................................................................5-18
REMOVING THE CYLINDER HEAD ....................................................5-19
CHECKING THE CYLINDER HEAD ....................................................5-19
INSTALLING THE CYLINDER HEAD ...................................................5-19
VALVES AND VALVE SPRINGS ................................................................5-21
REMOVING THE VALVES ....................................................................5-23
CHECKING THE VALVES AND VALVE GUIDES .................................5-23
CHECKING THE VALVE SEATS ..........................................................5-25
CHECKING THE VALVE SPRINGS......................................................5-27
CHECKING THE VALVE LIFTERS .......................................................5-28
INSTALLING THE VALVES...................................................................5-28
GENERATOR..............................................................................................5-30
REMOVING THE GENERATOR ...........................................................5-32
INSTALLING THE GENERATOR ..........................................................5-32
STARTER CLUTCH ....................................................................................5-34
REMOVING THE STARTER CLUTCH .................................................5-35
CHECKING THE DAMPER ..................................................................5-35
CHECKING THE STARTER CLUTCH..................................................5-35
INSTALLING THE STARTER CLUTCH ................................................5-36
CRANKSHAFT POSITION SENSOR .........................................................5-37
REMOVING THE CRANKSHAFT POSITION SENSOR ......................5-38
INSTALLING THE CRANKSHAFT POSITION SENSOR .....................5-38
ELECTRIC STARTER.................................................................................5-39
CHECKING THE STARTER MOTOR ...................................................5-41
ASSEMBLING THE STARTER MOTOR ...............................................5-42
INSTALLING THE STARTER MOTOR..................................................5-43
CLUTCH......................................................................................................5-44
REMOVING THE CLUTCH...................................................................5-47
CHECKING THE FRICTION PLATES ..................................................5-48
5
CHECKING THE CLUTCH PLATES.....................................................5-48
CHECKING THE CLUTCH SPRINGS ..................................................5-49
CHECKING THE CLUTCH HOUSING .................................................5-49
CHECKING THE CLUTCH BOSS ........................................................5-49
CHECKING THE PRESSUR PLATE 2 .................................................5-50
CHECKING THE PRESSURE PLATE 1 ...............................................5-50
CHECKING THE PUSH LEVER SHAFT AND PUSH ROD..................5-50
INSTALLING THE CLUTCH..................................................................5-50
SHIFT SHAFT .............................................................................................5-54
REMOVING THE SHIFT SHAFT ..........................................................5-55
CHECKING THE SHIFT SHAFT ..........................................................5-55
CHECKING THE STOPPER LEVER....................................................5-55
INSTALLING THE SHIFT SHAFT .........................................................5-55
OIL PUMP ...................................................................................................5-57
REMOVING THE OIL PAN ...................................................................5-60
CHECKING THE SPROCKET AND CHAIN .........................................5-60
CHECKING THE OIL PUMP ................................................................5-60
CHECKING THE RELIEF VALVE .........................................................5-61
CHECKING THE OIL DELIVERY PIPES..............................................5-61
CHECKING THE OIL STRAINER.........................................................5-61
CHECKING THE OIL NOZZLES ..........................................................5-61
ASSEMBLING THE OIL PUMP ............................................................5-62
INSTALLING THE OIL/WATER PUMP ASSEMBLY..............................5-62
INSTALLING THE OIL PAN ..................................................................5-63
CRANKCASE .............................................................................................5-65
DISASSEMBLING THE CRANKCASE .................................................5-67
CHECKING THE CRANKCASE ...........................................................5-67
CHECKING THE BEARING AND OIL SEALS .....................................5-67
ASSEMBLING THE CRANKCASE .......................................................5-67
CRANKSHAFT ...........................................................................................5-69
REMOVING THE CONNECTING RODS AND PISTONS.....................5-71
REMOVING THE CRANKSHAFT ASSEMBLY .....................................5-71
CHECKING THE CYLINDER AND PISTON.........................................5-72
CHECKING THE PISTON RINGS ........................................................5-72
CHECKING THE PISTON PIN .............................................................5-73
CHECKING THE BIG END BEARINGS ...............................................5-74
INSTALLING THE CONNECTING ROD AND PISTON ........................5-77
CHECKING THE CRANKSHAFT .........................................................5-80
CHECKING THE CRANKSHAFT DRIVE SPROCKET.........................5-80
CHECKING THE CRANKSHAFT JOURNAL BEARINGS ....................5-80
INSTALLING THE CRANKSHAFT........................................................5-82
TRANSMISSION.........................................................................................5-84
REMOVING THE TRANSMISSION ......................................................5-89
CHECKING THE SHIFT FORKS ..........................................................5-89
CHECKING THE SHIFT DRUM ASSEMBLY........................................5-90
CHECKING THE TRANSMISSION ......................................................5-90
INSTALLING THE TRANSMISSION.....................................................5-91
ENGINE REMOVAL
EAS23710
ENGINE REMOVAL
Removing the drive sprocket
Order
Job/Parts to remove
Lower cowlings
Q’ty
Drive chain
1
2
3
4
5
6
7
8
Locknut
Shift rod
Sift arm
Drive sprocket cover
Drive sprocket nut
Lock washer
Drive sprocket
Plate
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Loosen.
Refer to "ADJUSTING THE DRIVE CHAIN
SLACK" on page 3-27.
2
1
1
1
1
1
1
1
For installation, reverse the removal procedure.
5-1
ENGINE REMOVAL
Removing the exhaust pipe
Order
8
Job/Parts to remove
Rider seat
Passenger seat
Side cowlings
Lower cowlings
Right footrest bracket
Protector cover
Protector
EXUP valve pulley cover
EXUP cable
EXUP servo motor bracket
EXUP servo motor
O2 sensor
9
10
11
12
13
14
15
16
17
Muffler cover
Muffler
Gasket
Catalyst pipe assembly
Gasket
Exhaust valve pipe assembly
Exhaust valve pipe gasket
Exhaust pipe assembly
Exhaust pipe gasket
1
2
3
4
5
6
7
Q’ty
1
1
1
1
2
1
1
1
2
2
2
1
1
1
1
1
4
5-2
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
ENGINE REMOVAL
Removing the exhaust pipe
Order
Job/Parts to remove
Q’ty
5-3
Remarks
For installation, reverse the removal procedure.
ENGINE REMOVAL
Disassembling the exhaust valve pipe
Order
1
2
3
4
5
6
7
8
9
10
11
Job/Parts to remove
Washer
Pulley
Collar
Plate
Spring
EXUP pulley bracket
Housing
Gasket
Collar
Shaft arm
Exhaust valve pipe
Q’ty
1
1
1
1
1
1
1
1
1
1
1
Remarks
For assembly, reverse the disassembly procedure.
5-4
ENGINE REMOVAL
Disconnecting the leads and hoses
Order
Job/Parts to remove
Q’ty
Fuel tank
Air filter case
Throttle body
Engine oil
Oil cooler
Air cut-off valve
Starter motor
1
2
3
4
5
6
7
8
9
10
Battery negative lead
Battery positive lead
Clutch cable
Engine ground lead
Stator coil assembly coupler
Crankshaft position sensor coupler
Oil level switch connector
Neutral switch connector
Speed sensor coupler
Cylinder identification sensor coupler
1
1
1
2
1
1
1
1
1
1
5-5
Remarks
Refer to "FUEL TANK" on page 7-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "THROTTLE BODIES" on page 7-4.
Drain.
Refer to "CHANGING THE ENGINE OIL" on
page 3-11.
Refer to "OIL COOLER" on page 6-4.
Refer to "AIR INDUCTION SYSTEM" on
page 7-9.
Refer to "ELECTRIC STARTER" on page 539.
Disconnect.
Disconnect.
Disconnect.
Disconnect.
Disconnect.
Disconnect.
For installation, reverse the removal procedure.
ENGINE REMOVAL
Removing the engine
Order
1
2
3
4
5
6
7
8
9
10
11
Job/Parts to remove
Engine mounting bolt (front right side)
Engine mount collar (outer)
Engine mount collar (center)
Engine mount collar (inner)
Engine mounting bolt (front left side)
Locknut
Engine mounting bolt (rear lower side)
Locknut
Engine mounting bolt (rear upper side)
Engine mounting adjust bolt
Engine
Q’ty
1
1
1
1
1
1
1
1
1
2
1
Remarks
For installation, reverse the removal procedure.
5-6
ENGINE REMOVAL
EAS23720
INSTALLING THE ENGINE
1. Install:
• Engine mounting adjust bolts
(temporary tighten)
2. Install:
• Engine
3. Install:
• Engine mounting bolt (rear lower side) “1”
• Engine mounting bolt (rear upper side) “2”
• Locknuts
6. Tighten:
• Engine mounting adjust bolts
NOTE:
Lubricate the lower and upper engine mounting bolts threads with lithium-soap-based
grease.
Engine mounting adjust bolt
7 Nm (0.7 m·kg, 5.1 ft·lb)
NOTE:
Use the pivot shaft wrench “1” and pivot shaft
wrench adapter “2” to tighten the engine
mounting adjust bolts.
4. Install:
• Engine mount bolt (front left side) “1”
(temporary tighten)
Pivot shaft wrench
90890-01471
YM-01471
Pivot shaft wrench adapter
90890-01476
5.
•
•
•
•
Install:
Engine mount collar (inner) “1”
Engine mount collar (center) “2”
Engine mount collar (outer) “3”
Right front engine mount bolt “4”
(temporary tighten)
7. Tighten:
• Upper locknut “1”
• Lower locknut “2”
5-7
ENGINE REMOVAL
Upper locknut
51 Nm (5.1 m·kg, 37 ft·lb)
Lower locknut
51 Nm (5.1 m·kg, 37 ft·lb)
Engine mounting bolt (front
right side)
45 Nm (4.5 m·kg, 33 ft·lb)
NOTE:
First tighten the lower locknut, and then tighten
the upper locknut.
8. Tighten:
• Left front engine mounting bolt “1”
Engine mounting bolt (front left
side)
45 Nm (4.5 m·kg, 33 ft·lb)
9. Tighten:
• Right front engine mounting bolt “1”
5-8
CAMSHAFTS
EAS23760
CAMSHAFTS
Removing the cylinder head cover
Order
Job/Parts to remove
Fuel tank
Side cowlings
Lower cowlings
Throttle body
Radiator assembly
Q’ty
Air cut-off valve
1
2
3
4
5
6
7
Ignition coil
Spark plug
Cylinder head cover
Cylinder head cover gasket
Timing chain guide (top side)
Cylinder identification sensor
O-ring
Remarks
Refer to "FUEL TANK" on page 7-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "THROTTLE BODIES" on page 7-4.
Refer to "RADIATOR" on page 6-1.
Refer to "AIR INDUCTION SYSTEM" on
page 7-9.
4
4
1
1
1
1
1
For installation, reverse the removal procedure.
5-9
CAMSHAFTS
Removing the camshafts
Order
Job/Parts to remove
Q’ty
Pickup rotor cover
1
2
3
4
5
6
7
8
9
10
Camshaft sprocket bolt
Timing chain tensioner
Timing chain tensioner gasket
Intake camshaft cap
Dowel pin
Exhaust camshaft cap
Dowel pin
Intake camshaft
Exhaust camshaft
Camshaft sprocket
4
1
1
3
6
3
6
1
1
2
Remarks
Refer to "CRANKSHAFT POSITION SENSOR" on page 5-37.
Loosen.
For installation, reverse the removal procedure.
5-10
CAMSHAFTS
EAS23810
REMOVING THE CAMSHAFTS
1. Remove:
• Pickup rotor cover
Refer to "CRANKSHAFT POSITION SENSOR" on page 5-37.
2. Align:
• “T” mark “a” on the pickup rotor
(with the crankcase mating surface “b”)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the crankshaft counterclockwise.
b. When piston #1 is at TDC on the compression stroke, align the “T” mark “a” on the
pickup rotor with the crankcase mating surface “b”.
5. Remove:
• Camshaft caps “1”
• Dowel pins
ECA13720
NOTE:
CAUTION:
TDC on the compression stroke can be found
when the camshaft lobes are turned away from
each other.
To prevent damage to the cylinder head,
camshafts or camshaft caps, loosen the
camshaft cap bolts in stages and in a crisscross pattern, working from the outside in.
6. Remove:
• Intake camshaft “1”
• Exhaust camshaft “2”
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Loosen:
• Camshaft sprocket bolts “1”
NOTE:
Camshaft wrench
90890-04143
YM-04143
To prevent the timing chain from falling into the
crankcase, fasten it with a wire “3”.
4. Remove:
• Timing chain tensioner “1”
• Gasket
5-11
CAMSHAFTS
3. Measure:
• Camshaft runout
Out of specification → Replace.
EAS23850
CHECKING THE CAMSHAFTS
1. Check:
• Camshaft lobes
Blue discoloration/pitting/scratches →
Replace the camshaft.
2. Measure:
• Camshaft lobe dimensions “a” and “b”
Out of specification → Replace the camshaft.
Camshaft runout limit
0.030 mm (0.0012 in)
Camshaft lobe dimension limit
Intake A
34.450–34.550 mm (1.3563–
1.3602 in)
Limit
34.350 mm (1.3524 in)
Intake B
25.170–25.270 mm (0.9909–
0.9949 in)
Limit
25.070 mm (0.9870 in)
Exhaust A
33.550–33.650 mm (1.3209–
1.3248 in)
Limit
33.450 mm (1.3169 in)
Exhaust B
25.192–25.292 mm (0.9918–
0.9957 in)
Limit
25.092 mm (0.9879 in)
4. Measure:
• Camshaft-journal-to-camshaft-cap clearance
Out of specification → Measure the camshaft journal diameter.
Camshaft-journal-to-camshaftcap clearance
0.028–0.062
mm
(0.0011–
0.0024 in)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Install the camshaft into the cylinder head
(without the dowel pins and camshaft
caps).
b. Position “a” strip of Plastigauge® “1” onto
the camshaft journal as shown.
c. Install the dowel pins and camshaft caps.
NOTE:
• Tighten the camshaft cap bolts in stages and
in a crisscross pattern, working from the
inner caps out.
• Do not turn the camshaft when measuring
the camshaft journal-to-camshaft cap clearance with the Plastigauge®.
Camshaft cap bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
d. Remove the camshaft caps and then measure the width of the Plastigauge® “2”.
5-12
CAMSHAFTS
2. Check:
• Camshaft sprocket
More than 1/4 tooth wear “a” → Replace
the camshaft sprocket and the timing chain
as a set.
a.
b.
1.
2.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
5. Measure:
• Camshaft journal diameter “a”
Out of specification → Replace the camshaft.
Within specification → Replace the cylinder
head and the camshaft caps as a set.
1/4 tooth
Correct
Timing chain roller
Camshaft sprocket
EAS23950
CHECKING THE TIMING CHAIN GUIDES
The following procedure applies to all of the
camshaft sprockets and timing chain guides.
1. Check:
• Timing chain guide (exhaust side) “1”
• Timing chain guide (intake side) “2”
• Timing chain guide (top side) “3”
Damage/wear → Replace the defective
part(s).
Camshaft journal diameter
24.459–24.472 mm (0.9630–
0.9635 in)
EAS23870
CHECKING THE TIMING CHAIN AND CAMSHAFT SPROCKET
1. Check:
• Timing chain “1”
Damage/stiffness → Replace the timing
chain and camshaft and camshaft sprocket
as a set.
EAS23960
CHECKING THE TIMING CHAIN TENSIONER
1. Remove:
• Timing chain tensioner housing “1”
• Timing chain tensioner rod “2”
• Timing chain tensioner spring “3”
5-13
CAMSHAFTS
NOTE:
NOTE:
Squeeze the timing chain tensioner clip, and
then remove the timing chain tensioner spring
and timing chain tensioner rod.
When the timing chain tensioner rod “3” is
pushed while holding the grip of the timing
chain tensioner clip “2”, make sure not to
release the timing chain tensioner rod “3”
before releasing the timing chain tensioner clip
“2”. (Otherwise, the timing chain tensioner rod
“3” may run off.)
2.
•
•
•
Check:
Timing chain tensioner housing
Timing chain tensioner rod
Timing chain tensioner spring
Damage/wear → Replace.
3. Install:
• Timing chain tensioner spring
• Timing chain tensioner rod “1”
c. Hook the clip “4” to the timing chain tensioner rod “3”.
NOTE:
Hook the timing chain tensioner rod pin “5” to
the center of the clip “4”. After the installation,
check that the clip “4” can come off by its own
weight by pushing the timing chain tensioner
rod “3” at the position of installation.
NOTE:
Prior to installing the timing chain tensioner
rod, drain the engine oil from the timing chain
tensioner housing.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Install the timing chain tensioner spring and
timing chain tensioner rod “1”.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
b. Squeeze the timing chain tensioner clip “2”
and push the timing chain tensioner rod “3”.
5-14
CAMSHAFTS
EAS24000
INSTALLING THE CAMSHAFTS
1. Align:
• “T” mark “a” on the pickup rotor
(with the crankcase mating surface “b”)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the crankshaft clockwise.
b. When position #1 is at TDC, align the “T”
mark “a” with the crankcase mating surface
“b”.
4.
•
•
•
Install:
Dowel pins
Intake camshaft caps
Exhaust camshaft caps
NOTE:
• Make sure each camshaft cap is installed in
its original place. Refer to the identification
marks as follows:
“I”: Intake side camshaft cap mark
“E”: Exhaust side camshaft cap mark
“IL”: Intake left side camshaft cap mark
“IR”: Intake right side camshaft cap mark
“EL”: Exhaust left side camshaft cap mark
“ER”: Exhaust right side camshaft cap mark
• Make sure the arrow mark “a” on each camshaft points towards the right side of the
engine.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Install:
• Intake camshaft sprocket “1”
• Exhaust camshaft sprocket “2”
(with the camshaft sprockets temporarily
tightened)
NOTE:
Install the camshaft sprockets as a illustration.
5. Install:
• Camshaft cap bolts
3. Install:
• Exhaust camshaft “1”
• Intake camshafts “2”
(with the camshaft sprockets temporarily
tightened)
Camshaft cap bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
NOTE:
NOTE:
Tighten the camshaft cap bolts in stages and
in a crisscross pattern, working from the inner
caps out.
Make sure the punch mark “a” on each camshaft faces up.
5-15
CAMSHAFTS
ECA4C81004
CAUTION:
• Lubricate the camshaft cap bolts with the
engine oil.
• The camshaft cap bolts must be tightened
evenly or damage to the cylinder head,
camshaft caps, and camshafts will result.
• Do not turn the crankshaft when installing
the camshaft to avoid damage or
improper valve timing.
6. Tighten:
• Camshaft sprocket bolts “1”
8. Install:
• Gasket New
• Timing chain tensioner “1”
• Timing chain tensioner bolts “2”
Camshaft sprocket bolt
24 Nm (2.4 m·kg, 17 ft·lb)
Timing chain tensioner bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
Camshaft wrench
90890-04143
ECA4C81006
CAUTION:
ECA4C81005
CAUTION:
The arrow mark “a” on the timing chain tensioner should face up.
Be sure to tighten the camshaft sprocket
bolts to the specified torque to avoid the
possibility of the bolts coming loose and
damaging the engine.
EWA4C81004
WARNING
Always use a new gasket.
7. Align:
• Camshaft punch mark “a”
Align the camshaft punch mark “a” and the
camshaft cap arrow mark “b”.
9. Turn:
• Crankshaft
(several turns clockwise)
10. Check:
• “T” mark “a”
Make sure the “T” mark on the pickup rotor
is aligned with the crankcase mating surface “b”.
• Camshaft punch mark “c”
Make sure the punch mark “c” on the camshaft is aligned with the camshaft cap
arrow mark “d”.
Out of alignment → Adjust.
Refer to the installation steps above.
Camshaft wrench
90890-04143
5-16
CAMSHAFTS
11. Measure:
• Valve clearance
Out of specification → Adjust.
Refer to "ADJUSTING THE VALVE
CLEARANCE" on page 3-4.
12. Install:
• Pickup coil rotor cover
"CRANKSHAFT POSITION SENSOR" on
page 5-37.
5-17
CYLINDER HEAD
EAS24100
CYLINDER HEAD
Removing the cylinder head
Order
1
2
3
4
5
6
Job/Parts to remove
Engine
Intake camshaft
Exhaust camshaft
Cylinder head
Cylinder head gasket
Dowel pin
Coolant pipe
O-ring
Water pump breather hose
Q’ty
Remarks
Refer to "ENGINE REMOVAL" on page 5-1.
Refer to "CAMSHAFTS" on page 5-9.
Refer to "CAMSHAFTS" on page 5-9.
1
1
2
1
1
1
For installation, reverse the removal procedure.
5-18
CYLINDER HEAD
EAS24120
REMOVING THE CYLINDER HEAD
1. Remove:
• Intake camshaft
• Exhaust camshaft
Refer to "REMOVING THE CAMSHAFTS"
on page 5-11.
2. Remove:
• Cylinder head nuts
• Cylinder head bolts
Warpage limit
0.10 mm (0.0039 in)
NOTE:
• Loosen the nuts in the proper sequence as
shown.
• Loosen each nut 1/2 of a turn at a time. After
all of the nuts are fully loosened, remove
them.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Place a straightedge “1” and a thickness
gauge “2” across the cylinder head.
EAS24160
b. Measure the warpage.
c. If the limit is exceeded, resurface the cylinder head as follows.
d. Place a 400–600 grit wet sandpaper on the
surface plate and resurface the cylinder
head using a figure-eight sanding pattern.
CHECKING THE CYLINDER HEAD
1. Eliminate:
• Combustion chamber carbon deposits
(with a rounded scraper)
NOTE:
Do not use a sharp instrument to avoid damaging or scratching:
• Spark plug bore threads
• Valve seats
NOTE:
To ensure an even surface, rotate the cylinder
head several times.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Check:
• Cylinder head
Damage/scratches → Replace.
EAS24240
INSTALLING THE CYLINDER HEAD
1. Check:
• Cylinder head bolts “1”
NOTE:
Replace the titanium valves with the cylinder
head.
Cylinder head bolt
8 Nm (0.8 m·kg, 5.8 ft·lb)
Refer to "CHECKING THE VALVE SEATS"
on page 5-25.
• Cylinder head water jacket
Mineral deposits/rust → Eliminate.
3. Measure:
• Cylinder head warpage
Out of specification → Resurface the cylinder head.
NOTE:
Retighten the cylinder head bolts to specification, before installing the cylinder head.
5-19
CYLINDER HEAD
NOTE:
• First, tighten the nuts “1” – “10” to approximately 10 Nm (1.0 m·kg, 7.2 ft·lb) with a
torque wrench, and then tighten the 25 Nm
(2.5 m·kg, 18 ft·lb).
• Retighten the nuts “1” – “10” to 40 Nm (4.0
m·kg, 29 ft·lb) with a torque wrench.
• Final, tighten the nuts “7”, “10” to 55 Nm (5.5
m·kg, 40 ft·lb) with a torque wrench.
• Lubricate the cylinder head nuts with engine
oil.
• Tighten the cylinder head nuts in the proper
tightening sequence as shown and torque
them in four stages.
2. Install:
• Gasket “1” New
• Dowel pins
3. Install:
• Cylinder head
5. Install:
• Exhaust camshaft
• Intake camshaft
Refer to "INSTALLING THE CAMSHAFTS"
on page 5-15.
NOTE:
Pass the timing chain through the timing chain
cavity.
4. Tighten:
• Cylinder head nuts “1” – “10”
Cylinder head nut (1st)
10 Nm (1.0 m·kg, 7.2 ft·lb)
Cylinder head nut (2nd)
25 Nm (2.5 m·kg, 18 ft·lb)
Cylinder head nut (3rd)
40 Nm (4.0 m·kg, 29 ft·lb)
• Cylinder head nuts “7” “10”
Cylinder head nut (final)
55 Nm (5.5 m·kg, 40 ft·lb)
• Cylinder head bolts “11” “12”
Cylinder head bolt
12 Nm (1.2 m·kg, 8.7 ft·lb)
5-20
VALVES AND VALVE SPRINGS
EAS24270
VALVES AND VALVE SPRINGS
Removing the valves and valve springs
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Job/Parts to remove
Cylinder head
Intake valve lifter
Intake valve pad
Intake valve cotter
Intake valve upper spring seat
Intake valve spring
Intake valve oil seal
Intake valve lower spring seat
Intake valve
Intake valve guide
Exhaust valve lifter
Exhaust valve pad
Exhaust valve cotter
Exhaust valve upper spring seat
Exhaust valve spring
Exhaust valve oil seal
Exhaust valve lower spring seat
Exhaust valve
Exhaust valve guide
Q’ty
8
8
16
8
8
8
8
8
8
8
8
16
8
8
8
8
8
8
5-21
Remarks
Refer to "CYLINDER HEAD" on page 5-18.
VALVES AND VALVE SPRINGS
Removing the valves and valve springs
Order
Job/Parts to remove
Q’ty
5-22
Remarks
For installation, reverse the removal procedure.
VALVES AND VALVE SPRINGS
• Valve cotters “1”
EAS24280
REMOVING THE VALVES
The following procedure applies to all of the
valves and related components.
NOTE:
Remove the valve cotters by compressing the
valve spring with the valve spring compressor
“2” and the valve spring compressor attachment “3”.
NOTE:
Before removing the internal parts of the cylinder head (e.g., valves, valve springs, valve
seats), make sure the valves properly seal.
Valve spring compressor
90890-04019
YM-04019
Valve spring compressor
attachment
90890-04108
Valve spring compressor
adapter 22 mm
YM-04108
1. Remove:
• Valve lifter “1”
• Valve pad “2”
NOTE:
Make a note of the position of each valve lifter
and valve pad so that they can be reinstalled in
their original place.
2. Check:
• Valve sealing
Leakage at the valve seat → Check the
valve face, valve seat, and valve seat width.
Refer to "CHECKING THE VALVE SEATS"
on page 5-25.
4.
•
•
•
•
•
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
Remove:
Upper spring seat “1”
Valve spring “2”
Valve stem seal “3”
Lower spring seat “4”
Valve “5”
NOTE:
a. Pour a clean solvent “a” into the intake and
exhaust ports.
b. Check that the valves properly seal.
Identify the position of each part very carefully
so that it can be reinstalled in its original place.
NOTE:
There should be no leakage at the valve seat
“1”.
EAS24290
CHECKING THE VALVES AND VALVE
GUIDES
The following procedure applies to all of the
valves and valve guides.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Remove:
5-23
VALVES AND VALVE SPRINGS
1. Measure:
• Valve-stem-to-valve-guide clearance
Out of specification → Replace the valve
guide.
a. Remove the valve guide with the valve
guide remover “1”.
• Valve-stem-to-valve-guide clearance =
Valve guide inside diameter “a” Valve stem diameter “b”
Valve-stem-to-valve-guide clearance
Valve-stem-to-valve-guide clearance (intake)
0.010–0.037
mm
(0.0004–
0.0015 in)
Limit
0.080 mm (0.0032 in)
Valve-stem-to-valve-guide clearance (exhaust)
0.025–0.052
mm
(0.0010–
0.0020 in)
Limit
0.100 mm (0.0039 in)
b. Install the new valve guide with the valve
guide installer “2” and valve guide remover
“1”.
c. After installing the valve guide, bore the
valve guide with the valve guide reamer “3”
to obtain the proper valve-stem-to-valveguide clearance.
NOTE:
After replacing the valve guide, reface the
valve seat.
2. Replace:
• Valve guide
NOTE:
To ease valve guide removal and installation,
and to maintain the correct fit, heat the cylinder
head to 100°C (212°F) in an oven.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
5-24
VALVES AND VALVE SPRINGS
Valve guide remover (ø4.5)
90890-04116
Valve guide remover (4.5 mm)
YM-04116
Valve guide remover (ø5)
90890-04097
Valve guide remover (5.0 mm)
YM-04097
Valve guide installer (ø4.5)
90890-04117
Valve guide installer (4.5 mm)
YM-04117
Valve guide installer (ø5)
90890-04098
Valve guide installer (5.0 mm)
YM-04098
Valve guide reamer (ø4.5)
90890-04118
Valve guide reamer (4.5 mm)
YM-04118
Valve guide reamer (ø5)
90890-04099
Valve guide reamer (5.0 mm)
YM-04099
6. Measure:
• Valve stem runout
Out of specification → Replace the valve.
NOTE:
• When installing a new valve, always replace
the valve guide.
• If the valve is removed or replaced, always
replace the oil seal.
Valve stem runout
Valve stem runout
0.010 mm (0.0004 in)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Eliminate:
• Carbon deposits
(from the valve face and valve seat)
4. Check:
• Valve face
Pitting/wear → Grind the valve face.
• Valve stem end
Mushroom shape or diameter larger than
the body of the valve stem → Replace the
valve.
5. Measure:
• Valve margin thickness “a”
Out of specification → Replace the valve.
EAS24300
CHECKING THE VALVE SEATS
The following procedure applies to all of the
valves and valve seats.
1. Eliminate:
• Carbon deposits
(from the valve face and valve seat)
2. Check:
• Valve seat
Pitting/wear → Replace the cylinder head.
3. Measure:
• Valve seat width “a”
Out of specification → Replace the cylinder
head.
Valve margin thickness
Valve margin thickness D
(intake)
1.10–1.50 mm (0.0433–0.0591
in)
Valve margin thickness D
(exhaust)
0.50–0.90 mm (0.0197–0.0354
in)
5-25
VALVES AND VALVE SPRINGS
ECA4C81012
Valve seat width
Valve seat width C (intake)
0.90–1.10 mm (0.0354–0.0433
in)
Valve seat width C (exhaust)
0.90–1.10 mm (0.0354–0.0433
in)
CAUTION:
This model uses titanium intake valves.
Titanium valves that have been used to lap
the valve seats must not be used. Always
replace lapped valves with new valves.
NOTE:
• When replacing the cylinder head, replace
the valves without lapping the valve seats
and valve faces.
• When replacing the valves or valves guides,
use new valves to lap the valve seats, and
then replace them with new valves.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Apply a coarse lapping compound “a” to
the valve face.
ECA13790
CAUTION:
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Apply Mechanic’s blueing dye (Dykem) “b”
onto the valve face.
Do not let the lapping compound enter the
gap between the valve stem and the valve
guide.
b. Install the valve into the cylinder head.
c. Press the valve through the valve guide
and onto the valve seat to make a clear
impression.
d. Measure the valve seat width.
b. Apply molybdenum disulfide oil onto the
valve stem.
c. Install the valve into the cylinder head.
d. Turn the valve until the valve face and valve
seat are evenly polished, then clean off all
of the lapping compound.
NOTE:
Where the valve seat and valve face contacted
one another, the blueing will have been
removed.
NOTE:
For the best lapping results, lightly tap the
valve seat while rotating the valve back and
forth between your hands.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
4. Lap:
• Valve face
• Valve seat
NOTE:
After replacing the cylinder head or replacing
the valve and valve guide, the valve seat and
valve face should be lapped.
5-26
VALVES AND VALVE SPRINGS
Out of specification → Replace the valve
spring.
Valve spring free length
Free length (intake)
39.79 mm (1.57 in)
Limit
37.80 mm (1.49 in)
Free length (exhaust)
38.42 mm (1.51 in)
Limit
36.50 mm (1.44 in)
e. Apply a fine lapping compound to the valve
face and repeat the above steps.
f. After every lapping procedure, be sure to
clean off all of the lapping compound from
the valve face and valve seat.
g. Apply Mechanic’s blueing dye (Dykem) “b”
onto the valve face.
2. Measure:
• Compressed valve spring force “a”
Out of specification → Replace the valve
spring.
h. Install the valve into the cylinder head.
i. Press the valve through the valve guide
and onto the valve seat to make a clear
impression.
j. Measure the valve seat width “c” again. If
the valve seat width is out of specification,
reface and lap the valve seat.
Installed compression spring
force (intake)
171–197 N (38.44–44.29 lbf)
(17.44–20.09 kgf) at 35.50 mm
(1.398 in)
Installed compression spring
force (exhaust)
202–232 N (45.41–52.15 lbf)
(20.60–23.66 kgf) at 33.00 mm
(1.299 in)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS24310
CHECKING THE VALVE SPRINGS
The following procedure applies to all of the
valve springs.
1. Measure:
• Valve spring free length “a”
b. Installed length
5-27
VALVES AND VALVE SPRINGS
3. Measure:
• Valve spring tilt “a”
Out of specification → Replace the valve
spring.
Spring tilt limit
Spring tilt (intake)
2.5 °/1.7 mm
Spring tilt (exhaust)
2.5 °/1.7 mm
2. Lubricate:
• Valve stem “1”
• Valve stem seal “2”
(with the recommended lubricant)
Recommended lubricant
Molybdenum disulfide oil
EAS24320
CHECKING THE VALVE LIFTERS
The following procedure applies to all of the
valve lifters.
1. Check:
• Valve lifter
Damage/scratches → Replace the valve
lifters and cylinder head.
3.
•
•
•
•
•
Install:
Valve “1”
Lower spring seat “2”
Valve stem seal “3”
Valve spring “4”
Upper spring seat “5”
(into the cylinder head)
NOTE:
• Make sure each valve is installed in its original place. Refer to the following embossed
marks.
Intake valve: Pink paint mark
Exhaust valve: “4C8”
• Install the valve springs with the larger pitch
“a” facing up.
EAS24340
INSTALLING THE VALVES
The following procedure applies to all of the
valves and related components.
1. Deburr:
• Valve stem end
(with an oil stone)
5-28
VALVES AND VALVE SPRINGS
b. Smaller pitch
6. Lubricate:
• Valve pad “1”
• Valve lifter “2”
(with the recommended lubricant)
4. Install:
• Valve cotters “1”
NOTE:
Install the valve cotters by compressing the
valve spring with the valve spring compressor
“2” and the valve spring compressor attachment “3”.
Recommended lubricant
Molybdenum disulfide oil
7. Install:
• Valve pad
• Valve lifter
Valve spring compressor
90890-04019
YM-04019
Valve spring compressor
attachment
90890-04108
Valve spring compressor
adapter 22 mm
YM-04108
NOTE:
• The valve lifter must move smoothly when
rotated with a finger.
• Each valve lifter and valve pad must be reinstalled in its original position.
5. To secure the valve cotters “1” onto the
valve stem, lightly tap the valve tip with a
soft-face hammer.
ECA13800
CAUTION:
Hitting the valve tip with excessive force
could damage the valve.
5-29
GENERATOR
EAS24480
GENERATOR
Removing the generator
Order
Job/Parts to remove
Rider seat
Passenger seat
Side cowlings
Lower cowlings
Q’ty
Engine oil
1
2
3
4
5
6
7
8
9
10
11
Stator coil assembly coupler
Plug
Generator rotor cover
Gasket
Dowel pin
Generator rotor assembly
Stator coil assembly
Dowel pin
Bearing housing
Collar
Bearing
1
1
1
1
2
1
1
2
1
1
1
5-30
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Drain.
Refer to "CHANGING THE ENGINE OIL" on
page 3-11.
Disconnect.
GENERATOR
Removing the generator
Order
12
13
14
15
16
Job/Parts to remove
Stator coil assembly lead holder
Idler gear
Idler gear shaft
Washer
Bearing
Q’ty
1
1
1
1
1
Remarks
For installation, reverse the removal procedure.
5-31
GENERATOR
EAS24490
EAS24500
REMOVING THE GENERATOR
1. Remove:
• Plug
• Generator rotor cover “1”
INSTALLING THE GENERATOR
1. Install:
• Idle gear shaft
• Idle gear “1”
• Washer
• Idle gear shaft bolt “2”
NOTE:
• While pushing generator rotor, remove the
generator rotor cover.
• Loosen each bolt 1/4 of a turn a time, in
stages and in a crisscross pattern.
• After all of the bolts are fully loosened,
remove them.
Idle gear shaft bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
LOCTITE®
2. Install
• Generator rotor and starter clutch assembly “1”
2. Remove:
• Generator rotor and starter clutch assembly “1”
3.
•
•
•
3. Install:
Remove:
Idle gear shaft bolt “1”
Idle shaft
Idle gear “2”
• Generator rotor cover gasket New
• Generator rotor cover “1”
Generator rotor cover bolt (M6)
12 Nm (1.2 m·kg, 8.7 ft·lb)
Generator rotor cover bolt (M8)
22 Nm (2.2 m·kg, 16 ft·lb)
5-32
GENERATOR
NOTE:
• First tighten the M8 bolts and then tighten the
M6 bolts.
• Tighten the generator rotor cover bolts in
stages and in a crisscross pattern.
5-33
STARTER CLUTCH
EAS24550
STARTER CLUTCH
Removing the starter clutch
Order
1
2
3
4
5
6
7
8
9
Job/Parts to remove
Generator rotor
Damper
Driven gear
Washer
Starter clutch drive gear
Collar
Washer
Spacer
O-ring
Q’ty
1
3
1
1
1
1
1
1
1
Remarks
For assembly, reverse the removal procedure.
5-34
STARTER CLUTCH
EAS24560
REMOVING THE STARTER CLUTCH
1. Remove:
• Spacer “1”
• O-ring “2”
• Washer “3”
EAS24570
CHECKING THE STARTER CLUTCH
1. Check:
• Starter clutch rollers “1”
Damage/wear → Replace.
2.
•
•
•
3.
•
•
•
Remove:
Starter clutch drive gear “1”
Collar “2”
Washer “3”
2. Check:
• Starter clutch idle gear “1”
• Starter clutch drive gear “2”
Burrs/chips/roughness/wear → Replace
the defective part(s).
Remove:
Driven gear “1”
Dampers “2”
Generator rotor “3”
3. Check:
• Starter clutch gear’s contacting surfaces
Damage/pitting/wear → Replace the starter
clutch gear.
4. Check:
• Starter clutch operation
EAS4C81007
CHECKING THE DAMPER
1. Check:
• Dampers “1”
Damage/wear → Replace.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Install the starter clutch drive gear “1” onto
the starter clutch “2” and hold the starter
clutch.
b. When turning the starter clutch drive gear
clockwise “A”, the starter clutch and the
starter clutch drive gear should engage,
5-35
STARTER CLUTCH
3. Install:
• Washer “1”
otherwise the starter clutch is faulty and
must be replaced.
c. When turning the starter clutch drive gear
counterclockwise “B”, it should turn freely,
otherwise the starter clutch is faulty and
must be replaced.
• O-ring “2” New
• Spacer “3”
NOTE:
Lubricate the engine oil to O-ring.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS24600
INSTALLING THE STARTER CLUTCH
1. Install:
• Generator rotor “1”
• Damper “2”
• Driven gear “3”
NOTE:
• The hole side of the damper is installed to
the generator side.
• Lubricate the engine oil “4”.
2.
•
•
•
Install
Starter clutch drive gear “1”
Collar “2”
Washer “3”
Refer to "CHECKING THE STARTER
CLUTCH" on page 5-35.
5-36
CRANKSHAFT POSITION SENSOR
EAS24520
CRANKSHAFT POSITION SENSOR
Removing the crankshaft position sensor
Order
Job/Parts to remove
Rider seat
Side cowlings
Lower cowlings
Fuel tank
Q’ty
Engine oil
1
2
3
4
5
6
Crankshaft position sensor lead coupler
Crankshaft position sensor
O-ring
Pickup rotor cover
Gasket
Cover
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "FUEL TANK" on page 7-1.
Drain.
Refer to "CHANGING THE ENGINE OIL" on
page 3-11.
1
1
1
1
1
1
For installation, reverse the removal procedure.
5-37
CRANKSHAFT POSITION SENSOR
2. Connect
• Crankshaft position sensor lead coupler
EAS24530
REMOVING THE CRANKSHAFT POSITION
SENSOR
1. Disconnect:
• Crankshaft position sensor lead coupler
2. Remove:
• Crankshaft position sensor
• O-ring
• Pickup coil rotor cover “1”
NOTE:
Loosen each bolt 1/4 of a turn at a time, in
stages and in a crisscross pattern.
After all of the bolts are fully loosened, remove
them.
EAS24540
INSTALLING THE CRANKSHAFT POSITION
SENSOR
1. Install:
• Gasket New
• Pickup rotor cover “1”
Pickup rotor cover
12 Nm (1.2 m·kg, 8.7 ft·lb)
• O-ring New
• Crankshaft position sensor
Crankshaft position sensor bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
LOCTITE®
5-38
ELECTRIC STARTER
EAS24780
ELECTRIC STARTER
Removing the starter motor
Order
1
2
Job/Parts to remove
Rider seat
Fuel tank
Air filter case
Throttle body
Starter motor lead
Starter motor
Q’ty
1
1
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "FUEL TANK" on page 7-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "THROTTLE BODIES" on page 7-4.
Disconnect.
For installation, reverse the removal procedure.
5-39
ELECTRIC STARTER
Disassembling the starter motor
Order
1
2
3
4
5
6
7
8
9
Job/Parts to remove
O-ring
Front cover
Lock washer
Washer
Starter motor yoke
Armature assembly
Gasket
Brush holder
Rear cover
Q’ty
1
1
1
1
1
1
2
1
1
Remarks
For assembly, reverse the removal procedure.
5-40
ELECTRIC STARTER
EAS24790
CHECKING THE STARTER MOTOR
1. Check:
• Commutator
Dirt → Clean with 1000 grit sandpaper.
2. Measure:
• Commutator diameter “a”
Out of specification → Replace the starter
motor.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Armature coil
Commutator resistance “1”
0.009–0.011 Ω at 20°C (68°F)
Insulation resistance “2”
Above 1 MΩ at 20°C (68°F)
Limit
23.5 mm (0.93 in)
b. If any resistance is out of specification,
replace the starter motor.
3. Measure:
• Mica undercut “a”
Out of specification → Scrape the mica to
the proper measurement with a hacksaw
blade that has been grounded to fit the
commutator.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
5. Measure:
• Brush length “a”
Out of specification → Replace the brushes
as a set.
Mica undercut (depth)
1.50 mm (0.06 in)
Limit
7.19 mm (0.28 in)
NOTE:
The mica of the commutator must be undercut
to ensure proper operation of the commutator.
6. Measure:
• Brush spring force
Out of specification → Replace the brush
springs as a set.
4. Measure:
• Armature assembly resistances (commutator and insulation)
Out of specification → Replace the starter
motor.
Brush spring force
5.28–7.92 N (19.01–28.51 oz)
(538–808 gf)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Measure the armature assembly resistances with the pocket tester.
5-41
ELECTRIC STARTER
7. Check:
• Gear teeth
Damage/wear → Replace the starter
motor.
3. Install:
• Nut “1”
Nut
5 Nm (0.5 m·kg, 3.6 ft·lb)
EAS24800
ASSEMBLING THE STARTER MOTOR
1. Install:
• Brush holder
• Armature
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Pull both the brush spring and the brush
outside and hook the brush spring to the
groove portion at the side of the brush.
4. Install:
• Starter motor yoke “1”
• Gasket “2” New
• Starter motor rear cover “3”
• Starter motor assembling bolts “4”
b. Insert the armature into the brush holder
and push the brush inside until it touches
the armature.
Starter motor assembling bolt
5 Nm (0.5 m·kg, 3.6 ft·lb)
NOTE:
Align the match marks “a” on the starter motor
yoke with the match marks “b” on the front and
starter motor rear covers.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Install:
• O-rings New
• Rear cover “1”
NOTE:
Align the tab “a” on the brush holder “2” with
the tab “b” in the starter motor rear cover.
5-42
ELECTRIC STARTER
EAS24810
INSTALLING THE STARTER MOTOR
1. Install:
• Starter motor “1”
• Starter motor bolts “2”
Starter motor bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
2. Connect:
• Starter motor lead “3”
Starter motor lead bolt
7 Nm (0.7 m·kg, 5.1 ft·lb)
5-43
CLUTCH
EAS25060
CLUTCH
Removing the clutch cover
Order
Job/Parts to remove
Right side cowling
Bottom cowlings
Q’ty
Engine oil
1
2
3
4
5
6
Cover
Clutch cable
Clutch cover
Clutch cover gasket
Dowel pin
Oil filler cap
1
1
1
1
2
1
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Drain.
Refer to "CHANGING THE ENGINE OIL" on
page 3-11.
Disconnect.
For installation, reverse the removal procedure.
5-44
CLUTCH
Removing the push lever shaft
Order
1
2
3
4
5
6
Job/Parts to remove
Circlip
Pull lever
Pull lever spring
Pull lever shaft
Oil seal
Bearing
Q’ty
2
1
1
1
1
2
Remarks
For installation, reverse the removal procedure.
5-45
CLUTCH
Removing the clutch
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Job/Parts to remove
Compression spring
Pressure plate 1
Push rod
Bearing
Friction plate 1
Clutch plate 1
Friction plate 2
Clutch plate 2
Clutch plate 3
Friction plate 3
Clutch damper spring
Clutch damper spring seat
Muffler
Spring
Clutch boss
Pressure plate 2
Conical spring washer
Thrust plate 2
Clutch housing
Bearing
Q’ty
6
1
1
1
1
1
7
1
6
1
1
1
1
3
1
1
1
1
1
1
Remarks
For installation, reverse the removal procedure.
5-46
CLUTCH
•
•
•
•
•
•
EAS25080
REMOVING THE CLUTCH
1. Remove:
• Clutch cover “1”
• Gasket
NOTE:
Friction plate 2
Clutch plate 2
Clutch plate 3
Friction plate 3
Clutch damper spring
Clutch damper spring seat
Loosen each bolt 1/4 of a turn at a time, in
stages and in a crisscross pattern.
After all of the bolts are fully loosened, remove
them.
5. Straighten the clutch boss nut rib “1”.
2.
•
•
•
•
Remove:
Compression spring bolts “1”
Compression springs
Pressure plate “2”
Push rod “3”
6. Loosen:
• Clutch boss nut “1”
NOTE:
While holding the clutch boss “2” with the universal clutch holder “3”, loosen the clutch boss
nut.
Universal clutch holder
90890-04086
YM-91042
3. Remove:
• Friction plate 1 “1”
4. Remove:
• Clutch plate 1 “1”
7. Remove:
• Clutch boss nut
5-47
CLUTCH
•
•
•
•
Springs
Pressure plate 2
Conical spring washer
Thrust plate 2
EAS25100
CHECKING THE FRICTION PLATES
The following procedure applies to all of the
friction plates.
1. Check:
• Friction plate
Damage/wear → Replace the friction
plates as a set.
2. Measure:
• Friction plate thickness
Out of specification → Replace the friction
plates as a set.
3. Measure:
• assembly width “a” of the friction plates and
clutch plates
Out of specification → Adjust.
Assembly width
42.4–43.0 mm (1.67–1.69 in)
NOTE:
Measure the friction plate at four places.
NOTE:
Perform the thickness measurement without
applying the oil.
Friction plate thickness
2.90–3.10 mm (0.114–0.122 in)
Wear limit
2.80 mm (0.1102 in)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Assembly width adjusted by clutch plate “1”
and “2”.
b. Select the clutch plate from the following
table.
Clutch plate “1”
EAS25110
CHECKING THE CLUTCH PLATES
The following procedure applies to all of the
clutch plates.
1. Check:
• Clutch plate
Damage → Replace the clutch plates as a
set.
2. Measure:
• Clutch plate warpage
(with a surface plate and thickness gauge
“1”)
Out of specification → Replace the clutch
plates as a set.
Part No.
4B1-16324-00
5VY-16325-00
4B1-16325-00
Warpage limit
0.10 mm (0.0039 in)
5-48
Thickness
1.6 mm (0.062 in)
2.0 mm (0.079 in)
2.3 mm (0.091 in)
STD
CLUTCH
Clutch plate “2”
Part No.
5VY-16325-00
4B1-16325-00
Thickness
2.0 mm (0.079 in)
2.3 mm (0.091 in)
EAS25150
CHECKING THE CLUTCH HOUSING
1. Check:
• Clutch housing dogs
Damage/pitting/wear → Deburr the clutch
housing dogs or replace the clutch housing.
STD
NOTE:
When adjusting the clutch assembly width [by
replacing the clutch plate(s)], be sure to
replace the clutch plate “1” fast.
After replacing the clutch plate “1”, if specifications cannot be met, replace the clutch plate
“2”.
NOTE:
Pitting on the clutch housing dogs will cause
erratic clutch operation.
2. Check:
• Bearing
Damage/wear → Replace the bearing and
clutch housing.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS25160
CHECKING THE CLUTCH BOSS
1. Check:
• Clutch boss splines
Damage/pitting/wear → Replace the clutch
boss.
EAS25140
CHECKING THE CLUTCH SPRINGS
The following procedure applies to all of the
clutch springs.
1. Check:
• Clutch spring
Damage → Replace the clutch springs as a
set.
2. Measure:
• Clutch spring free length “a”
Out of specification → Replace the clutch
springs as a set.
NOTE:
Pitting on the clutch boss splines will cause
erratic clutch operation.
Clutch spring free length
43.80 mm (1.72 in)
Limit
41.61 mm (1.64 in)
2. Check:
• Clutch boss
Cracks/damage → Replace.
5-49
CLUTCH
EAS4C81005
CHECKING THE PRESSUR PLATE 2
1. Check:
• Pressure plate 2
Cracks / damage → Replace.
2. Check:
• Push rod bearing
Damage/wear → Replace.
EAS25170
EAS25240
CHECKING THE PRESSURE PLATE 1
1. Check:
• Pressure plate “1”
Cracks/damage → Replace.
• Bearing “2”
Damage/wear → Replace.
INSTALLING THE CLUTCH
1. Install:
• Clutch housing “1”
• Conical spring washer
• Thrust plate 2
NOTE:
Align the projection of clutch housing “a” and
hollow of the oil pump drive gear “b”.
EAS4C81006
CHECKING THE PUSH LEVER SHAFT AND
PUSH ROD
1. Check:
• Push lever shaft pinion gear teeth “1”
• Push rod teeth “2”
Damage/wear → Replace the push rod and
push lever shaft pinion gear as a set.
2. Install:
• Pressure plate 2 “1”
• Clutch boss “2”
NOTE:
Fit the groove “a” of the pressure plate 2 to the
projection “b” of the clutch boss to assemble.
5-50
CLUTCH
3. Install:
• Spring “1”
• Clutch boss nut “2” New
Clutch boss nut
115 Nm (11.5 m·kg, 83 ft·lb)
NOTE:
• Put the spring detent “a” into the groove of
the pressure plate 2.
Assemble so that each spring detent “a” is
positioned in a different groove.
• While holding the clutch boss “3” with the
clutch holding tool “4”, tighten the clutch boss
nut.
• Lock the threads on the clutch boss nut by
staking them with a drift punch at the point
aligned with the groove in the axle.
4. Install:
• Clutch damper spring seat “1”
• Clutch damper spring “2”
NOTE:
Install the clutch damper spring as shown in
the illustration.
Universal clutch holder
90890-04086
YM-91042
5. Lubricate:
• Friction plates
• Clutch plates
(with the recommended lubricant)
Recommended lubricant
Engine oil
6.
•
•
•
•
•
5-51
Install:
Friction plate 3
Friction plate 2
Clutch plate 3
Clutch plate 2
Clutch plate 1 “1”
CLUTCH
• Clutch springs
• Clutch spring bolts “1”
NOTE:
Assemble the friction plates and clutch plates
according to the installation order.
Clutch spring bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
NOTE:
Tighten the clutch spring bolts in stages and in
a crisscross pattern.
7. Install:
• Friction plate 1 “1”
NOTE:
Install the last friction plate shifting half phase.
10. Install:
• Push lever
NOTE:
Install the push lever with the “h” mark facing
toward upper side.
8.
•
•
•
Install:
Bearing
Pull rod
Pressure plate 1 “1”
11. Install:
• Clutch cover
• Clutch cover gasket
NOTE:
Align the punch mark “a” on the pressure plate
with the punch mark “b” on the clutch boss.
NOTE:
• Install the push rod so that the teeth a face
towards the rear of the vehicle. Then, install
the clutch cover.
• Apply oil onto the bearing.
• Apply molybdenum disulfide grease onto the
push rod.
• When installing the clutch cover, push the
push lever and check that the punch mark “a”
on the push lever aligns with the mark “b” on
the clutch cover. Make sure that the push rod
teeth and push lever shaft pinion gear are
engaged.
9. Install:
5-52
CLUTCH
12. Tighten:
• Clutch cover bolts “1”
• Clutch cover bolt “2”
Clutch cover bolt
12 Nm (1.2 m·kg, 8.7 ft·lb)
Clutch cover bolt
12 Nm (1.2 m·kg, 8.7 ft·lb)
LOCTITE®
NOTE:
Tighten the clutch cover bolts in a stages and
in a crisscross pattern.
13. Adjust:
• Clutch cable free play
Refer to "ADJUSTING THE CLUTCH
CABLE FREE PLAY" on page 3-14.
5-53
SHIFT SHAFT
EAS25410
SHIFT SHAFT
Removing the shift shaft and stopper lever
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
Job/Parts to remove
Q’ty
Shift arm
Clutch assembly
Circlip
Washer
Shift shaft
Collar
Shift shaft spring
Washer
Stopper screw
Stopper lever
Washer
Oil seal
Bearing
Bearing
Stopper lever spring
Remarks
Refer to "ENGINE REMOVAL" on page 5-1
Refer to "CLUTCH" on page 5-44.
1
1
1
1
1
1
1
1
1
1
1
1
1
For installation, reverse the removal procedure.
5-54
SHIFT SHAFT
EAS4C81008
REMOVING THE SHIFT SHAFT
1. Remove:
• Clutch assembly
Refer to "CLUTCH" on page 5-44
2. Remove:
• Shift arm
• Shift rod
Refer to "ENGINE REMOVAL" on page 5-1
3. Remove:
• Circlip “1”
• Washer “2”
(left side of the engine)
4.
•
•
•
•
EAS25420
CHECKING THE SHIFT SHAFT
1. Check:
• Shift shaft “1”
Bends/damage/wear → Replace.
• Shift lever spring “2”
• Collar “3”
Damage/wear → Replace.
Remove
Shift shaft “1”
Shift shaft spring “2”
Collar
Washer
EAS25430
CHECKING THE STOPPER LEVER
1. Check:
• Stopper lever “1”
Bends/damage → Replace.
Roller turns roughly → Replace the stopper
lever.
5.
•
•
•
•
Remove:
Stopper lever spring “1”
Stopper screw “2”
Stopper lever “3”
Washer
EAS25450
INSTALLING THE SHIFT SHAFT
1. Install:
• Washer
• Stopper lever “1”
• Stopper screw “2”
Stopper screw
22 Nm (2.2 m·kg, 16 ft·lb)
LOCTITE®
5-55
SHIFT SHAFT
4. Install:
• Shift rod
• Shift arm
Refer to "ENGINE REMOVAL" on page 51.
5. Install:
• Clutch assembly
Refer to "CLUTCH" on page 5-44.
• Stopper lever spring “3”
2.
•
•
•
•
Install:
Washer
Collar
Shift shaft spring “1”
Shift shaft “2”
NOTE:
• Mesh the stopper lever with the shift drum
segment assembly.
• Lubricate the oil seal lips with lithium soap
base grease.
• Install the end of the shift shaft spring onto
the shift shaft spring stopper.
3. Install:
• Washer “1”
• Circlip “2” New
5-56
OIL PUMP
EAS24920
OIL PUMP
Removing the oil pan and oil pump
Order
Job/Parts to remove
Side cowlings
Lower cowlings
Q’ty
Engine oil
EXUP cables
O2 sensor
1
2
3
4
5
6
7
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Drain.
Refer to "CHANGING THE ENGINE OIL" on
page 3-11.
Refer to "ENGINE REMOVAL" on page 5-1
Refer to "ENGINE REMOVAL" on page 5-1
Muffler
Exhaust pipe assembly
Clutch assembly
Water pump inlet pipe
Water pump outlet pipe
Oil level switch lead coupler
Oil level switch
Oil level switch lead holder
Oil pan
Oil pan gasket
Dowel pin
Drain pipe
1
1
1
1
1
1
2
5-57
Refer to "ENGINE REMOVAL" on page 5-1
Refer to "ENGINE REMOVAL" on page 5-1
Refer to "CLUTCH" on page 5-44.
Refer to "OIL COOLER" on page 6-4.
Refer to "OIL COOLER" on page 6-4.
Disconnect.
OIL PUMP
Removing the oil pan and oil pump
Order
8
9
10
11
12
13
14
15
16
17
18
Job/Parts to remove
Oil strainer
Oil pipe
Oil delivery pipe
Relief valve assembly
Oil/water pump assembly drive chain guide
Collar
Oil/water pump assembly drive sprocket
Washer
Oil/water pump assembly drive chain
Dowel pin
Oil/water pump assembly
Q’ty
1
1
1
1
1
1
1
1
1
1
1
Remarks
For installation, reverse the removal procedure.
5-58
OIL PUMP
Disassembling the oil pump
Order
1
2
3
4
5
6
7
8
Job/Parts to remove
Oil/water pump driven sprocket
Collar
Oil pump housing
Bearing
Pin
Oil pump outer rotor
Oil pump inner rotor
Pin
Q’ty
1
1
1
1
2
1
1
1
Remarks
For assembly, reverse the disassembly procedure.
5-59
OIL PUMP
EAS24930
EAS24960
REMOVING THE OIL PAN
1. Remove:
• Oil level switch “1”
• Oil pan “2”
• Gasket
• Dowel pins
CHECKING THE OIL PUMP
1. Check:
• Oil pump driven gear “1”
• Oil pump housing “2”
Cracks/damage/wear → Replace the
defective part(-s).
NOTE:
Loosen each bolt 1/4 of a turn at a time, in
stages and in a crisscross pattern. After all of
the bolts are fully loosened, remove them.
2. Measure:
• Inner-rotor-to-outer-rotor-tip clearance “a”
• Outer-rotor-to-oil-pump-housing clearance
“b”
• Oil-pump-housing-to-inner-rotor-and-outerrotor clearance “c”
Out of specification → Replace the oil
pump.
EAS4C81012
CHECKING THE SPROCKET AND CHAIN
1. Check:
• Oil/water pump assembly drive sprocket “1”
Cracks/damage/wear → Replace the
defective part(-s).
Inner-rotor-to-outer-rotor-tip
clearance
0.010–0.100
mm
(0.0004–
0.0039 in)
Limit
0.180 mm (0.0071 in)
Outer-rotor-to-oil-pump-housing clearance
0.090–0.190
mm
(0.0035–
0.0074 in)
Limit
0.220 mm (0.0087 in)
Oil-pump-housing-to-inner-andouter-rotor clearance
0.06–0.13 mm (0.0024–0.0051
in)
Limit
0.200 mm (0.0079 in)
2. Check:
• Oil/water pump assembly drive chain “1”
Damage/stiffness → Replace the oil/water
pump assembly drive chain and oil/water
pump assembly drive sprocket as a set.
5-60
OIL PUMP
EAS24980
CHECKING THE OIL DELIVERY PIPES
The following procedure applies to all of the oil
delivery pipes.
1. Check:
• Oil delivery pipe “1”
• Oil pipe “2”
Damage → Replace.
Obstruction → Wash and blow out with
compressed air.
1. Inner rotor
2. Outer rotor
3. Oil pump housing
3. Check:
• Oil pump operation
Rough movement → Repeat steps (1) and
(2) or replace the defective part(s).
EAS24990
CHECKING THE OIL STRAINER
1. Check:
• Oil strainer “1”
Damage → Replace.
Contaminants → Clean with solvent.
EAS24970
CHECKING THE RELIEF VALVE
1. Check:
• Relief valve body “1”
• Relief valve “2”
• Spring “3”
• O-ring “4”
Damage/wear → Replace the defective
part(s).
EAS4C81013
CHECKING THE OIL NOZZLES
The following procedure applies to all of the oil
nozzles.
1. Check:
• Oil nozzle “1”
Damage/wear → Replace the oil nozzles.
5-61
OIL PUMP
• O-ring “2”
Damage/wear → Replace.
• Oil nozzle passage
Obstruction → Blow out with compressed
air.
Oil/water pump driven sprocket
bolt
15 Nm (1.5 m·kg, 11 ft·lb)
LOCTITE®
NOTE:
5VY mark of the oil/water pump driven gear is
installed at oil pump side.
EAS25010
ASSEMBLING THE OIL PUMP
1. Lubricate:
• Inner rotor
• Outer rotor
• Oil pump shaft
(with the recommended lubricant)
4. Check:
• Oil pump operation
Refer to "CHECKING THE OIL PUMP" on
page 5-60.
Recommended lubricant
Engine oil
2.
•
•
•
•
EAS25030
INSTALLING THE OIL/WATER PUMP
ASSEMBLY
1. Install:
Install:
Pin “1”
Inner rotor “2”
Outer rotor “3”
Oil pump housing “4”
•
•
•
•
Oil pump housing bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
LOCTITE®
Oil ring New
Oil/water pump assembly “1”
Dowel pin
Bolts “2”
Oil/water pump assembly bolt
12 Nm (1.2 m·kg, 8.7 ft·lb)
LOCTITE®
NOTE:
When installing the inner rotor, align the pin “1”
in the oil pump shaft with the groove “a” in the
inner rotor “2”.
2.
•
•
•
•
3. Install:
• Oil/water pump driven sprocket “1”
5-62
Install:
Washer
Oil/water pump assembly drive chain “1”
Oil/water pump assembly drive sprocket “2”
Collar
OIL PUMP
NOTE:
Install the oil/water pump assembly drive chain
“1” onto the oil/water pump assembly drive
sprocket “2”.
ECA4C81007
CAUTION:
After installing the oil/water pump assembly drive chain and drive sprocket, make
sure the oil/water pump turns smoothly.
5. Install:
• Relief valve “1”
• O-ring New
• Oil strainer “2”
Oil strainer bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
LOCTITE®
• O-ring New
• Oil pipe “3”
• O-ring New
• Drain pipe “4”
3. Install:
• Oil/water pump assembly drive chain guide
“1”
• O-ring New
Oil/water pump assembly drive
chain guide bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
LOCTITE®
NOTE:
“UP” mark of the oil/water pump assembly
drive chain guide is upward.
EAS25050
INSTALLING THE OIL PAN
1. Install:
• Dowel pins
• Gasket New
• Oil pan “1”
Oil pan bolt
12 Nm (1.2 m·kg, 8.7 ft·lb)
• Oil level switch “2”
4. Install:
• Oil delivery pipe “1”
Oil level switch bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
Oil delivery pipe bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
LOCTITE®
• Engine oil drain bolt
5-63
OIL PUMP
Engine oil drain bolt
43 Nm (4.3 m·kg, 31 ft·lb)
EWA12820
WARNING
Always use new copper washers.
NOTE:
• Tighten the oil pan bolts in stages and in a
crisscross pattern.
• Lubricate the oil level switch O-ring with
engine oil.
5-64
CRANKCASE
EAS25540
CRANKCASE
Separating the crankcase
Order
Job/Parts to remove
Air filter case
Throttle body assembly
Engine
Cylinder head
Generator
Starter clutch
Shift shaft
Q’ty
Crankshaft position sensor
Clutch
Oil pump
Starter motor
1
2
3
4
5
6
Timing chain
Timing chain guide (intake side)
Pin
Timing chain guide (exhaust side)
Left side cover
O-ring
1
1
2
1
1
1
5-65
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "THROTTLE BODIES" on page 7-4.
Refer to "ENGINE REMOVAL" on page 5-1
Refer to "CYLINDER HEAD" on page 5-18.
Refer to "GENERATOR" on page 5-30.
Refer to "STARTER CLUTCH" on page 5-34.
Refer to "SHIFT SHAFT" on page 5-54.
Refer to "CRANKSHAFT POSITION SENSOR" on page 5-37.
Refer to "CLUTCH" on page 5-44.
Refer to "OIL PUMP" on page 5-57.
Refer to "ELECTRIC STARTER" on page 539.
CRANKCASE
Separating the crankcase
Order
7
8
9
Job/Parts to remove
Lower crankcase
Dowel pin
Damper
Q’ty
1
3
1
Remarks
For installation, reverse the removal procedure.
5-66
CRANKCASE
EAS25550
NOTE:
DISASSEMBLING THE CRANKCASE
1. Place the engine upside down.
2. Remove:
• Crankcase bolts
Identify the position of each crankshaft journal
lower bearing so that it can be reinstalled in its
original place.
NOTE:
EAS25580
• Loosen each bolt 1/4 of a turn at a time, in
stages and in a crisscross pattern. After all of
the bolts are fully loosened, remove them.
• Loosen the bolts in decreasing numerical
order (refer to the numbers in the illustration).
• The numbers embossed on the crankcase
indicate the crankcase tightening sequence.
CHECKING THE CRANKCASE
1. Thoroughly wash the crankcase halves in a
mild solvent.
2. Thoroughly clean all the gasket surfaces
and crankcase mating surfaces.
3. Check:
• Crankcase
Cracks/damage → Replace.
• Oil delivery passages
Obstruction → Blow out with compressed
air.
M6 × 50 mm (2.0 in) bolts: “1”, “7”
M6 × 60 mm (2.4 in) bolts: “2”, “3”
M6 × 70 mm (2.8 in) bolts: “4”, “6”, “8”
M6 × 60 mm (2.4 in) bolt and washer: “5”
M6 × 65 mm (2.5 in) bolts: “9”, “10”
M8 × 60 mm (2.4 in) bolts: “11”, “15”
M8 × 50 mm (2.0 in) bolts: “12” – “14”
M8 × 60 mm (2.4 in) bolt: “16” LOCTITE®
M9 × 105 mm (4.1 in) bolts: “17” – “26”
EAS4C81014
CHECKING THE BEARING AND OIL SEALS
1. Check:
• Bearings
Clean and lubricate the bearings, then
rotate the inner race with your finger.
Rough movement → Replace.
2. Check:
• Oil seals
Damage/wear → Replace.
EAS25650
ASSEMBLING THE CRANKCASE
1. Lubricate:
• Crankshaft journal bearings
(with the recommended lubricant)
Recommended lubricant
Engine oil
2. Apply:
• Sealant
3. Remove:
• Lower crankcase
ECA13900
Yamaha bond No. 1215
(Three Bond No.1215®)
90890-85505
CAUTION:
Tap on one side of the crankcase with a
soft-face hammer. Tap only on reinforced
portions of the crankcase, not on the
crankcase mating surfaces. Work slowly
and carefully and make sure the crankcase
halves separate evenly.
4.
•
5.
•
NOTE:
Do not allow any sealant to come into contact
with the oil gallery or crankshaft journal bearings. Do not apply sealant to within 2–3 mm
(0.08–0.12 in) of the crankshaft journal bearings.
Remove:
Dowel pins
Remove:
Crankshaft journal lower bearing
(from the lower crankcase)
5-67
CRANKCASE
Crankcase bolt
Bolt “1”–“10”
1st: 20 Nm (2.0 m·kg, 14 ft·lb)
2nd*: 20 Nm (2.0 m·kg, 14 ft·lb)
3rd: +60°
Bolt “11”–“16”
24 Nm (2.4 m·kg, 17 ft·lb)
Bolt “17”–“26”
10 Nm (1.0 m·kg, 7.2 ft·lb)
*Following the tightening order, loosen the
bolt one by one and then retighten it to the
specific torque.
3. Install:
• Dowel pin
4. Set the shift drum assembly and transmission gears in the neutral position.
5. Install:
• Lower crankcase “1”
(onto the upper crankcase “2”)
ECA13980
CAUTION:
Before tightening the crankcase bolts,
make sure the transmission gears shift correctly when the shift drum assembly is
turned by hand.
6. Install:
• Crankcase bolts
NOTE:
•
•
•
•
Lubricate the bolt threads with engine oil.
Install a washer on bolts “1” – “10” and “22”.
Seal bolt “18”
Tighten the bolts in the tightening sequence
cast on the crankcase.
M9 × 105 mm (4.1 in) bolts: “1” – “10”
M8 × 60 mm (2.4 in) bolt: “11” LOCTITE®
M8 × 60 mm (2.4 in) bolts: “12”, “16”
M8 × 50 mm (2.0 in) bolts: “13” – “15”
M6 × 65 mm (2.5 in) bolts: “17”, “18”
M6 × 70 mm (2.8 in) bolts: “19”, “21”, “23”
M6 × 50 mm (2.0 in) bolts: “20”, “26”
M6 × 60 mm (2.4 in) bolt and washer: “22”
M6 × 60 mm (2.4 in) bolts: “24”, “25”
5-68
CRANKSHAFT
EAS25960
CRANKSHAFT
Removing the connecting rods and pistons
Order
1
2
3
4
5
6
7
8
9
10
11
12
Job/Parts to remove
Lower crankcase
Connecting rod cap
Big end lower bearing
Big end upper bearing
Piston pin clip
Piston pin
Piston
Connecting rod
Top ring
2nd ring
Oil ring
Cylinder
Cylinder gasket
Q’ty
Remarks
Refer to "CRANKCASE" on page 5-65.
4
4
4
8
4
4
4
4
4
4
1
1
For installation, reverse the removal procedure.
5-69
CRANKSHAFT
Removing the crankshaft
Order
Job/Parts to remove
Lower crankcase
Q’ty
Connecting rod and connecting rod caps
1
2
3
4
5
6
7
Crankshaft
Crankshaft journal lower bearing
Crankshaft journal upper bearing
Washer
Crankshaft drive gear
Pin
Pickup rotor
Remarks
Refer to "CRANKCASE" on page 5-65.
Refer to "REMOVING THE CONNECTING
RODS AND PISTONS" on page 5-71.
1
5
5
1
1
1
1
For installation, reverse the removal procedure.
5-70
CRANKSHAFT
EAS26030
REMOVING THE CONNECTING RODS AND
PISTONS
The following procedure applies to all of the
connecting rods and pistons.
1. Remove:
• Connecting rod cap “1”
• Big end bearings
Piston pin puller set
90890-01304
Piston pin puller
YU-01304
NOTE:
• Identify the position of each big end bearing
so that it can be reinstalled in its original
place.
• After removing the connecting rods and connecting rod caps, care should be taken not to
damage the mating surfaces of the connecting rods and connecting rod caps.
2.
•
•
•
3.
•
•
•
4.
•
•
•
Remove:
Cylinder
Cylinder gasket
Cylinder stud bolts
Remove:
Piston pin clips “1”
Piston pin “2”
Piston “3”
Remove:
Top ring
2nd ring
Oil ring
NOTE:
When removing a piston ring, open the end
gap with your fingers and lift the other side of
the ring over the piston crown.
ECA4C81008
CAUTION:
Do not use a hammer to drive the piston
pin out.
NOTE:
• For reference during installation, put identification marks on the piston crown.
• Before removing the piston pin, deburr the
piston pin clip groove and the piston pin bore
area. If both areas are debarred and the piston pin is still difficult to remove, remove it
with the piston pin puller set “4”.
EAS25980
REMOVING THE CRANKSHAFT ASSEMBLY
1. Remove:
• Crankshaft assembly “1”
• Crankshaft journal upper bearings
(from the upper crankcase)
Refer to "CRANKSHAFT" on page 5-69.
5-71
CRANKSHAFT
b. If out of specification, rebore or replace the
cylinder, and replace the piston and piston
rings as a set.
c. Measure piston skirt diameter “P” with the
micrometer.
NOTE:
Identify the position of each crankshaft journal
upper bearing so that it can be reinstalled in its
original place.
Piston size “P”
Standard
76.975–76.990
3.0311 in)
EAS24390
CHECKING THE CYLINDER AND PISTON
1. Check:
• Piston wall
• Cylinder wall
Vertical scratches → Rebore or replace the
cylinder, and replace the piston and piston
rings as a set.
2. Measure:
• Piston-to-cylinder clearance
mm
(3.0305–
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Measure cylinder bore “C” with the cylinder
bore gauge.
NOTE:
Measure cylinder bore “C” by taking side-toside and front-to-back measurements of the
cylinder. Then, find the average of the measurements.
a. 12 mm (0.47 in) from the bottom edge of
the piston
d. If out of specification, replace the piston
and piston rings as a set.
e. Calculate the piston-to-cylinder clearance
with the following formula.
Bore
77.000–77.010 mm (3.0315–
3.0319 in)
Wear limit
77.060 mm (3.0339 in)
Taper limit “T”
0.050 mm (0.0020 in)
Out of round limit “R”
0.050 mm (0.0020 in)
Piston-to-cylinder clearance =
Cylinder bore “C” Piston skirt diameter “P”
Piston-to-cylinder clearance
0.010–0.035
mm
(0.0004–
0.0014 in)
Limit
0.120 mm (0.0047 in)
“C” = maximum of D1–D2
“T” = maximum of D1 or D2 - maximum of D5
or D6
f.
“R” = maximum of D1, D3 or D5 - minimum of
D2, D4 or D6
If out of specification, rebore or replace the
cylinder, and replace the piston and piston
rings as a set.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS24430
CHECKING THE PISTON RINGS
1. Measure:
• Piston ring side clearance
Out of specification → Replace the piston
and piston rings as a set.
NOTE:
Before measuring the piston ring side clearance, eliminate any carbon deposits from the
piston ring grooves and piston rings.
5-72
CRANKSHAFT
Piston ring side clearance
Top ring
0.030–0.065
mm
(0.0012–
0.0026 in)
Limit
0.115 mm (0.0045 in)
2nd ring
0.020–0.055
mm
(0.0008–
0.0022 in)
Limit
0.115 mm (0.0045 in)
Piston ring end gap
Top ring
0.15–0.25 mm (0.0059–0.0098
in)
Limit
0.50 mm (0.0197 in)
2nd ring
0.30–0.45 mm (0.0118–0.0177
in)
Limit
0.80 mm (0.0315 in)
Oil ring
0.10–0.40 mm (0.0039–0.0157
in)
EAS24440
CHECKING THE PISTON PIN
1. Check:
• Piston pin
Blue discoloration/grooves → Replace the
piston pin and then check the lubrication
system.
2. Measure:
• Piston pin outside diameter “a”
Out of specification → Replace the piston
pin.
2. Install:
• Piston ring
(into the cylinder)
NOTE:
Piston pin outside diameter
16.991–17.000 mm (0.6689–
0.6693 in)
Limit
16.971 mm (0.6682 in)
Level the piston ring into the cylinder with the
piston crown.
a. 5 mm (0.20 in)
3. Measure:
• Piston ring end gap
Out of specification → Replace the piston
ring.
3. Measure:
• Piston pin bore diameter “b”
Out of specification → Replace the piston.
NOTE:
Piston pin bore inside diameter
17.002–17.013 mm (0.6694–
0.6698 in)
Limit
17.043 mm (0.6710 in)
The oil ring expander spacer’s end gap cannot
be measured. If the oil ring rail’s gap is excessive, replace all three piston rings.
5-73
CRANKSHAFT
a. Clean the big end bearings, crankshaft
pins, and the inside of the connecting rods
halves.
b. Install the big end upper bearing into the
connecting rod and the big end lower bearing into the connecting rod cap.
NOTE:
Align the projections “a” on the big end bearings with the notches “b” in the connecting rod
and connecting rod cap.
4. Calculate:
• Piston-pin-to-piston-pin-bore clearance
Out of specification → Replace the piston
pin and piston as a set.
Piston-pin-to-piston-pin-bore clearance =
Piston pin bore diameter “b” Piston pin outside diameter “a”
Piston-pin-to-piston-pin-bore
clearance
0.002–0.022
mm
(0.0001–
0.0009 in)
Limit
0.072 mm (0.0028 in)
c. Put a piece of Plastigauge® “1” on the
crankshaft pin.
EAS4C81015
CHECKING THE BIG END BEARINGS
1. Measure:
• Crankshaft-pin-to-big-end-bearing clearance
Out of specification → Replace the big end
bearings.
Crankshaft-pin-to-big-end-bearing clearance
0.034–0.058 mm
(0.0013–0.0023 in)
Limit
0.09 mm (0.0035 in)
d. Assemble the connecting rod halves.
NOTE:
• Do not move the connecting rod or crankshaft until the clearance measurement has
been completed.
• Lubricate the bolt threads with molybdenum
disulfide grease.
• Make sure that the “Y” mark “c” on the connecting rod faces towards the left side of the
crankshaft.
• Make sure that the characters “d” on both the
connecting rod and connecting rod cap are
aligned.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
The following procedure applies to all of the
connecting rods.
ECA14900
CAUTION:
Do not interchange the big end bearings
and connecting rods. To obtain the correct
crankshaft-pin-to-big-end-bearing clearance and prevent engine damage, the big
end bearings must be installed in their original positions.
5-74
CRANKSHAFT
j.
Loosen the connecting rod bolt, remove the
connecting rod and connecting rod cap and
install these parts to the crankshaft with the
big end bearing kept in the current condition.
k. Tighten the connecting rod bolts.
Connecting rod bolt
20 Nm (2.0 m·kg, 14 ft·lb)
+150°
e. Tighten the connecting rod bolts.
NOTE:
Install by carrying out the following procedures
in order to assemble in the most suitable condition.
EC2D1082
CAUTION:
Tighten the connecting rod bolts using the
plastic-region tightening angle method.
Connecting rod bolt
29.4 Nm (3.0 m·kg, 21 ft·lb)
l. Clean the connecting rod bolts.
m. Tighten the connecting rod bolts.
n. Put a mark “1” on the corner of the connecting rod bolt “2” and the connecting rod
“3”.
NOTE:
• First, tighten the bolts to 15 Nm (1.5 m·kg, 11
ft·lb).
• Retighten the bolts to 29.4 Nm (3.0 m·kg, 21
ft·lb).
f.
g.
h.
i.
•
•
Replace the connecting rod bolts with new
ones.
Clean the connecting rod bolts.
After installing big end bearing, assemble
the connecting rod and connecting rod cap
once using a single unit of the connecting
rod.
Tighten the connecting rod bolt while
checking that the sections shown “a” and
“b” are flush with each other by touching
the surface.
Side machined face “a”
Thrusting faces (4 places at front and rear)
“b”
o. Tighten the bolt further to reach the specified angle (150° ).
NOTE:
To install the big end bearing, care should be
taken not to install it at an angle and the position should not be out of alignment.
5-75
CRANKSHAFT
p. After the installation, check that the section
shown “a” is flush with each other by touching the surface.
• Side machined face “a”
2. Select:
• Big end bearings (P1 – P4)
NOTE:
• The numbers “A” stamped into the crankshaft wed and the numbers “1” on the connecting rods are used to determine the
replacement big end bearings sizes.
• “P1” - ”P4” refer to the bearings shown in the
crankshaft illustration.
EW2D1008
WARNING
• When the bolt is tightened more than the
specified angle, do not loosen the bolt
and then retighten it.
Replace the bolt with a new one and perform the procedure again.
• If they are not flush with each other,
remove the connecting rod bolt and big
end bearing and restart from step “e”. In
this case, make sure to replace the connecting rod bolt.
For example, if the connecting rod “P1” and
the crankshaft web “P1” numbers are “5”
and “2” respectively, then the bearing size
for “P1” is:
“P1” (connecting rod) – “P1”
(crankshaft) =
5 – 2 = 3 (brown)
ECA4C81010
CAUTION:
• Do not use a torque wrench to tighten the
nut to the specified angle.
• Tighten the bolt until it is at the specified
angles.
Bearing color code
1.Blue
2.Black
4.Green
q. Remove the connecting rod and big end
bearings.
Refer to "REMOVING THE CONNECTING
RODS AND PISTONS" on page 5-71.
r. Measure the compressed Plastigauge®
width on the crankshaft pin.
If the crankshaft-pin-to-big-end-bearing
clearance is out of specification, select
replacement big end bearings.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
5-76
3.Brown
CRANKSHAFT
(with the recommended lubricant)
EAS26190
INSTALLING THE CONNECTING ROD AND
PISTON
The following procedure applies to all of the
connecting rods and pistons.
1. Install:
• Top ring “1”
• 2nd ring “2”
• Oil ring expander “4”
• Upper oil ring rail “3”
• Lower oil ring rail “5”
Recommended lubricant
Engine oil
4. Offset:
• Piston ring end gaps
NOTE:
Be sure to install the piston rings so that the
manufacturer’s marks or numbers “a” face up.
a.
b.
c.
d.
e.
A.
5.
•
•
•
2. Install:
• Piston “1”
(onto the respective connecting rod “2”)
• Piston pin “3”
Top ring
Lower oil ring rail
Upper oil ring rail
2nd ring
Oil ring expander
Exhaust side
Lubricate:
Crankshaft pins
Big end bearings
Connecting rod big end inner surface
(with the recommended lubricant)
Recommended lubricant
Engine oil
• Piston pin clip “4” New
NOTE:
• Apply engine oil onto the piston pin.
• Make sure that the “Y” mark “a” on the connecting rod faces left when the arrow mark
“b” on the piston is pointing up as shown.
• Reinstall each piston into its original cylinder
(numbering order starting from the left: #1 to
#4).
3.
•
•
•
6. Check:
• Cylinder stud bolts “1”
Cylinder stud bolt
8 Nm (0.8 m·kg, 5.8 ft·lb)
Lubricate:
Piston
Piston rings
Cylinder
7. Install:
• Cylinder gasket “2” New
5-77
CRANKSHAFT
NOTE:
• Install by carrying out the following procedures in order to assemble in the most suitable condition.
• First tighten the bolts to 15 Nm (1.5 m·kg, 11
ft·lb)
• Retighten the bolts to 29.4 Nm (3.0 m·kg, 21
ft·lb)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Replace the connecting rod bolts with new
ones.
b. Clean the connecting rod bolts.
c. After installing the big end bearing, assemble the connecting rod and connecting rod
cap once using a single unit of the connecting rod.
d. Tighten the connecting rod bolt while
checking that the sections shown “a” and
“b” are flush with each other by touching
the surface.
8. Install:
• Big end bearings
(onto the connecting rods and connecting
rod caps)
NOTE:
• Align the projections “a” on the big end bearings with the notches “b” in the connecting
rods and connecting rod caps.
• Be sure to reinstall each big end bearing in
its original place.
• Make sure that the characters “c” a on both
the connecting rod and connecting rod cap
are aligned.
NOTE:
To install the big end bearing, care should be
taken not to install it at an angle and the position should not be out of alignment.
a. Side machined face
b. Thrusting faces (4 places at front and rear)
e. Loosen the connecting rod bolt, remove the
connecting rod and connecting rod cap and
install these parts to the crankshaft with the
big end bearing kept in the current condition.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
10. Install:
• Piston assemblies “1”
(into the cylinder)
9. Tighten:
• Connecting rod bolts
Connecting rod bolt
29.4 Nm (3.0 m·kg, 21 ft·lb)
NOTE:
While compressing the piston rings with one
hand, install the connecting rod assembly into
the cylinder with the other hand.
5-78
CRANKSHAFT
ECA14980
CAUTION:
Tighten the connecting rod bolts using the
plastic-region tightening angle method.
a. Clean the connecting rod bolts.
b. Tighten the connecting rod bolts.
c. Put a mark “1” on the connecting rod bolt
“2” and the connecting rod cap “3”.
11. Install:
• Cylinder assembly “1”
• Connecting rod caps “2”
NOTE:
• Make sure that the “Y” marks “a” on the connecting rods face towards the left side of the
crankshaft.
• Make sure that the characters on both the
connecting rod and connecting rod cap are
aligned.
d. Tighten the bolt further to reach the specified angle (150°).
e. After the installation, check that the section
shown “a” is flush with each other by touching the surface.
a. Side machined face
12. Tighten:
• Connecting rod bolts
EWA13990
WARNING
• When the bolt is tightened more than the
specified angle, do not loosen the bolt
and then retighten it. Replace the bolt
with a new one and perform the procedure again.
Connecting rod bolt
20 Nm (2.0 m·kg, 14 ft·lb)+150°
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
5-79
CRANKSHAFT
• If they are not flush with each other,
remove the connecting rod bolt and big
end bearing and restart from step “9”. In
this case, make sure to replace the connecting rod bolt.
ECA14680
CAUTION:
• Do not use a torque wrench to tighten the
bolt to the specified angle.
• Tighten the bolt until it is at the specified
angles.
EAS4C81018
CHECKING THE CRANKSHAFT JOURNAL
BEARINGS
1. Measure:
• Crankshaft-journal-to-crankshaft-journal
bearing clearance
Out of specification → Replace the crankshaft journal bearings.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS4C81016
CHECKING THE CRANKSHAFT
1. Measure:
• Crankshaft runout
Out of specification → Replace the crankshaft.
Crankshaft-journal-to-crankshaft-journal bearing clearance
0.014-0.037 mm
(0.0006-0.0015 in)
Limit
0.10 mm (0.0039 in)
Crankshaft runout
Less than 0.03 mm (0.0012 in)
ECA4C81011
CAUTION:
2.
•
•
•
Do not interchange the crankshaft journal
bearings. To obtain the correct crankshaftjournal-to-crankshaft-journal bearing clearance and prevent engine damage, the
crankshaft journal bearings must be
installed in their original positions.
Check:
Crankshaft journal surfaces
Crankshaft pin surfaces
Bearing surfaces
Scratches/wear → Replace the crankshaft.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Clean the crankshaft journal bearings,
crankshaft journals, and bearing portions of
the crankcase.
b. Place the upper crankcase upside down on
a bench.
c. Install the crankshaft journal upper bearings “1” and the crankshaft into the upper
crankcase.
EAS4C81017
CHECKING THE CRANKSHAFT DRIVE
SPROCKET
1. Check:
• Crankshaft drive sprocket “1”
Cracks/damage/wear → Replace the
defective part(s).
NOTE:
Align the projections “a” on the crankshaft journal upper bearings with the notches “b” in the
upper crankcase.
5-80
CRANKSHAFT
Crankcase bolt
Bolt “1”–“10”
1st: 20 Nm (2.0 m·kg, 14 ft·lb)
2nd: 20 Nm (2.0 m·kg, 14 ft·lb)
3rd: +60°
Bolt “11”–“16”
24 Nm (2.4m·kg, 17 ft·lb)
Bolt “17”–“26”
10 Nm (1.0m·kg, 7.2 ft·lb)
M9 × 105 mm (4.1 in) bolts: “1”–“10”
M8 × 60 mm (2.4 in) bolt: “11” LOCTITE®
M8 × 60 mm (2.4 in) bolts: “12”, “16”
M8 × 50 mm (2.0 in) bolts: “13”–“15”
M6 × 65 mm (2.5 in) bolts: “17”, “18”
M6 × 70 mm (2.8 in) bolts: “19”, “21”, “23”
M6 × 50 mm (2.0 in) bolts: “20”, “26”
M6 × 60 mm (2.4 in) bolt and washer: “22”
M6 × 60 mm (2.4 in) bolts: “24”, “25”
* Following the tightening order, loosen the
bolt one by one and then retighten it to the
specific torque.
d. Put a piece of Plastigauge® “2” on each
crankshaft journal.
NOTE:
Do not put the Plastigauge® over the oil hole in
the crankshaft journal.
NOTE:
Lubricate the crankcase bolt threads with
engine oil.
Refer to "CRANKCASE" on page 5-65.
e. Install the crankshaft journal lower bearings “1” into the lower crankcase and
assemble the crankcase halves.
NOTE:
• Align the projections “a” of the crankshaft
journal lower bearings with the notches “b” in
the lower crankcase.
• Do not move the crankshaft until the clearance measurement has been completed.
f.
g. Remove the lower crankcase and the
crankshaft journal lower bearings.
h. Measure the compressed Plastigauge®
width “c” on each crankshaft journal.
If the crankshaft-journal-to-crankshaft-journal bearing clearance is out of specification, select replacement crankshaft journal
bearings.
Tighten the bolts to specification in the
tightening sequence cast on the crankcase.
5-81
CRANKSHAFT
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Select:
• Crankshaft journal bearings (J1–J5)
NOTE:
• The numbers “A” stamped into the crankshaft web and the numbers “1” stamped into
the lower crankcase are used to determine
the replacement crankshaft journal bearing
sizes.
• “J1–J5” refer to the bearings shown in the
crankshaft illustration.
• If “J1–J5” are the same, use the same size
for all of the bearings.
• If the size is the same for all “J1 to J5” one
digit for that size is indicated. (Crankcase
side only)
EAS26200
INSTALLING THE CRANKSHAFT
1. Install:
• Crankshaft journal upper bearings “1”
(into the upper crankcase)
For example, if the crankcase “J1” and
crankshaft web “J1” numbers are “6” and
“2” respectively, then the bearing size for
“J1” is:
“J1” (crankcase) – “J1”
(crankshaft web) – 1 =
6 – 2 – 1 = 3 (brown)
CRANKSHAFT JOURNAL BEARING
COLOR CODE
0
White
1
Blue
2
Black
3
Brown
4
Green
2. Lubricate:
• Crankshaft journal upper bearings
(with the recommended lubricant)
Recommended lubricant
Engine oil
5-82
CRANKSHAFT
NOTE:
• Align the projections “a” on the crankshaft
journal upper bearings with the notches “b” in
the upper crankcase.
• Be sure to install each crankshaft journal
upper bearing in its original place.
3.
•
4.
•
5.
•
•
•
Install:
Crankshaft
Install:
Crankcase (lower)
Refer to "CRANKCASE" on page 5-65.
Install:
Pin
Pickup rotor “1”
Drive sprocket “2”
Drive sprocket bolt
60 Nm (6.0 m·kg, 43 ft·lb)
5-83
TRANSMISSION
EAS26240
TRANSMISSION
Removing the transmission, shift drum assembly, and shift forks
Order
Job/Parts to remove
Q’ty
Lower crankcase
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Drive axle assembly
Circlip
Oil seal
Bearing
Washer
Shift fork guide bar retainer
Spring
Shift fork guide bar
Shift fork-L
Shift fork-R
Shift drum assembly
Shift fork-C
Main axle retainer
Main axle assembly
Oil pipe
O-ring
Oil baffle plate
1
1
1
1
1
2
2
2
1
1
1
1
1
1
1
2
1
5-84
Remarks
Separate.
Refer to "CRANKCASE" on page 5-65.
TRANSMISSION
Removing the transmission, shift drum assembly, and shift forks
Order
Job/Parts to remove
Q’ty
5-85
Remarks
For installation, reverse the removal procedure.
TRANSMISSION
Disassembling the main axle assembly
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Job/Parts to remove
2nd pinion gear
Toothed lock washer
Toothed lock washer retainer
6th pinion gear
Collar
Washer
Circlip
3rd pinion gear
Circlip
Washer
5th pinion gear
Collar
Main axle
Bearing housing
Bearing
Q’ty
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Remarks
For assembly, reverse the disassembly procedure.
5-86
TRANSMISSION
Disassembling the drive axle assembly
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Job/Parts to remove
Q’ty
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Washer
1st wheel gear
Collar
5th wheel gear
Circlip
Washer
3rd wheel gear
Collar
Toothed lock washer
Toothed lock washer retainer
4th wheel gear
Collar
Washer
Circlip
6th wheel gear
Circlip
Washer
Collar
2nd wheel gear
Collar
Oil seal
Bearing
Drive axle
5-87
Remarks
TRANSMISSION
Disassembling the drive axle assembly
Order
Job/Parts to remove
Q’ty
5-88
Remarks
For assembly, reverse the disassembly procedure.
TRANSMISSION
EAS26250
REMOVING THE TRANSMISSION
1. Remove:
• Drive axle assembly “1”
• Shift drum retainers “2”
• Shift fork guide bars
• Shift fork “L” and “R”
• Shift drum assembly
• Shift fork “C”
EAS26260
CHECKING THE SHIFT FORKS
The following procedure applies to all of the
shift forks.
1. Check:
• Shift fork cam follower “1”
• Shift fork pawl “2”
Bends/damage/scoring/wear → Replace
the shift fork.
2. Remove:
• Bearing housing “1”
• Main axle assembly “2”
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Insert two bolts “3” of the proper size, as
shown in the illustration, into the main axle
assembly bearing housing.
2. Check:
• Shift fork guide bar
Roll the shift fork guide bar on a flat surface.
Bends → Replace.
EWA12840
WARNING
Do not attempt to straighten a bent shift
fork guide bar.
b. Tighten the bolts until they contact the
crankcase surface.
c. Continue tightening the bolts until the main
axle assembly comes free from the upper
crankcase.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Remove:
• Oil pipe “1”
• Bearing “2”
5-89
TRANSMISSION
3. Check:
• Shift fork movement
(along the shift fork guide bar)
Rough movement → Replace the shift
forks and shift fork guide bar as a set.
2. Measure:
• Drive axle runout
(with a centering device and dial gauge “1”)
Out of specification → Replace the drive
axle.
EAS26270
CHECKING THE SHIFT DRUM ASSEMBLY
1. Check:
• Shift drum groove
Damage/scratches/wear → Replace the
shift drum assembly.
• Shift drum segment “1”
Damage/wear → Replace the shift drum
assembly.
• Shift drum bearing “2”
Damage/pitting → Replace the shift drum
assembly.
Drive axle runout limit
0.08 mm (0.0032 in)
3. Check:
• Transmission gears
Blue discoloration/pitting/wear → Replace
the defective gear(s).
• Transmission gear dogs
Cracks/damage/rounded edges → Replace
the defective gear(s).
EAS26300
CHECKING THE TRANSMISSION
1. Measure:
• Main axle runout
(with a centering device and dial gauge “1”)
Out of specification → Replace the main
axle.
Main axle runout limit
0.08 mm (0.0032 in)
5-90
TRANSMISSION
EAS26350
INSTALLING THE TRANSMISSION
1. Install:
• Bearing “1”
NOTE:
Make the seal side of bearing face to the outside and install it close to the right end face of
the crankcase.
• Oil pipe “2”
3.
•
•
•
•
Install:
Shift fork “L” “1” and “R” “2”
Drive axle assembly “3”
Shift fork guide bar
Shift fork guide bar retainer “4”
Shift fork guide bar retainer bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
LOCTITE®
NOTE:
2. Install:
• Main axle assembly “1”
• Bearing housing “2”
• Install shift fork “L” into the groove in the 6th
wheel gear and shift fork “R” into the groove
in the 5th wheel gear on the drive axle.
• Make sure that the drive axle bearing circlip
“a” is inserted into the grooves in the upper
crankcase.
Bearing housing bolt
12 Nm (1.2 m·kg, 8.7 ft·lb)
LOCTITE®
•
•
•
•
Shift fork “C”
Shift drum assembly
Shift fork guide bar
Shift fork guide bar retainer
Shift fork guide bar retainer bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
LOCTITE®
NOTE:
• The embossed marks on the shift forks
should face towards the right side of the
engine and be in the following sequence: “R”,
“C”, “L”.
• Carefully position the shift forks so that they
are installed correctly into the transmission
gears.
• Install shift fork “C” into the groove in the 3rd
and 4th pinion gear on the main axle.
5-91
TRANSMISSION
4. Check:
• Transmission
Rough movement → Repair.
NOTE:
Oil each gear, shaft, and bearing thoroughly.
5-92
TRANSMISSION
5-93
COOLING SYSTEM
RADIATOR....................................................................................................6-1
CHECKING THE RADIATOR..................................................................6-3
INSTALLING THE RADIATOR ................................................................6-3
OIL COOLER ................................................................................................6-4
CHECKING THE OIL COOLER..............................................................6-5
INSTALLING THE OIL COOLER ............................................................6-5
THERMOSTAT ..............................................................................................6-6
CHECKING THE THERMOSTAT............................................................6-8
ASSEMBLING THE THERMOSTAT ASSEMBLY ...................................6-8
INSTALLING THE THERMOSTAT ASSEMBLY ......................................6-8
WATER PUMP ..............................................................................................6-9
DISASSEMBLING THE WATER PUMP................................................6-10
CHECKING THE WATER PUMP ..........................................................6-10
ASSEMBLING THE WATER PUMP......................................................6-10
6
RADIATOR
EAS26380
RADIATOR
Removing the radiator
Order
Job/Parts to remove
Q’ty
Rider seat
Side cowling
Coolant
1
2
3
4
5
6
7
8
9
10
Fuel tank
Air filter case
Radiator fan coupler
Fuse holder stay
Coolant reservoir tank
Coolant reservoir hose
Radiator inlet hose
Oil cooler outlet hose
Radiator outlet hose
Water pump inlet pipe
O-ring
Radiator
2
1
1
1
1
1
1
1
1
1
6-1
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Drain.
Refer to "CHANGING THE COOLANT" on
page 3-19.
Refer to "FUEL TANK" on page 7-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Disconnect.
RADIATOR
Removing the radiator
Order
11
Job/Parts to remove
Radiator fan motor
Q’ty
2
Remarks
For installation, reverse the removal procedure.
6-2
RADIATOR
EAS26390
CHECKING THE RADIATOR
1. Check:
• Radiator fins
Obstruction → Clean.
Apply compressed air to the rear of the
radiator.
Damage → Repair or replace.
NOTE:
Straighten any flattened fins with a thin, flathead screwdriver.
b. Apply the specified pressure for ten seconds and make sure there is no drop in
pressure.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
4. Check:
• Radiator fan
Damage → Replace.
Malfunction → Check and repair.
Refer to "RADIATOR" on page 6-1.
EAS26400
INSTALLING THE RADIATOR
1. Fill:
• Cooling system
(with the specified amount of the recommended coolant)
Refer to "CHANGING THE COOLANT" on
page 3-19.
2. Check:
• Cooling system
Leaks → Repair or replace any faulty part.
2. Check:
• Radiator hoses
• Radiator pipes
Cracks/damage → Replace.
3. Measure:
• Radiator cap opening pressure
Below the specified pressure → Replace
the radiator cap.
Radiator cap opening pressure
108–137 kPa (15.4–19.5 psi)
(1.08–1.37 kgf/cm²)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Install the radiator cap tester “1” and radiator cap tester adapter “2” to the radiator
cap “3”.
Radiator cap tester
90890-01325
YU-24460-01
Radiator cap tester adapter
90890-01352
YU-33984
6-3
OIL COOLER
EAS26410
OIL COOLER
Removing the oil cooler
Order
Job/Parts to remove
Q’ty
Engine oil
Coolant
1
2
3
4
5
6
7
8
9
10
11
12
Oil cooler inlet hose
Oil cooler bolt
Washer
Oil cooler
O-ring
Water pump outlet pipe
O-ring
Water jacket joint inlet hose
O-ring
Water jacket joint
Stay
O-ring
1
1
1
1
1
1
1
1
1
1
1
1
Remarks
Drain.
Refer to "CHANGING THE ENGINE OIL" on
page 3-11.
Drain.
Refer to "CHANGING THE COOLANT" on
page 3-19.
Loosen.
Disconnect.
Disconnect.
For installation, reverse the removal procedure.
6-4
OIL COOLER
3. Fill:
• Cooling system
(with the specified amount of the recommended coolant)
Refer to "CHANGING THE COOLANT" on
page 3-19.
• Crankcase
(with the specified amount of the recommended engine oil)
Refer to "CHANGING THE ENGINE OIL"
on page 3-11.
4. Check:
• Cooling system
Leaks → Repair or replace any faulty part.
EAS26420
CHECKING THE OIL COOLER
1. Check:
• Oil cooler
Cracks/damage → Replace.
2. Check:
• Oil cooler inlet hose
• Oil cooler outlet hose
Cracks/damage/wear → Replace.
EAS26430
INSTALLING THE OIL COOLER
1. Clean:
• Mating surfaces of the oil cooler and the
crankcase
(with a cloth dampened with lacquer thinner)
2. Install:
• O-ring New
• Oil cooler “1”
• Washer “2” New
• Oil cooler bolt “3”
Oil cooler
63 Nm (6.3 m·kg, 46 ft·lb)
NOTE:
• Before installing the oil cooler, lubricate the
oil cooler bolt and O-ring with a thin coat of
engine oil.
• Make sure the O-ring is positioned properly.
• Align the projection “a” on the oil cooler with
the slot “b” in the crankcase.
6-5
THERMOSTAT
EAS26440
THERMOSTAT
Removing the thermostat assembly
Order
Job/Parts to remove
Rider seat
Fuel tank
Air filter case
Q’ty
Coolant
1
2
3
4
5
Thermostat assembly outlet hose
Thermostat assembly breather hose
Thermostat assembly
Thermostat assembly inlet hose
Band
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "FUEL TANK" on page 7-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "CHANGING THE COOLANT" on
page 3-19.
1
1
1
1
1
For installation, reverse the removal procedure.
6-6
THERMOSTAT
Disassembling the thermostat assembly
Order
1
2
3
4
Job/Parts to remove
Thermostat housing cover
Thermostat
Thermostat housing
O-ring
Q’ty
1
1
1
1
Remarks
For assembly, reverse the disassembly procedure.
6-7
THERMOSTAT
2. Check:
• Thermostat housing cover “1”
• Thermostat housing “2”
Cracks/damage → Replace.
EAS26450
CHECKING THE THERMOSTAT
1. Check:
• Thermostat
Does not open at 71–85°C (160–185°F) →
Replace.
EAS26460
ASSEMBLING THE THERMOSTAT ASSEMBLY
1. Install:
• Thermostat housing “1”
• Thermostat “2”
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Suspend the thermostat “1” in a container
“2” filled with water.
b. Slowly heat the water “3”.
c. Place a thermometer “4” in the water.
d. While stirring the water, observe the thermostat and thermometer’s indicated temperature.
• O-ring “3” New
• Thermostat housing cover “4”
Thermostat housing cover nut
10 Nm (1.0 m·kg, 7.2 ft·lb)
NOTE:
Install the thermostat with its breather hole “a”
facing up.
EAS26480
INSTALLING THE THERMOSTAT ASSEMBLY
1. Fill:
• Cooling system
(with the specified amount of the recommended coolant)
Refer to "CHANGING THE COOLANT" on
page 3-19.
2. Check:
• Cooling system
Leaks → Repair or replace any faulty part.
A. Fully closed
B. Fully open
NOTE:
If the accuracy of the thermostat is in doubt,
replace it. A faulty thermostat could cause serious overheating or over cooling.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
6-8
WATER PUMP
EAS26500
WATER PUMP
Disassembling the water pump
Order
1
2
3
4
5
6
7
8
Job/Parts to remove
Oil/water pump assembly
Oil pump rotor
Water pump cover
O-ring
Pin
Impeller shaft (along with the impeller)
Water pump seal
Oil seal
Bearing
O-ring
Q’ty
Remarks
Refer to "OIL PUMP" on page 5-57.
Refer to "OIL PUMP" on page 5-57.
1
1
2
1
1
1
1
1
For installation, reverse the removal procedure.
6-9
WATER PUMP
EAS26520
DISASSEMBLING THE WATER PUMP
1. Remove:
• Water pump seal “1”
• Water pump housing “2”
NOTE:
Tap out the bearing and oil seal from the outside of the water pump housing.
EAS26540
2.
•
•
•
CHECKING THE WATER PUMP
1. Check:
• Water pump housing cover “1”
• Water pump housing “2”
• Impeller shaft “3”
• Rubber damper “4”
• Rubber damper holder “5”
• Water pump seals
• Oil seal
Cracks/damage/wear → Replace.
Remove:
Oil seal “1”
Bearing “2”
Water pump housing “3”
NOTE:
Tap out the bearing and oil seal from the outside of the water pump housing.
2. Check:
• Bearing
Rough movement → Replace.
3. Check:
• Water pump outlet pipe
• Radiator outlet hose
Cracks/damage/wear → Replace.
3. Remove:
• Rubber damper holder “1”
• Rubber damper “2”
(from the impeller, with a thin, flat-head
screwdriver)
EAS26560
ASSEMBLING THE WATER PUMP
1. Install:
• Oil seal “1” New
(into the water pump housing “2”)
NOTE:
Do not scratch the impeller shaft.
NOTE:
• Before installing the oil seal, apply tap water
or coolant onto its out surface.
• Install the oil seal with a socket that matches
its outside diameter.
6-10
WATER PUMP
NOTE:
Before installing the rubber damper, apply tap
water or coolant onto its outer surface.
a. 17.2 mm (0.68 in)
2. Install:
• Water pump seal “1” New
ECA14080
CAUTION:
Never lubricate the water pump seal surface with oil or grease.
4. Measure:
• Impeller shaft tilt
Out of specification → Repeat steps (3)
and (4).
NOTE:
• Install the water pump seal with the special
tools.
• Before installing the water pump seal, apply
Yamaha bond No.1215 (Three Bond
No.1215®) “2” to the water pump housing
“3”.
ECA14090
CAUTION:
Make sure the rubber damper and rubber
damper holder are flush with the impeller.
Impeller shaft tilt limit
0.15 mm (0.006 in)
Mechanical seal installer “4”
90890-04078
Water pump seal installer
YM-33221-A
Middle driven shaft bearing
driver “5”
90890-04058
Bearing driver 40 mm
YM-04058
Yamaha bond No. 1215 (Three
Bond No.1215®)
90890-85505
1. Straightedge
2. Impeller
A. Push down
3. Install:
• Rubber damper holder “1” New
• Rubber damper “2” New
6-11
FUEL SYSTEM
FUEL TANK ..................................................................................................7-1
REMOVING THE FUEL TANK ................................................................7-2
REMOVING THE FUEL PUMP...............................................................7-2
CHECKING THE FUEL PUMP BODY ....................................................7-2
CHECKING THE FUEL PUMP OPERATION .........................................7-2
INSTALLING THE FUEL PUMP..............................................................7-2
INSTALLING THE FUEL TANK...............................................................7-3
THROTTLE BODIES.....................................................................................7-4
CHECKING THE INJECTORS ...............................................................7-6
CHECKING THE THROTTLE BODIES ..................................................7-6
CHECKING THE FUEL PRESSURE......................................................7-6
ADJUSTING THE THROTTLE POSITION SENSOR
(FOR THROTTLE VALVES)....................................................................7-6
ADJUSTING THE THROTTLE POSITION SENSOR
(FOR THROTTLE CABLE PULLEY).......................................................7-7
AIR INDUCTION SYSTEM ...........................................................................7-9
CHECKING THE AIR INDUCTION SYSTEM .......................................7-10
7
FUEL TANK
EAS26620
FUEL TANK
Removing the fuel tank
Order
1
2
3
4
5
6
7
8
9
10
11
Job/Parts to remove
Rider seat
Passenger seat
Fuel tank side cover
Fuel sender coupler
Fuel pump coupler
Fuel tank drain hose
Fuel tank breather hose
Fuel tank breather hose (fuel tank to rollover
valve)
Fuel hose connector
Fuel hose
Fuel tank
Fuel tank top cover
Fuel pump
Q’ty
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "GENERAL CHASSIS" on page 4-1.
2
1
1
1
1
1
1
1
1
1
1
For installation, reverse the removal procedure.
7-1
FUEL TANK
EAS26630
EAS26640
REMOVING THE FUEL TANK
1. Extract the fuel in the fuel tank through the
fuel tank cap with a pump.
2. Remove:
• Fuel hose connector cover
• Fuel hose
• Fuel sender coupler
• Fuel pump coupler
• Fuel tank drain hose
• Fuel tank breather hose
• Fuel tank side cover
REMOVING THE FUEL PUMP
1. Remove:
• Fuel pump
ECA14720
CAUTION:
• Do not drop the fuel pump or give it a
strong shock.
• Do not touch the base section of the fuel
sender.
EAS26670
CHECKING THE FUEL PUMP BODY
1. Check:
• Fuel pump body
Obstruction → Clean.
Cracks/damage → Replace the fuel pump
assembly.
2. Check:
• Diaphragms and gaskets
Turn/fatigue/cracks → Replace the fuel
pump assembly.
ECA4C81002
CAUTION:
• Be sure to disconnect the fuel hose by
hand. Do not forcefully disconnect the
hose with tools.
• Although the fuel has been removed from
the fuel tank be careful when removing
the fuel hoses, since there may be fuel
remaining in it.
NOTE:
EAS26690
• To remove the fuel hose from the fuel injection pipe, slide the cover “a” on the end of the
hose in the direction of the arrow shown and
then remove the hose.
• Before removing the hoses, place a few rags
in the area under where it will be removed.
CHECKING THE FUEL PUMP OPERATION
1. Check:
• Fuel pump operation
Refer to "CHECKING THE FUEL PRESSURE" on page 7-6.
EAS26710
INSTALLING THE FUEL PUMP
1. Install:
• Fuel pump
Fuel pump bolt
4 Nm (0.4 m·kg, 2.9 ft·lb)
NOTE:
• Do not damage the installation surface of the
fuel tank when installing the fuel pump.
• Always use a new fuel pump gasket.
• Install the fuel pump as shown in the illustration.
• Align the projection “a” on the fuel pump with
the slot in the fuel pump bracket.
• Tighten the fuel pump bolts in stages in a
crisscross pattern and to the specified
torque.
3. Remove:
• Fuel tank
NOTE:
Do not set the fuel tank down so that the installation surface of the fuel pump is directly under
the tank. Be sure to lean the fuel tank in an
upright position.
7-2
FUEL TANK
EAS4C81002
INSTALLING THE FUEL TANK
1. Install:
• Fuel hose
• Fuel hose connector cover
ECA14740
CAUTION:
When installing the fuel hose, make sure
that it is securely connected, and that the
fuel hose holders are in the correct position, otherwise the fuel hose will not be
properly installed.
NOTE:
Install the fuel hose connector securely onto
the fuel tank until a distinct “click” is heard, and
then make sure that it does not come loose. To
install the fuel hose from the fuel injection
hose, slide the cover “a” on the end of the hose
in the direction of arrow shown.
2.
•
•
•
•
•
Install:
Fuel sender coupler
Fuel pump coupler
Fuel tank breather hose
Fuel tank drain hose
Fuel tank side cover
NOTE:
There is white paint mark on the fuel tank
breather hose.
Refer to "CABLE ROUTING" on page 2-39.
7-3
THROTTLE BODIES
EAS26970
THROTTLE BODIES
Removing the throttle bodies
Order
1
2
3
4
5
6
7
8
9
10
11
12
Job/Parts to remove
Q’ty
Rider seat
Fuel tank
Air filter case
Sub-wire harness coupler
1
Coolant temperature sensor coupler
1
Throttle servo motor coupler
1
Throttle position sensor (for throttle valves) cou1
pler
Throttle position sensor (for throttle cable pulley)
1
coupler
Throttle body joint clamp
4
Throttle cables
2
Throttle bodies
1
Throttle body joint
3
Engine ground
2
Heat protector
1
Fuel hose
1
Remarks
Refer to "GENERAL CHASSIS" on page 4-1.
Refer to "FUEL TANK" on page 7-1.
Refer to "GENERAL CHASSIS" on page 4-1.
Disconnect.
Disconnect.
Disconnect.
Disconnect.
Disconnect.
Loosen.
Disconnect.
For installation, reverse the removal procedure.
7-4
THROTTLE BODIES
Removing the injectors
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
Job/Parts to remove
Q’ty
Intake air pressure sensor coupler
1
Cylinder #1-injector coupler
1
Cylinder #2-injector coupler
1
Cylinder #3-injector coupler
1
Cylinder #4-injector coupler
1
Sub-wire harness
1
Negative pressure hose
1
Intake air pressure sensor
1
Fuel distributor
1
Injector
4
Throttle position sensor (for throttle valves)
1
Throttle position sensor (for throttle cable pulley)
1
Throttle body assembly
1
Remarks
Disconnect.
Disconnect.
Disconnect.
Disconnect.
Disconnect.
Disconnect.
For installation, reverse the removal procedure.
7-5
THROTTLE BODIES
EAS26980
CHECKING THE INJECTORS
1. Check:
• Injectors
Damage → Replace.
c. Connect the pressure gauge “2” and
adapter “3” to the fuel hose (fuel tank to primary injector fuel rail).
EAS26990
CHECKING THE THROTTLE BODIES
1. Check:
• Throttle bodies
Cracks/damage → Replace the throttle
bodies as a set.
2. Check:
• Fuel passages
Obstructions → Clean.
Pressure gauge
90890-03153
YU-03153
Fuel pressure adapter
90890-03176
YM-03176
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Wash the throttle bodies in a petroleumbased solvent.
Do not use any caustic carburetor cleaning
solution.
b. Blow out all of the passages with compressed air.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS4S81001
CHECKING THE FUEL PRESSURE
1. Check:
• Fuel pressure
d. Start the engine.
e. Measure the fuel pressure.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the rider and passenger seat.
Refer to "GENERAL CHASSIS" on page 41.
b. Disconnect the fuel hose (fuel tank to primary injector fuel rail) “1” from the primary
injector fuel rail.
Fuel pressure
324 kPa (46.1 psi) (3.24 kg/
cm2)
Faulty → Replace fuel pump.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EWA4C81001
WARNING
EAS27030
ADJUSTING THE THROTTLE POSITION
SENSOR (FOR THROTTLE VALVES)
1. Check:
• Throttle position sensor (for throttle valves)
Refer to "CHECKING THE THROTTLE
POSITION SENSOR (FOR THROTTLE
VALVES)" on page 8-89.
2. Adjust:
• Throttle position sensor angle
Cover fuel hose connections with a cloth
when disconnecting them. Residual pressure in the fuel lines could cause fuel to
spurt out when removing the hoses.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
7-6
THROTTLE BODIES
a. Temporary tighten the throttle position sensor (for throttle valves).
b. Check that the throttle valves are fully
closed.
c. Connect the throttle position sensor (for
throttle valves), throttle position sensor (for
throttle cable pulley) and throttle servo
motor to the wire harness.
d. Turn the main switch to “OFF” and set the
engine stop switch to “ON”.
e. Simultaneously press and hold the
“SELECT” and “RESET” buttons, turn the
main switch to "ON", and continue to press
the buttons for 8 seconds more.
EAS4C81023
ADJUSTING THE THROTTLE POSITION
SENSOR (FOR THROTTLE CABLE PULLEY)
1. Check:
• Throttle position sensor (for throttle cable
pulley)
Refer to "ADJUSTING THE THROTTLE
POSITION SENSOR (FOR THROTTLE
CABLE PULLEY)" on page 7-7.
2. Adjust:
• Throttle position sensor (for throttle cable
pulley) angle
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Temporary tighten the throttle position sensor (for throttle cable pulley).
b. Check that the throttle valves are fully
closed.
c. Connect the throttle position sensor (for
throttle valves), throttle position sensor (for
throttle cable pulley) and throttle servo
motor to the wire harness.
d. Turn the main switch to “OFF” and set the
engine stop switch to “ON”.
e. Simultaneously press and hold the
“SELECT” and “RESET” buttons, turn the
main switch to "ON", and continue to press
the buttons for 8 seconds more.
Simultaneously press and hold the
“SELECT” and “RESET” buttons, turn the
main switch to "ON", and continue to press
the buttons for 8 seconds more.
NOTE:
“dIAG” appears on the odometer, tripmeter and
fuel reserve trip LCD.
f. Diagnostic code 01 is selected.
g. Adjust the position of the throttle position
sensor angle so that 16 can appear in the
meter.
h. After adjusting the throttle position sensor
angle, tighten the throttle position sensor
screws “1”.
NOTE:
“dIAG” appears on the odometer, tripmeter and
fuel reserve trip LCD.
f. Diagnostic code 14 is selected.
g. Adjust the position of the throttle position
sensor angle so that 17 can appear in the
meter.
h. After adjusting the throttle position sensor
angle, tighten the throttle position sensor
screws “1”.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
7-7
THROTTLE BODIES
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
7-8
AIR INDUCTION SYSTEM
EAS27040
AIR INDUCTION SYSTEM
Removing the air cut-off valve assembly and hoses
Order
1
2
3
4
5
6
7
8
Job/Parts to remove
Air cut-off valve coupler
Air cut-off valve hose 1
Air cut-off valve hose 2
Air cut-off valve hose 3
Air cut-off valve
Reed valve cap
Reed valve assembly
Plate
Q’ty
1
1
1
1
1
2
2
4
Remarks
Disconnect.
Disconnect.
Disconnect.
Disconnect.
For installation, reverse the removal procedure.
7-9
AIR INDUCTION SYSTEM
EAS27060
A. From the air cleaner
B. To the cylinder head
CHECKING THE AIR INDUCTION SYSTEM
1. Check:
• Hoses
Loose connections → Connect properly.
Cracks/damage → Replace.
• Pipes
Cracks/damage → Replace.
2. Check:
• Reed valve “1”
• Reed valve stopper
• Reed valve seat
Cracks/damage → Replace the reed valve.
Air injection
The air induction system burns unburned
exhaust gases by injecting fresh air (secondary air) into the exhaust port, reducing the
emission of hydrocarbons. When there is negative pressure at the exhaust port, the reed
valve opens, allowing secondary air to flow into
the exhaust port. The required temperature for
burning the unburned exhaust gases is
approximately 600 to 700°C.
Air cut-off valve
The air cut-off valve is controlled by the signals
from the ECU in accordance with the combustion conditions. Ordinarily, the air cut-off valve
opens to allow the air to flow during idle and
closes to cut-off the flow when the vehicle is
being driven. However, if the coolant temperature is below the specified value, the air cut-off
valve remains open and allows the air to flow
into the exhaust pipe until the temperature
becomes higher than the specified value.
3. Measure:
• Reed valve bending limit “a”
Out of specification → Replace the reed
valve.
Reed valve bending limit
0.4 mm (0.016 in)
4. Check:
• Air cut-off valve
Cracks/damage → Replace.
5. Check
• Air induction system solenoid
Refer to "CHECKING THE AIR INDUCTION SYSTEM SOLENOID" on page 8-90.
7-10
AIR INDUCTION SYSTEM
7-11
ELECTRICAL SYSTEM
IGNITION SYSTEM.......................................................................................8-1
CIRCUIT DIAGRAM................................................................................8-1
TROUBLESHOOTING ............................................................................8-3
ELECTRIC STARTING SYSTEM..................................................................8-5
CIRCUIT DIAGRAM................................................................................8-5
STARTING CIRCUIT CUT-OFF SYSTEM OPERATION.........................8-7
TROUBLESHOOTING ............................................................................8-9
CHARGING SYSTEM .................................................................................8-11
CIRCUIT DIAGRAM..............................................................................8-11
TROUBLESHOOTING ..........................................................................8-13
LIGHTING SYSTEM ...................................................................................8-15
CIRCUIT DIAGRAM..............................................................................8-15
TROUBLESHOOTING ..........................................................................8-17
SIGNALING SYSTEM.................................................................................8-19
CIRCUIT DIAGRAM..............................................................................8-19
TROUBLESHOOTING ..........................................................................8-21
COOLING SYSTEM....................................................................................8-25
CIRCUIT DIAGRAM..............................................................................8-25
TROUBLESHOOTING ..........................................................................8-27
FUEL INJECTION SYSTEM .......................................................................8-29
CIRCUIT DIAGRAM..............................................................................8-29
ECU SELF-DIAGNOSTIC FUNCTION .................................................8-31
FAIL-SAFE ACTIONS
(SUBSTITUTE CHARACTERISTICS OPERATION CONTROL) ..........8-32
TROUBLESHOOTING METHOD .........................................................8-35
DIAGNOSTIC MODE............................................................................8-36
TROUBLESHOOTING DETAILS ..........................................................8-44
FUEL PUMP SYSTEM................................................................................8-65
CIRCUIT DIAGRAM..............................................................................8-65
TROUBLESHOOTING ..........................................................................8-67
ELECTRICAL COMPONENTS...................................................................8-69
CHECKING THE SWITCHES...............................................................8-73
CHECKING THE BULBS AND BULB SOCKETS.................................8-76
CHECKING THE FUSES......................................................................8-77
CHECKING AND CHARGING THE BATTERY.....................................8-77
CHECKING THE RELAYS....................................................................8-80
CHECKING THE TURN SIGNAL RELAY .............................................8-81
CHECKING THE RELAY UNIT (DIODE) ..............................................8-82
8
CHECKING THE IGNITION COILS ......................................................8-83
CHECKING THE CRANKSHAFT POSITION SENSOR .......................8-84
CHECKING THE LEAN ANGLE SENSOR ...........................................8-84
CHECKING THE STARTER MOTOR OPERATION..............................8-85
CHECKING THE STATOR COIL...........................................................8-85
CHECKING THE RECTIFIER/REGULATOR ........................................8-85
CHECKING THE HORN .......................................................................8-86
CHECKING THE OIL LEVEL SWITCH ................................................8-86
CHECKING THE FUEL SENDER ........................................................8-87
CHECKING THE SPEED SENSOR .....................................................8-87
CHECKING THE RADIATOR FAN MOTORS .......................................8-88
CHECKING THE COOLANT TEMPERATURE SENSOR ....................8-88
CHECKING THE THROTTLE POSITION SENSOR
(FOR THROTTLE CABLE PULLEY).....................................................8-89
CHECKING THE THROTTLE POSITION SENSOR
(FOR THROTTLE VALVES)..................................................................8-89
CHECKING THE AIR INDUCTION SYSTEM SOLENOID ...................8-90
CHECKING THE ATMOSPHERIC PRESSURE SENSOR...................8-90
CHECKING THE CYLINDER IDENTIFICATION SENSOR ..................8-91
CHECKING THE INTAKE AIR PRESSURE SENSOR .........................8-91
CHECKING THE INTAKE AIR TEMPERATURE SENSOR ..................8-91
IGNITION SYSTEM
EAS27090
IGNITION SYSTEM
EAS27110
CIRCUIT DIAGRAM
8-1
IGNITION SYSTEM
1. Main switch
4. Main fuse
7. Battery
11.Starting circuit cut-off relay
12.Neutral switch
13.Sidestand switch
18.ECU (engine control unit)
19.Ignition coil #1
20.Ignition coil #2
21.Ignition coil #3
22.Ignition coil #4
23.Spark plug
34.Crankshaft position sensor
39.Lean angle sensor
56.Engine stop switch
62.Clutch switch
77.Ignition fuse
85.Ground
86.Battery negative lead
8-2
IGNITION SYSTEM
EAS27150
TROUBLESHOOTING
The ignition system fails to operate (no spark or intermittent spark).
NOTE:
• Before troubleshooting, remove the following part(s):
1 Rider seat
2 Passenger seat
3 Fuel tank
4 Side cowlings
1 Check the fuses.
(Main and ignition)
Refer to "CHECKING THE FUSES"
on page 8-77.
NG→
Replace the fuse(s).
OK↓
2 Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-77.
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
OK↓
3 Check the spark plugs.
Refer to "CHECKING THE SPARK
PLUGS" on page 3-9.
NG→
Re-gap or replace the spark plugs.
OK↓
4 Check the ignition spark gap.
Refer to "CHECKING THE IGNITION COILS" on page 8-83.
NG→
Ignition system is OK.
OK↓
5 Check the ignition coils.
Refer to "CHECKING THE IGNITION COILS" on page 8-83.
NG→
Replace the ignition coils.
OK↓
6 Check the crankshaft position sensor.
Refer to "CHECKING THE
CRANKSHAFT POSITION SENSOR" on page 8-84.
NG→
Replace the crankshaft position sensor.
OK↓
7 Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the main switch.
OK↓
8-3
IGNITION SYSTEM
8 Check the engine stop switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the right handlebar switch.
OK↓
9 Check the neutral switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the neutral switch.
OK↓
10 Check the sidestand switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the sidestand switch.
OK↓
11 Check the clutch switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the clutch switch.
OK↓
12 Check the starting circuit cut-off
relay.
Refer to "CHECKING THE
RELAYS" on page 8-80.
NG→
Replace the starting circuit cut-off
relay.
OK↓
13 Check the lean angle sensor.
Refer to "CHECKING THE LEAN
ANGLE SENSOR" on page 8-84.
NG→
Replace the lean angle sensor.
OK↓
14 Check the entire ignition system’s
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-1.
NG→
Properly connect or repair the ignition
system’s wiring
OK↓
Replace the ECU.
8-4
ELECTRIC STARTING SYSTEM
EAS27160
ELECTRIC STARTING SYSTEM
EAS27170
CIRCUIT DIAGRAM
8-5
ELECTRIC STARTING SYSTEM
1. Main switch
4. Main fuse
7. Battery
9. Starter relay
10.Starter motor
11.Starting circuit cut-off relay
12.Neutral switch
13.Sidestand switch
56.Engine stop switch
57.Start switch
62.Clutch switch
77.Ignition fuse
85.Ground
86.Battery negative lead
8-6
ELECTRIC STARTING SYSTEM
EAS27180
STARTING CIRCUIT CUT-OFF SYSTEM OPERATION
If the engine stop switch is set to “ ” and the main switch is set to “ON” (both switches are closed),
the starter motor can only operate if at least one of the following conditions is met:
• The transmission is in neutral (the neutral switch is closed).
• The clutch lever is pulled to the handlebar (the clutch switch is closed) and the sidestand is up (the
sidestand switch is closed).
The starting circuit cut-off relay prevents the starter motor from operating when neither of these conditions has been met. In this instance, the starting circuit cut-off relay is open so current cannot
reach the starter motor. When at least one of the above conditions has been met the starting circuit
cut-off relay is closed and the engine can be started by pressing the starter switch.
8-7
ELECTRIC STARTING SYSTEM
a. WHEN THE TRANSMISSION IS IN NEUTRAL
b. WHEN THE SIDESTAND IS UP AND THE
CLUTCH LEVER IS PULLED TO THE
HANDLEBAR
1. Battery
2. Main fuse
3. Main switch
4. Ignition fuse
5. Engine stop switch
6. Starting circuit cut-off relay
7. Diode
8. Clutch switch
9. Sidestand switch
10.Neutral switch
11.Start switch
12.Starter relay
13.Starter motor
14.Battery negative lead
15.Ground
8-8
ELECTRIC STARTING SYSTEM
EAS27190
TROUBLESHOOTING
The starter motor fails to turn.
NOTE:
• Before troubleshooting, remove the following part(s):
1 Rider seat
2 Passenger seat
3 Fuel tank
4 Air filter case
1 Check the fuses.
(Main and ignition)
Refer to "CHECKING THE FUSES"
on page 8-77.
NG→
Replace the fuse(s).
OK↓
2 Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-77.
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
OK↓
3 Check the starter motor operation.
Refer to "CHECKING THE
STARTER MOTOR OPERATION"
on page 8-85.
NG→
Repair or replace the starter motor.
OK↓
4 Check the starter motor.
Refer to "CHECKING THE
STARTER MOTOR" on page 5-41.
NG→
Repair or replace the starter motor.
OK↓
5 Check the starting circuit cut-off
relay.
Refer to "CHECKING THE
RELAYS" on page 8-80.
NG→
Replace the starting circuit cut-off
relay.
OK↓
6 Check the starter relay.
Refer to "CHECKING THE
RELAYS" on page 8-80.
NG→
Replace the starter relay.
OK↓
7 Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the main switch.
OK↓
8-9
ELECTRIC STARTING SYSTEM
8 Check the engine stop switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the right handlebar switch.
OK↓
9 Check the neutral switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the neutral switch.
OK↓
10 Check the sidestand switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the sidestand switch.
OK↓
11 Check the clutch switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the clutch switch.
OK↓
12 Check the start switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the right handlebar switch.
OK↓
13 Check the entire starting system’s
wiring.
Refer to "ELECTRIC STARTING
SYSTEM" on page 8-5.
NG→
Properly connect or repair the starting
system’s wiring
OK↓
The starting system circuit is OK.
8-10
CHARGING SYSTEM
EAS27200
CHARGING SYSTEM
EAS27210
CIRCUIT DIAGRAM
8-11
CHARGING SYSTEM
2. AC magneto
3. Rectifier/regulator
4. Main fuse
7. Battery
85.Ground
92.Battery negative lead
8-12
CHARGING SYSTEM
EAS27230
TROUBLESHOOTING
The battery is not being charged.
NOTE:
• Before troubleshooting, remove the following part(s):
1 Rider seat
2 Fuel tank
3 Air filter case
1 Check the fuse.
(Main)
Refer to "CHECKING THE FUSES"
on page 8-77.
NG→
Replace the fuse.
OK↓
2 Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-77.
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
OK↓
3 Check the stator coil
Refer to "CHECKING THE STATOR
COIL" on page 8-85.
NG→
• Replace the stator coil assembly.
OK↓
4 Check the rectifier/regulator.
Refer to "CHECKING THE RECTIFIER/REGULATOR" on page 8-85.
NG→
Replace the rectifier/regulator.
OK↓
5 Check the entire charging system’s
wiring.
Refer to "CHARGING SYSTEM" on
page 8-11.
NG→
Properly connect or repair the charging system’s wiring.
OK↓
This circuit is OK.
8-13
CHARGING SYSTEM
8-14
LIGHTING SYSTEM
EAS27240
LIGHTING SYSTEM
EAS27250
CIRCUIT DIAGRAM
8-15
LIGHTING SYSTEM
1. Main switch
4. Main fuse
7. Battery
18.ECU (engine control unit)
49.High beam indicator light
52.Meter light
60.Dimmer switch
69.Headlight
70.Auxiliary light
72.License plate light
74.Tail/brake light
75.Headlight relay (on/off)
76.Headlight relay (dimmer)
79.Headlight fuse
85.Ground
86.Battery negative lead
8-16
LIGHTING SYSTEM
EAS27260
TROUBLESHOOTING
Any of the following fail to light: headlight, high beam indicator light, taillight, license light or meter
light.
NOTE:
• Before troubleshooting, remove the following part(s):
1 Rider seat
2 Fuel tank
3 Side cowlings
1 Check the each bulbs and bulb
sockets condition.
Refer to "CHECKING THE BULBS
AND BULB SOCKETS" on page 876.
NG→
Replace the bulb(s) and bulb
socket(s).
OK↓
2 Check the fuses.
(Main, headlight and park)
Refer to "CHECKING THE FUSES"
on page 8-77.
NG→
Replace the fuse(s).
OK↓
3 Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-77.
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
OK↓
4 Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the main switch.
OK↓
5 Check the dimmer switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
The dimmer switch is faulty. Replace
the left handlebar switch.
OK↓
6 Check the rear brake light switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the rear brake light switch.
OK↓
7 Check the headlight relay (on/off).
Refer to "CHECKING THE
RELAYS" on page 8-80.
NG→
Replace the headlight relay.
OK↓
8-17
LIGHTING SYSTEM
8 Check the headlight relay (dimmer).
Refer to "CHECKING THE
RELAYS" on page 8-80.
NG→
Replace the headlight relay.
OK↓
9 Check the entire lighting system’s
wiring.
Refer to "LIGHTING SYSTEM" on
page 8-15.
NG→
Properly connect or repair the lighting
system’s wiring.
OK↓
This circuit is OK.
8-18
SIGNALING SYSTEM
EAS27270
SIGNALING SYSTEM
EAS27280
CIRCUIT DIAGRAM
8-19
SIGNALING SYSTEM
1. Main switch
4. Main fuse
7. Battery
8. Fuel injection system fuse
11.Starting circuit cut-off relay
12.Neutral switch
14.Fuel pump
18.ECU (engine control unit)
32.Speed sensor
41.Fuel level warning light
42.Oil level warning light
43.Neutral indicator light
44.Tacho meter
45.Shift timing indicator light
46.Multi-function meter
48.Coolant temperature indicator light
50.Left turn signal indicator light
51.Right turn signal indicator light
55.Front brake light switch
58.Turn signal relay
61.Horn switch
63.Turn signal switch
64.Horn
65.Front left turn signal light
66.Front right turn signal light
67.Rear left turn signal light
68.Rear right turn signal light
73.Rear brake light switch
74.Tail/brake light
77.Ignition fuse
78.Signal fuse
85.Ground
86.Battery negative lead
8-20
SIGNALING SYSTEM
EAS27290
TROUBLESHOOTING
• Any of the following fail to light: turn signal light, brake light or an indicator light.
• The horn fails to sound.
NOTE:
• Before troubleshooting, remove the following part(s):
1 Rider seat
2 Passenger seat
3 Fuel tank
4 Side cowling
1 Check the fuses.
(Main, fuel injection system, headlight, Turn signal light, signal)
Refer to "CHECKING THE FUSES"
on page 8-77.
NG→
Replace the fuse(s).
OK↓
2 Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-77.
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
OK↓
3 Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the main switch.
OK↓
4 Check the entire signaling system’s
wiring.
Refer to "SIGNALING SYSTEM" on
page 8-19.
NG→
Properly connect or repair the signaling system’s wiring.
OK↓
This circuit is OK.
Check the signaling system
The horn fails to sound.
1 Check the horn switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the left handlebar switch.
OK↓
2 Check the horn.
Refer to "CHECKING THE HORN"
on page 8-86.
NG→
Replace the horn.
OK↓
8-21
SIGNALING SYSTEM
3 Check the entire signaling system’s
wiring.
Refer to "SIGNALING SYSTEM" on
page 8-19.
NG→
Properly connect or repair the signaling system’s wiring.
OK↓
This circuit is OK.
The tail/brake light fails to come on.
1 Check the tail/brake light bulb and
socket.
Refer to "CHECKING THE BULBS
AND BULB SOCKETS" on page 876.
NG→
Replace the tail/brake light bulb,
socket or both.
OK↓
2 Check the front brake light switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the front brake light switch.
OK↓
3 Check the rear brake light switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the rear brake light switch.
OK↓
4 Check the entire signaling system’s
wiring.
Refer to "SIGNALING SYSTEM" on
page 8-19.
NG→
Properly connect or repair the signaling system’s wiring.
OK↓
This circuit is OK.
The turn signal light, turn signal indicator light or both fail to blink.
1 Check the turn signal light bulb and
socket.
Refer to "CHECKING THE BULBS
AND BULB SOCKETS" on page 876.
NG→
Replace the turn signal indicator light
bulb, socket or both.
OK↓
2 Check the turn signal switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the left handlebar switch.
OK↓
8-22
SIGNALING SYSTEM
3 Check the turn signal relay.
Refer to "CHECKING THE
RELAYS" on page 8-80.
NG→
The turn signal relay is faulty and must
be replaced.
OK↓
4 Check the entire signaling system’s
wiring.
Refer to "SIGNALING SYSTEM" on
page 8-19.
NG→
Properly connect or repair the signaling system’s wiring.
OK↓
This circuit is OK.
The neutral indicator light fails to come on.
1 Check the neutral switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the neutral switch.
OK↓
2 Check the entire signaling system’s
wiring.
Refer to "SIGNALING SYSTEM" on
page 8-19.
NG→
Properly connect or repair the signaling system’s wiring.
OK↓
This circuit is OK.
The oil level warning light fails to come on.
1 Check the oil level switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the oil level switch.
OK↓
2 Check the entire signaling system’s
wiring.
Refer to "SIGNALING SYSTEM" on
page 8-19.
NG→
Properly connect or repair the signaling system’s wiring.
OK↓
This circuit is OK.
The fuel level warning light fails to come on.
1 Check the fuel sender.
Refer to "CHECKING THE FUEL
SENDER" on page 8-87.
NG→
Replace the fuel pump assembly.
OK↓
8-23
SIGNALING SYSTEM
2 Check the entire signaling system’s
wiring.
Refer to "SIGNALING SYSTEM" on
page 8-19.
NG→
Properly connect or repair the signaling system’s wiring.
OK↓
This circuit is OK.
The speedometer fails to operate.
1 Check the speed sensor.
Refer to "CHECKING THE SPEED
SENSOR" on page 8-87.
NG→
Replace the speed sensor.
OK↓
2 Check the entire signaling system’s
wiring.
Refer to "SIGNALING SYSTEM" on
page 8-19.
NG→
Properly connect or repair the signaling system’s wiring.
OK↓
Replace the meter assembly.
8-24
COOLING SYSTEM
EAS27300
COOLING SYSTEM
EAS27310
CIRCUIT DIAGRAM
8-25
COOLING SYSTEM
1. Main switch
4. Main fuse
7. Battery
18.ECU (engine control unit)
35.Coolant temperature sensor
77.Ignition fuse
80.Radiator fan motor relay
81.Right radiator fan motor fuse
82.Left radiator fan motor fuse
83.Right radiator fan motor
84.Left radiator fan motor
85.Ground
86.Battery negative lead
8-26
COOLING SYSTEM
EAS27320
TROUBLESHOOTING
NOTE:
• Before troubleshooting, remove the following part(s):
1 Rider seat
2 Passenger seat
3 Fuel tank
4 Side cowling
1 Check the fuses.
(Main, ignition and radiator fan
motor)
Refer to "CHECKING THE FUSES"
on page 8-77.
NG→
Replace the fuse(s).
OK↓
2 Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-77.
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
OK↓
3 Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the main switch.
OK↓
4 Check the radiator fan motor.
Refer to "CHECKING THE RADIATOR FAN MOTORS" on page 8-88.
NG→
The radiator fan motor is faulty and
must be replaced.
OK↓
5 Check the radiator fan motor relay.
Refer to "CHECKING THE
RELAYS" on page 8-80.
NG→
Replace the radiator fan motor relay.
OK↓
6 Check the coolant temperature.
Refer to "CHECKING THE COOLANT TEMPERATURE SENSOR"
on page 8-88.
NG→
Replace the coolant temperature sensor.
OK↓
7 Check the entire cooling system’s
wiring.
Refer to "COOLING SYSTEM" on
page 8-25.
NG→
Properly connect or repair the cooling
system’s wiring.
OK↓
This circuit is OK.
8-27
COOLING SYSTEM
8-28
FUEL INJECTION SYSTEM
EAS27330
FUEL INJECTION SYSTEM
EAS27340
CIRCUIT DIAGRAM
8-29
FUEL INJECTION SYSTEM
1. Main switch
4. Main fuse
5. Backup fuse
7. Battery
8. Fuel injection system fuse
11.Starting circuit cut-off relay
12.Neutral switch
13.Sidestand switch
14.Fuel pump
15.Throttle position sensor (for throttle valves)
16.Throttle position sensor (for throttle cable
pulley)
17.O2 sensor
18.ECU (engine control unit)
19.Ignition coil #1
20.Ignition coil #2
21.Ignition coil #3
22.Ignition coil #4
23.Spark plug
24.Injector #1
25.Injector #2
26.Injector #3
27.Injector #4
31.EXUP servo motor
32.Speed sensor
33.Intake air temperature sensor
34.Crankshaft position sensor
35.Coolant temperature sensor
36.Intake air pressure sensor
37.Atmospheric pressure sensor
38.Cylinder identification sensor
39.Lean angle sensor
46.Multi-function meter
56.Engine stop switch
77.Ignition fuse
85.Ground
86.Battery negative lead
8-30
FUEL INJECTION SYSTEM
EAS27350
ECU SELF-DIAGNOSTIC FUNCTION
The ECU is equipped with a self-diagnostic function in order to ensure that the fuel injection system
is operating normally. If this function detects a malfunction in the system, it immediately operates the
engine under substitute characteristics and illuminates the engine trouble warning light to alert the
rider that a malfunction has occurred in the system. Once a malfunction has been detected, a fault
code is stored in the memory of the ECU.
• To inform the rider that the fuel injection system is not functioning, the engine trouble warning light
flashes when the start switch is being pushed to start the engine.
• If a malfunction is detected in the system by the self-diagnostic function, the ECU provides an
appropriate substitute characteristic operation, and alerts the rider of the detected malfunction by
illuminating the engine trouble warning light.
• After the engine has been stopped, the lowest fault code number appears on the odometer/trip
meter/fuel reservoir trip meter/stop watch LCD. Once a fault code has been displayed, it remains
stored in the memory of the ECU until it is deleted.
Engine trouble warning light indication and FI system operation
Warning light indication
ECU operation
FI operation
Vehicle operation
Flashing*
Warning provided
when unable to start
engine
Operation stopped
Cannot be operated
Malfunction detected
Operated with substitute characteristics in
accordance with the
description of the malfunction
Can or cannot be operated depending on the
fault code
Remains on
* The warning light flashes when any one of the conditions listed below is present and the start
switch is pushed:
11:
Cylinder identification sensor
30:
Lean angle sensor
(latch up detected)
12:
Crankshaft position sensor
41:
Lean angle sensor
(open or short-circuit)
19:
Sidestand switch
(open circuit in the wire to the ECU)
50:
ECU internal malfunction
(faulty ECU memory)
Checking engine trouble warning light
The engine trouble warning light comes on for 1.4 seconds after the main switch has been turned to
“ON” and it comes on while the start switch is being pushed. If the warning light does not come on
under these conditions, the warning light (LED) may be defective.
a
b
c
d
8-31
c
FUEL INJECTION SYSTEM
a.
b.
c.
d.
Main switch “OFF”
Main switch “ON”
Engine trouble warning light off
Engine trouble warning light on for 1.4 seconds
EAS27362
FAIL-SAFE ACTIONS (SUBSTITUTE CHARACTERISTICS OPERATION CONTROL)
If the ECU detects an abnormal signal from a sensor while the vehicle is being driven, the ECU illuminates the engine trouble warning light and provides the engine with alternate operating instructions that are appropriate for the type of malfunction.
When an abnormal signal is received from a sensor, the ECU processes the specified values that
are programmed for each sensor in order to provide the engine with alternate operating instructions
that enable the engine to continue to operate or stop operating, depending on the conditions.
Self-Diagnostic Function table
Fault
code No.
Item
11
Cylinder identification
sensor
12
Crankshaft position
sensor
13
14
15
17
18
19
Intake air pressure
sensor
(open or short circuit)
Intake air pressure
sensor
(pipe system)
Symptom
• No normal signals are received
from the cylinder identification
sensor.
• Malfunction of electric starting
system.
No normal signals are received
from the crankshaft position sensor.
Able /
unable to
start
Unable
Able
Unable
Unable
Intake air pressure sensor-open or
Able
short circuit detected.
Intake air pressure sensor-pipe
system malfunction (clogged or
Able
detached hose).
Throttle position sensor (for throttle
Throttle position sen- valves):
sor (for throttle valves) open or short circuit detected.
Able/Unable
(open or short circuit/ Throttle position sensor (for throttle
loose connection)
valves) coupler connection is
loose.
EXUP servo motor cirEXUP servo motor circuit: open or
cuit
Able
short circuit detected.
(open or short circuit)
EXUP servo motor
EXUP servo motor is stuck.
Able
(stuck)
Sidestand switch
Open circuit is detected in the input
(open circuit wire har- line from the sidestand switch to
Unable
ness to ECU)
the ECU.
8-32
Able /
unable to
drive
Able
Able
Able/Unable
Able
Able
Unable
FUEL INJECTION SYSTEM
Fault
code No.
Item
20
Intake air pressure
sensor
Atmospheric pressure
sensor
21
22
23
24
30
Symptom
Intake air pressure sensor-open or
short circuit detected.
Defective values are detected due
to the internal malfunction of the
intake air pressure sensor or the
Atmospheric pressure sensor.
Coolant temperature Coolant temperature sensor-open
sensor
or short circuit detected.
Intake air temperature Intake air temperature sensorsensor
open or short circuit detected.
Atmospheric pressure Atmospheric pressure sensorsensor
open or short circuit detected.
No normal signal is received from
O2 sensor
the O2 sensor.
Lean angle sensor
Latch up detected.
No normal signal is received from
the lean angle sensor.
Able /
unable to
start
Able
Able
Able
Able
Able
Able
Able
Able
Able
Able
Unable
Unable
Able
(depending
on the number of faulty
cylinders)
Able
(depending
on the number of faulty
cylinders)
Able
(depending
on the number of faulty
cylinders)
Able
(depending
on the number of faulty
cylinders)
Able
(depending
on the number of faulty
cylinders)
Able
(depending
on the number of faulty
cylinders)
Able
(depending
on the number of faulty
cylinders)
Able
(depending
on the number of faulty
cylinders)
Able
(depending
on the number of faulty
cylinders)
Able
(depending
on the number of faulty
cylinders)
33
Ignition coil (#1)
(faulty ignition)
Malfunction detected in the primary wire of the ignition coil (#1).
34
Ignition coil (#2)
(faulty ignition)
Malfunction detected in the primary wire of the ignition coil (#2).
35
Ignition coil (#3)
(faulty ignition)
Malfunction detected in the primary wire of the ignition coil (#3).
36
Ignition coil (#4)
(faulty ignition)
Malfunction detected in the primary wire of the ignition coil (#4).
39
Injector
(open circuit)
Injector:
open circuit detected.
41
Lean angle sensor
(open or short circuit)
42
Speed sensor
Neutral switch
Lean angle sensor-open or short
Unable
circuit detected.
No normal signals are received
from the speed sensor.
Able
Open or short circuit is detected in
the neutral switch.
8-33
Able /
unable to
drive
Unable
Able
FUEL INJECTION SYSTEM
Fault
code No.
43
44
46
50
59
60
Item
Fuel system voltage
(monitor voltage)
Symptom
The ECU is unable to monitor the
battery voltage
(an open circuit in the line to the
ECU).
Error is detected while reading or
writing on EEPROM (CO adjustment value).
Error in writing the
amount of CO adjustment on EEPROM
Vehicle system power
Power supply to the fuel injection
supply
system is not normal.
(Monitoring voltage)
ECU memory is faulty. (When this
ECU internal malfunc- malfunction is detected in the ECU,
tion
the fault code number might not
appear on the meter.)
Throttle position sensor (for throttle
Throttle position sencable pulley):
sor (for throttle cable
open or short circuit detected.
pulley)
Throttle position sensor (for throttle
(open or short circuit/
cable pulley) coupler connection is
loose connection)
loose.
Throttle servo motor:
open or short circuit detected.
Throttle servo motor
Motor is defective or ECU internal
malfunction.
Able /
unable to
start
Able /
unable to
drive
Able
Able
Able
Able
Able
Able
Able/Unable Able/Unable
Able/Unable Able/Unable
Able/Unable Able/Unable
Communication error with the meter
Fault
code No.
Er-1
Er-2
Er-3
Er-4
Item
ECU internal malfunction
(output signal error)
ECU internal malfunction
(output signal error)
ECU internal malfunction
(output signal error)
ECU internal malfunction
(input signal error)
Symptom
Able /
unable to
start
Able /
unable to
drive
No signals are received from the
ECU.
Unable
Unable
No signals are received from the
ECU within the specified duration.
Unable
Unable
Data from the ECU cannot be
received correctly.
Unable
Unable
Non-registered data has been
received from the meter.
Unable
Unable
8-34
FUEL INJECTION SYSTEM
The engine operation is not normal but the
engine trouble warning light does not come
on.
1. Check the operation of following sensors
and actuators in the Diagnostic mode.
Refer to “Sensor operation table” and
“Actuator operation table”.
EAS27400
TROUBLESHOOTING METHOD
The engine operation is not normal and the
engine trouble warning light comes on.
1. Check:
• Fault code number
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Check the fault code number displayed on
the meter.
b. Identify the faulty system with the fault
code. Refer to “Self-Diagnostic Function
table”.
c. Identify the probable cause of malfunction.
Refer to “Fault code table”.
01: Throttle position sensor (for throttle
valves) signal 1 (throttle angle)
13: Throttle position sensor (for throttle
valves) signal 2 (throttle angle)
14: Throttle position sensor (for throttle cable
pulley) signal 1 (throttle angle)
15: Throttle position sensor (for throttle cable
pulley) signal 2 (throttle angle)
30: Ignition coil #1
31: Ignition coil #2
32: Ignition coil #3
33: Ignition coil #4
36: Injector #1
37: Injector #2
38: Injector #3
39: Injector #4
48: AI system solenoid
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Checking and repair the probable cause of
malfunction.
Fault code No.
Check and repair.
Refer to "TROUBLESHOOTING
DETAILS" on page 844.
Monitor the operation
of the sensors and
actuators in the diagnostic mode. Refer to
“Sensor operation
table” and “Actuator
operation table”.
No fault code No.
Check and repair.
Refer to "TROUBLESHOOTING
DETAILS" on page 844.
If a malfunction is detected in the sensors
or actuators, repair or replace all faulty
parts.
If no malfunction is detected in the sensors
and actuators, check and repair inner parts
of the engine.
3. Perform fuel injection table reinstatement
action.
Refer to “Reinstatement method” of table in
“TROUBLESHOOTING DETAILS”.
4. Turn the main switch to “OFF” and back to
“ON”, then check the fault code number is
displayed.
NOTE:
If fault code are displayed, repeat steps (1) to
(4) until no fault code number is displayed.
5. The Malfunction history is stored even if the
main switch is turned OFF. The malfunction
history must be erased in the diagnostic
mode. Refer to “Sensor operation table
(Diagnostic code No.62)”.
8-35
FUEL INJECTION SYSTEM
EAS27421
DIAGNOSTIC MODE
Setting the diagnostic mode
1. Turn the main switch to “OFF” and set the engine stop switch to “ON”.
2. Disconnect the wire harness coupler from the fuel pump.
3. Simultaneously press and hold the “SELECT” and “RESET” buttons, turn the main switch to
“ON”, and continue to press the buttons for 8 seconds or more.
NOTE:
• All displays on the meter disappear except the odometer/trip meter/fuel reservoir trip meter/stop
watch displays.
• “dIAG” appears on the odometer/trip meter/fuel reservoir trip meter/stop watch LCD.
4. Press the “SELECT” button to select the diagnostic mode “dIAG”.
5. After selecting “dIAG”, simultaneously press the “SELECT” and “RESET” buttons for 2 seconds
or more to activate the diagnostic mode. The diagnostic code number “d01” appears on the
odometer/trip meter/fuel reservoir trip meter/stop watch LCD.
6. Set the engine stop switch to “OFF”.
7. Select the diagnostic code number corresponding to the fault code number by pressing the
“SELECT” and “RESET” buttons.
NOTE:
The diagnostic code number appears on the odometer/trip meter/fuel reservoir trip meter/stop watch
LCD (01–70).
• To decrease the selected diagnostic code number, press the “RESET” button. Press the “RESET”
button for 1 second or longer to automatically decrease the diagnostic code numbers.
• To increase the selected diagnostic code number, press the “SELECT” button. Press the
“SELECT” button for 1 second or longer to automatically increase the diagnostic code numbers.
8. Verify the operation of the sensor or actuator.
• Sensor operation
The data representing the operating conditions of the sensor appears on the odometer/trip
meter/fuel reservoir trip meter/stop watch LCD.
• Actuator operation
Set the engine stop switch to “ ” to operate the actuator.
8-36
FUEL INJECTION SYSTEM
NOTE:
If the engine stop switch is set to “
”, set it to “
”, and then set it to “
” again.
9. Turn the main switch to “OFF” to cancel the diagnostic mode.
Fault code table
Fault
code
No.
11
12
13
14
15
17
18
19
Symptom
No normal signals are
received from the cylinder
identification sensor when
the engine is started or
while the vehicle is being
driven.
No normal signals are
received from the crankshaft position sensor.
Intake air pressure sensor:
open or short circuit
detected.
Intake air pressure sensor:
hose system malfunction
(clogged or detached
hose).
Throttle position sensor (for
throttle valves): open or
short circuit detected.
Throttle position sensor (for
throttle valves) coupler connection is loose.
EXUP servo motor circuit:
open or short circuit
detected or loose connection.
Probable cause of malfunction
Diagnostic
code No.
•
•
•
•
•
Open or short circuit in sub-wire-harness 1.
Open or short circuit in wire harness.
Defective cylinder identification sensor.
—
Malfunction in ECU.
Improperly installed sensor.
•
•
•
•
•
•
•
•
Open or short circuit in wire harness.
Defective crankshaft position sensor.
Malfunction in pickup rotor.
Malfunction in ECU.
Improperly installed sensor.
Open or short circuit in wire harness.
Defective intake air pressure sensor.
Malfunction in ECU.
• Intake air pressure sensor hose is
detached, clogged, kinked, or pinched.
• Malfunction in ECU.
—
03
03
• Open or short circuit in wire harness.
• Defective throttle position sensor (for throttle valves).
01
• Malfunction in ECU.
13
• Improperly installed throttle position sensor
(for throttle valves).
• Open or short circuit in wire harness.
• Defective EXUP servo motor (potentiometer 53
circuit).
•
EXUP servo motor is stuck. •
•
Open circuit is detected in •
the input lead from the side- •
stand switch to the ECU.
•
Open or short circuit in wire harness.
Stuck EXUP servo motor (mechanism).
53
Stuck EXUP servo motor (motor).
Open circuit in wire harness (ECU Coupler).
Malfunction in ECU.
20
Relay unit (diode)
8-37
FUEL INJECTION SYSTEM
Fault
code
No.
20
21
22
23
24
30
33
34
35
36
39
Symptom
Probable cause of malfunction
• Atmospheric pressure sensor hose is
clogged.
When the main switch is
• Intake air pressure sensor hose is clogged,
turned to “ON”, the atmokinked, or pinched.
spheric pressure sensor
• Malfunction of the atmospheric pressure
voltage and intake air pressensor in the intermediate electrical potensure sensor voltage differ
tial.
greatly.
• Malfunction of the intake air pressure sensor in the intermediate electrical potential.
• Malfunction in ECU.
• Open or short circuit in wire harness.
Coolant temperature sen• Defective coolant temperature sensor.
sor: open or short circuit
• Malfunction in ECU.
detected.
• Improperly installed coolant temperature
sensor.
• Open or short circuit in wire harness.
Air temperature sensor:
• Defective air temperature sensor.
open or short circuit
• Malfunction in ECU.
detected.
• Improperly installed air temperature sensor.
• Open or short circuit in wire harness.
Atmospheric pressure sen- • Defective atmospheric pressure sensor.
sor: open or short circuit
• Improperly installed atmospheric pressure
detected.
sensor.
• Malfunction in ECU.
• Open or short circuit in wire harness.
No normal signal is
• Defective O2 sensor.
received from the O2 sen• Malfunction in ECU.
sor.
• Improperly installed O2 sensor.
Latch up detected.
No normal signal is
received from the lean
angle sensor.
Open circuit detected in the
primary lead of the cylinder#1 ignition coil.
Open circuit detected in the
primary lead of the cylinder#2 ignition coil.
Open circuit detected in the
primary lead of the cylinder#3 ignition coil.
Open circuit detected in the
primary lead of the cylinder#4 ignition coil.
Open circuit detected in a
injector.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
The vehicle has overturned.
Defective lean angle sensor.
Malfunction in ECU.
Improperly installed lean angle sensor.
Open circuit in wire harness.
Malfunction in ignition coil.
Malfunction in ECU.
Open circuit in wire harness.
Malfunction in ignition coil.
Malfunction in ECU.
Open circuit in wire harness.
Malfunction in ignition coil.
Malfunction in ECU.
Open circuit in wire harness.
Malfunction in ignition coil.
Malfunction in ECU.
Open or short circuit in wire harness.
Defective primary injector.
Malfunction in ECU.
Improperly installed primary injector.
8-38
Diagnostic
code No.
03
02
06
05
02
—
08
30
31
32
33
36
37
38
39
FUEL INJECTION SYSTEM
Fault
code
No.
41
42
43
44
46
50
59
60
Er-1
Er-2
Symptom
Lean angle sensor:
open or short circuit
detected.
No normal signals are
received from the speed
sensor.
Neutral switch:
open or short circuit
detected.
Power supply to the injectors and the fuel pump is
not normal.
An error is detected while
reading or writing on
EEPROM (CO adjustment
value).
Probable cause of malfunction
•
•
•
•
•
•
•
•
•
Open or short circuit in wire harness.
Defective lean angle sensor.
Malfunction in ECU.
Open circuit in wire harness.
Malfunction in speed sensor.
Malfunction in ECU.
Open circuit in wire harness.
Malfunction in neutral switch.
Malfunction in ECU.
• Open or short circuit in wire harness.
• Malfunction in ECU.
• Malfunction in ECU.
(The CO adjustment value is not properly
written on or read from the internal memory).
Malfunction in the charging system.
Power supply is not normal. Refer to "CHARGING SYSTEM" on page 811.
Faulty ECU memory.
• Malfunction in ECU.
(When this malfunction is
(The program and data are not properly
detected in the ECU, the
written on or read from the internal memfault code number might not
ory.)
appear on the meter.)
Throttle position sensor (for
throttle cable pulley):
• Open or short circuit in wire harness.
open or short circuit
• Defective throttle position sensor.
detected.
• Improperly installed throttle position sensor.
Throttle position sensor (for
• Malfunction in ECU.
throttle cable pulley) coupler connection is loose.
Throttle servo motor:
• Open or short circuit in wire harness.
open or short circuit
• Defective throttle servo motor (potentiomedetected.
ter circuit).
Defective throttle servo
• Stuck throttle servo motor (mechanism).
motor.
• Stuck throttle servo motor (motor).
Malfunction in ECU (servo
• Malfunction in ECU.
motor driving system).
• Open or short circuit in wire harness.
• Malfunction in meter.
No signals are received
• Malfunction in ECU.
from the ECU.
• Defective wire connection of the ECU coupler.
No signals are received
• Improper connection in wire harness.
from the ECU within the
• Malfunction in meter.
specified duration.
• Malfunction in ECU.
8-39
Diagnostic
code No.
08
07
21
09
60
—
—
14
15
01
—
—
FUEL INJECTION SYSTEM
Fault
code
No.
Symptom
Er-3
Data from the ECU cannot
be received correctly.
Er-4
Non-registered data has
been received from the
meter.
Probable cause of malfunction
•
•
•
•
•
•
Improper connection in wire harness.
Malfunction in meter.
Malfunction in ECU.
Improper connection in wire harness.
Malfunction in meter.
Malfunction in ECU.
Diagnostic
code No.
—
—
Sensor operation table
Diagnostic
Item
Meter display
code
No.
01
Throttle position sensor (for
throttle valves) signal 1
• Fully closed position
12–21
• Fully opened position
02
Atmospheric pressure
03
Intake air pressure
05
Intake air temperature
06
Coolant temperature
07
Vehicle speed pulse
08
Lean angle sensor
• Upright
• Overturned
Checking method
Check with throttle valves
fully closed.
97–106
Check with throttle valves
fully opened.
Displays the atmospheric
Compare the actually meapressure.
sured atmospheric pressure with the meter display
value.
Displays intake air pressure. Compare the actually measured atmospheric pressure with the meter display
value without cranking the
engine.
Displays the intake air temCompare the actually meaperature.
sured air temperature with
the meter display value.
Displays the coolant tempera- Compare the actually meature.
sured coolant temperature
with the meter display
value.
0–999
Check that the number
increases when the rear
wheel is rotated. The number is cumulative and does
not reset each time the
wheel is stopped.
Remove the lean angle
sensor
and incline it more
0.4–1.4
than
65
degrees.
3.7–4.4
8-40
FUEL INJECTION SYSTEM
Diagnostic
Item
code
No.
09
Fuel system voltage
(battery voltage)
13
21
60
97–107
Throttle position sensor (for
throttle cable pulley) signal
2
• Fully closed position
10–24
• Fully opened position
20
94–108
Throttle position sensor (for
throttle cable pulley) signal
1
• Fully closed position
12–22
• Fully opened position
15
Approximately 12.0
Throttle position sensor (for
throttle valves) signal 2
• Fully closed position
9–23
• Fully opened position
14
Meter display
Sidestand switch
• Stand retracted
• Stand extended
Neutral switch
• Neutral
• In gear
EEPROM fault cylinder No.
• No history
• History exists
95–109
ON
OFF
Checking method
Set the engine stop switch
to “ ”, and then compare
with the actually measured
battery voltage. (If the battery voltage is lower,
recharge the battery.)
Check with throttle valve
fully closed.
Check with throttle valve
fully opened.
Check with throttle grip fully
closed.
Check with throttle grip fully
opened.
Check with throttle grip fully
closed.
Check with throttle grip fully
opened.
Set ON/OFF the sidestand
switch (with the transmission in gear).
Shift the transmission.
ON
OFF
—
00
01-04 (fault cylinder No.)
• (If more than one cylinder is
defective, the display
changes every two seconds
to show all the detected cylinder numbers. When all
cylinder numbers are
shown, the display repeats.)
8-41
FUEL INJECTION SYSTEM
Diagnostic
Item
code
No.
61
Malfunction history code
• No history
• History exists
62
63
70
Malfunction history code
erasure
• No history
• History exists
Malfunction code reinstate
(for fault code No. 24 and
40 only)
• No malfunction code
• Malfunction code exists
Control number
Meter display
Checking method
—
00
11-60 (Fault detection code)
• (If more than one code
number is detected, the display changes every two
seconds to show all the
detected code numbers.
When all code numbers are
shown, the display repeats.)
00
• Displays the total number of
malfunctions, including the
current malfunction, that
have occurred since the history was last erased.(For
example, if there have been
three malfunctions, “03” is
displayed.)
—
To erase the history, set the
engine stop switch from
“ ” to “ ”.
00
Fault codes 24, 40
• (If more than one code
number is detected, the display changes every two
seconds to show all the
detected code numbers.
When all code numbers are
shown, the display repeats.)
00
—
To erase the history, set the
engine stop switch from
“ ” to “ ”.
Actuation
Checking method
—
Actuator operation table
Diagnostic
code
No.
30
Item
Cylinder-#1 ignition coil
Actuates the cylinder-#1 ignition coil five times at one-sec- Check the spark five times.
ond intervals.
• Connect an ignition
Illuminates the engine trouchecker.
ble warning light.
8-42
FUEL INJECTION SYSTEM
Diagnostic
code
No.
31
Item
Cylinder-#2 ignition coil
32
Cylinder-#3 ignition coil
33
Cylinder-#4 ignition coil
34
Intake funnel
36
Injector #1
37
Injector #2
38
Injector #3
39
Injector #4
48
Air induction system solenoid
Actuation
Actuates the cylinder-#2 ignition coil five times at one-second intervals.
Illuminates the engine trouble warning light.
Actuates the cylinder-#3 ignition coil five times at one-second intervals.
Illuminates the engine trouble warning light.
Actuates the cylinder-#4 ignition coil five times at one-second intervals.
Illuminates the engine trouble warning light.
Actuates the intake funnel (up
position down position for
each 3 seconds).
Illuminates the engine trouble warning light.
Actuates the injector #1 five
times at one-second intervals.
Illuminates the engine trouble warning light.
Actuates the injector #2 five
times at one-second intervals.
Illuminates the engine trouble warning light.
Actuates the injector #3 five
times at one-second intervals.
Illuminates the engine trouble warning light.
Actuates the injector #4 five
times at one-second intervals.
Illuminates the engine trouble warning light.
Actuates the air induction
system solenoid five times at
one-second intervals.
Illuminates the engine trouble warning light.
8-43
Checking method
Check the spark five times.
• Connect an ignition
checker.
Check the spark five times.
• Connect an ignition
checker.
Check the spark five times.
• Connect an ignition
checker.
Check the operating sound
of the intake funnel.
Check the operating sound
of the primary injector #1
five times.
Check the operating sound
of the primary injector #2
five times.
Check the operating sound
of the primary injector #3
five times.
Check the operating sound
of the primary injector #4
five times.
Check the operating sound
of the air induction system
solenoid five times.
FUEL INJECTION SYSTEM
Diagnostic
code
No.
50
51
Item
Fuel injection system relay
Radiator fan motor relay
52
Headlight relay
53
EXUP servo motor
Actuation
Actuates the fuel injection
system relay five times at
one-second intervals.
Illuminates the engine trouble warning light.
(The engine trouble warning
light is OFF when the relay is
ON, and the engine trouble
warning light is ON when the
relay is OFF).
Actuates the radiator fan
motor relay five times at one
second intervals. (ON 2 seconds, OFF 3 seconds)
Illuminates the engine trouble warning light.
Actuates the headlight relay
five times at one-second
intervals. (ON 2 seconds,
OFF 3 seconds)
Illuminates the engine trouble warning light.
Actuates the servo motor
(turns to open side and to
closed side).
Illuminates the engine trouble warning light.
Checking method
Check the operating sound
of the fuel injection system
relay five times.
Check the operating sound
of the radiator fan motor
relay five times.
Check the operating sound
of the headlight relay five
times.
Check the operating sound.
EAS27461
TROUBLESHOOTING DETAILS
This section describes the measures per fault code number displayed on the meter. Check and service the items or components that are the probable cause of the malfunction following the order
given.
After the check and service of the malfunctioning part has been completed, reset the meter display
according to the reinstatement method.
Fault code No.:
Code number displayed on the meter when the engine failed to work normally. Refer to “Self-Diagnostic Function table”.
Diagnostic code No.:
Diagnostic code number to be used when the diagnostic mode is operated. Refer to "DIAGNOSTIC
MODE" on page 8-36.
8-44
FUEL INJECTION SYSTEM
No normal signals are received from the cylinder identifiFault code No. 11 Symptom cation sensor when the engine is started or while the
vehicle is being driven.
Diagnostic code No. —
—
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Installed condition of cylinder identifi- Check for looseness or pinching. Cranking the
cation sensor.
engine.
2
Connections
• Check the couplers for any pins
• Cylinder identification sensor couthat may be pulled out.
pler
• Check the locking condition of
• Main wire harness ECU coupler
the couplers.
• If there is a malfunction, repair it
and connect the coupler
securely.
3
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between the cylinder identification sensor coupler and ECU
coupler.
(Blue–Blue)
(White/Black–White/Black)
(Black/Blue–Black/Blue)
4
Defective cylinder identification sen• Replace if defective.
sor.
Refer to "CHECKING THE
CYLINDER IDENTIFICATION
SENSOR" on page 8-91.
8-45
FUEL INJECTION SYSTEM
No normal signals are received from the crankshaft position sensor.
Diagnostic code No. —
—
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Installed condition of crankshaft posi- Check for looseness or pinching. Cranking the
tion sensor
engine.
2
Connections
• Check the coupler for any pins
• Crankshaft position sensor coupler
that may have pulled out.
• Main wire harness ECU coupler
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler
securely.
3
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between the crankshaft position
sensor coupler and ECU coupler.
(Gray–Gray)
(Black/Blue–Black/Blue)
4
Defective crankshaft position sensor. • Replace if defective.
Refer to "CHECKING THE
CRANKSHAFT POSITION
SENSOR" on page 8-84.
Fault code No.
12
Symptom
Fault code No. 13 Symptom Intake air pressure sensor: open or short circuit detected.
Diagnostic code No. 03
Intake air pressure sensor
Reinstatement
Orde Item/components and probable
Check or maintenance job
method
r
cause
1
Connections
• Check the coupler for any pins Reinstated
• Intake air pressure sensor coupler
that may be pulled out.
automatically if
• Main wire harness ECU coupler
• Check the locking condition of a normal signal
the coupler.
is received.
• If there is a malfunction, repair it
and connect the coupler
securely.
2
Open or short circuit in wire harness • Repair or replace if there is an
and/or sub-wire-harness 2.
open or short circuit.
• Between intake air pressure
sensor coupler and ECU coupler
(Black/Blue–Black/Blue)
(Pink/White–Pink/White)
(Blue–Blue)
3
Defective intake air pressure sensor. • Execute the diagnostic mode.
(Code No.03)
• Replace if defective.
Refer to "CHECKING THE
INTAKE AIR PRESSURE SENSOR" on page 8-91.
8-46
FUEL INJECTION SYSTEM
Intake air pressure sensor: hose system malfunction
(clogged or detached hose).
Diagnostic code No. 03
Intake air pressure sensor
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Intake air pressure sensor hose
• Check the intake air pressure
Cranking the
sensor hose condition.
engine.
• Repair or replace the sensor
hose.
2
Defective intake air pressure sensor. • Execute the diagnostic mode.
(Code No. 03)
• Replace if defective.
Refer to "CHECKING THE
INTAKE AIR PRESSURE SENSOR" on page 8-91.
Fault code No.
14
Symptom
Throttle position sensor (for throttle valves): open or
short circuit detected.
01
Throttle position sensor (for throttle valves) signal 1
Diagnostic code No.
13
Throttle position sensor (for throttle valves) signal 2
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Installed condition of throttle position • Check for looseness or pinchTurning the
sensor (for throttle valves).
ing.
main switch to
• Check that the sensor is
“ON”.
installed in the specified position.
2
Connections
• Check the coupler for any pins
• Throttle position sensor (for throttle
that may be pulled out.
valves) coupler
• Check the locking condition of
• Main wire harness ECU coupler
the coupler.
• If there is a malfunction, repair it
and connect the coupler
securely.
3
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between throttle position sensor
coupler (for throttle valves) coupler and ECU coupler.
(Black/Blue–Black/Blue)
(White–White)
(Black–Black)
(Blue–Blue)
4
Defective throttle position sensor (for • Execute the diagnostic mode.
throttle valves).
(Code Nos. 01, 13)
• Replace if defective.
Refer to "CHECKING THE
THROTTLE POSITION SENSOR (FOR THROTTLE
VALVES)" on page 8-89.
Fault code No.
15
Symptom
8-47
FUEL INJECTION SYSTEM
Fault code No. 17 Symptom EXUP servo motor circuit: open or short circuit detected.
Diagnostic code No. 53
EXUP servo motor
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the coupler for any pins Reinstated
• EXUP servo motor coupler
that may have pulled out.
automatically if
• Main wire harness ECU coupler
• Check the locking condition of a normal signal
the coupler.
is received.
• If there is a malfunction, repair it
and connect the coupler
securely.
2
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between EXUP servo motor
coupler and ECU coupler.
(Blue–Blue)
(White/Red–White/Red)
(Black/Blue–Black/Blue)
3
Defective EXUP servo motor (potenti- • Execute the diagnostic mode.
ometer circuit).
(Code No.53)
• Replace if defective.
Fault code No. 18 Symptom EXUP servo motor is stuck.
Diagnostic code No. 53
EXUP servo motor
Orde Item/components and probable
Check or maintenance job
r
cause
1
Connections
• Check the coupler for any pins
• EXUP servo motor coupler
that may be pulled out.
• Main wire harness ECU coupler
• Check the locking condition of
the couplers.
• If there is a malfunction, repair it
and connect the coupler
securely.
2
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between EXUP servo motor
coupler and ECU coupler.
(Black/Green–Black/Green)
(Black/Red–Black/Red)
3
Defective EXUP servo motor
• Execute the diagnostic mode.
(Code No.53)
• Replace if defective.
4
Defective EXUP valve, pulley, and
Replace if defective.
cables
8-48
Reinstatement
method
Turning the
main switch to
“ON”.
It takes 3 seconds at the
maximum
before the original state
returns.
FUEL INJECTION SYSTEM
Open circuit is detected in the input line from the sidestand switch to the ECU.
Diagnostic code No. 20
Sidestand switch
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Execute the diagnostic mode.
If the transmission is in gear,
• Main wire harness ECU coupler
(Code No.20)
• Check the coupler for any pins retracting the
that may be pulled out.
sidestand.
• Check the locking condition of If the transmisthe coupler.
sion is in neu• If there is a malfunction, repair it tral,
and connect the coupler
reconnecting
securely.
the wiring.
2
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between ECU coupler and relay
unit coupler.
(Blue/Yellow–Blue/Yellow)
• Between relay unit coupler and
sidestand switch coupler.
(Blue/Black–Blue/Black)
• Between sidestand switch coupler and engine ground.
(Black–Black)
3
Defective sidestand switch.
• Replace if defective.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
Fault code No.
19
Symptom
When the main switch is turned to "ON", the atmospheric
Symptom pressure sensor voltage and intake air pressure sensor
voltage differ greatly.
03
Intake air pressure sensor
Diagnostic code No.
02
Atmospheric pressure sensor
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Defective intake air pressure sensor or • Execute the diagnostic mode.
Turning the
atmospheric pressure sensor.
(Code Nos. 03, 02)
main switch to
Replace if defective.
“ON”.
• Refer to "CHECKING THE
INTAKE AIR PRESSURE SENSOR" on page 8-91 or
"CHECKING THE ATMOSPHERIC PRESSURE SENSOR" on page 8-90.
Fault code No.
20
8-49
FUEL INJECTION SYSTEM
Coolant temperature sensor: open or short circuit
detected.
Diagnostic code No. 06
Coolant temperature sensor
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the coupler for any pins Reinstated
• Coolant temperature sensor coupler
that may have pulled out.
automatically if
• Main wire harness ECU coupler
• Check the locking condition of a normal signal
the couplers.
is received.
• If there is a malfunction, repair it
and connect the coupler
securely.
2
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between coolant temperature
sensor coupler and ECU coupler.
(Green/White–Green/White)
(Black/Blue–Black/Blue)
3
Defective coolant temperature sensor. • Execute the diagnostic mode.
(Code No.06)
• Replace if defective.
Refer to "CHECKING THE
COOLANT TEMPERATURE
SENSOR" on page 8-88.
Fault code No.
21
Symptom
Fault code No. 22 Symptom Air temperature sensor: open or short circuit detected.
Diagnostic code No. 05
Air temperature sensor
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the coupler for any pins Reinstated
• Air temperature sensor coupler
that may have pulled out.
automatically if
• Main wire harness ECU coupler
• Check the locking condition of a normal signal
the coupler.
is received.
• If there is a malfunction, repair it
and connect the coupler
securely.
2
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between air temperature sensor
coupler and ECU coupler.
(Brown/White–Brown/White)
(Black/Blue–Black/Blue)
3
Defective air temperature sensor.
• Execute the diagnostic mode.
(Code No.05)
• Replace if defective.
Refer to "CHECKING THE
INTAKE AIR TEMPERATURE
SENSOR" on page 8-91.
8-50
FUEL INJECTION SYSTEM
Atmospheric pressure sensor: open or short circuit
detected.
Diagnostic code No. 02
Atmospheric pressure sensor
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the coupler for any pins Reinstated
• Atmospheric pressure sensor couthat may have pulled out.
automatically if
pler
• Check the locking condition of a normal signal
• Main wire harness ECU coupler
the coupler.
is received.
• If there is a malfunction, repair it
and connect the coupler
securely.
2
Open or short circuit in wire harness • Repair or replace if there is an
and/or sub wire harness 2.
open or short circuit.
• Between atmospheric pressure
sensor coupler and ECU coupler.
(Black/Blue–Black/Blue)
(Pink–Pink)
(Blue–Blue)
3
Defective atmospheric pressure sen- • Execute the diagnostic mode.
sor.
(Code No.02)
• Replace if defective.
Refer to "CHECKING THE
ATMOSPHERIC PRESSURE
SENSOR" on page 8-90.
Fault code No.
23
Symptom
Fault code No. 24 Symptom No normal signal is received from the O2 sensor.
Diagnostic code No. —
—
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Installed state of O2 sensor.
Check for looseness or pinching. Execute the
• Check the couplers for any pins diagnostic
2
Connections
mode (Code
that may be pulled out.
• O2 sensor coupler
• Check the locking condition of No. 63). (Set
• Main wire harness ECU coupler
the engine stop
the couplers.
• If there is a malfunction, repair it switch to “ ”.)
3
Open or short circuit in wire harness.
•
•
4
Check fuel pressure.
•
5
Defective O2 sensor.
•
and connect the coupler
securely.
Repair or replace if there is an
open or short circuit.
Between O2 sensor coupler and
ECU coupler.
(Gray/Green–Gray/Green)
(Black/Blue–Black/Blue)
Refer to "THROTTLE BODIES"
on page 7-4.
Replace if defective.
8-51
FUEL INJECTION SYSTEM
Latch up detected.
No normal signal is received from the lean angle sensor.
Diagnostic code No. 08
Lean angle sensor
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
The vehicle has overturned.
Raise the vehicle upright.
Turning the
main
switch to
2
Installed state of the lean angle sen- Check the installed direction and
“ON” (however,
sor.
condition of the sensor.
the engine can3
Defective lean angle sensor.
• Execute the diagnostic mode.
not be restarted
(Code No.08)
unless the main
• Replace if defective.
switch is first
Refer to "CHECKING THE
turned to
LEAN ANGLE SENSOR" on
“OFF”).
page 8-84.
Fault code No.
30
Symptom
Open circuit detected in the primary lead of the cylinder#1 ignition coil.
Diagnostic code No. 30
Cylinder-#1 ignition coil
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the coupler for any pins Cranking the
• Cylinder-#1 ignition coil coupler
that may be pulled out.
engine.
• Main wire harness ECU coupler
• Check the locking condition of (Connect the
• Sub-wire harness 1 coupler
the coupler.
cylinder-#1 igni• If there is a malfunction, repair it tion coil couand connect coupler securely.
pler.)
2
Open or short circuit in wire harness • Repair or replace if there is an
and/or sub-wire harness 1.
open or short circuit.
• Between cylinder-#1 ignition
coil coupler and ECU coupler.
(Red/Black–Red/Black)
(Orange–Orange)
3
Defective cylinder-#1 ignition coil.
• Execute the diagnostic mode.
(Code No.30)
• Test the primary and secondary
coils for continuity.
• Replace if defective.
Refer to "CHECKING THE
IGNITION COILS" on page 883.
Fault code No.
33
Symptom
8-52
FUEL INJECTION SYSTEM
Open circuit detected in the primary lead of the cylinder#2 ignition coil.
Diagnostic code No. 31
Cylinder-#2 ignition coil
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the couplers for any pins Cranking the
• Cylinder-#2 ignition coil coupler
that may be pulled out.
engine.
• Main wire harness ECU coupler
• Check the locking condition of (Connect the
• Sub-wire harness 1 coupler
the couplers.
cylinder-#2 igni• If there is a malfunction, repair it tion coil couand connect the coupler
pler.)
securely.
2
Open or short circuit in wire harness • Repair or replace if there is an
and/or sub-wire harness 1.
open or short circuit.
• Between cylinder-#2 ignition
coil coupler and ECU coupler.
(Red/Black–Red/Black)
(Gray/Red–Gray/Red)
3
Defective cylinder-#2 ignition coil.
• Execute the diagnostic mode.
(Code No.31)
• Test the primary and secondary
coils for continuity.
• Replace if defective.
Refer to "CHECKING THE
IGNITION COILS" on page 883.
Fault code No.
34
Symptom
8-53
FUEL INJECTION SYSTEM
Open circuit detected in the primary lead of the cylinder#3 ignition coil.
Diagnostic code No. 32
Cylinder-#3 ignition coil
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the couplers for any pins Cranking the
• Cylinder-#3 ignition coil coupler
that may have pulled out.
engine.
• Main wire harness ECU coupler
• Check the locking condition of (Connect the
• Sub-wire harness 1 coupler
the couplers.
cylinder-#3 igni• If there is a malfunction, repair it tion coil couand connect the coupler
pler.)
securely.
2
Open or short circuit in wire harness • Repair or replace if there is an
and/or sub-wire harness 1.
open or short circuit.
• Between cylinder-#3 ignition
coil coupler and ECU coupler.
(Red/Black–Red/Black)
(Orange/Green–Orange/Green)
3
Defective cylinder-#3 ignition coil.
• Execute the diagnostic mode.
(Code No.32)
• Test the primary and secondary
coils for continuity.
• Replace if defective.
Refer to "CHECKING THE
IGNITION COILS" on page 883.
Fault code No.
35
Symptom
8-54
FUEL INJECTION SYSTEM
Open circuit detected in the primary lead of the cylinder#4 ignition coil.
Diagnostic code No. 33
Cylinder-#4 ignition coil
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the couplers for any pins Cranking the
• Cylinder-#4 ignition coil coupler
that may have pulled out.
engine.
• Main wire harness ECU coupler
• Check the locking condition of (Connect the
• Sub-wire harness 1 coupler
the couplers.
cylinder-#4 igni• If there is a malfunction, repair it tion coil couand connect the coupler
pler.)
securely.
2
Open or short circuit in wire harness • Repair or replace if there is an
and/or sub-wire harness 1.
open or short circuit.
• Between cylinder-#4 ignition
coil coupler and ECU coupler/
main wire harness.
(Red/Black–Red/Black)
(Gray/Green–Gray/Green)
3
Defective cylinder-#4 ignition coil.
• Execute the diagnostic mode.
(Code No.33)
• Test the primary and secondary
coils for continuity.
• Replace if defective.
Refer to "CHECKING THE
IGNITION COILS" on page 883.
Fault code No.
36
Symptom
8-55
FUEL INJECTION SYSTEM
Fault code No.
39
Symptom Open circuit detected in injector.
36
Injector #1
37
Injector #2
Diagnostic code No.
38
Injector #3
39
Injector #4
Orde Item/components and probable
Check or maintenance job
r
cause
1
Connections
• Check the couplers for any pins
• Injector coupler
that may have pulled out.
• Main wire harness ECU coupler
• Check the locking condition of
• Sub-wire harness 2 coupler
the couplers.
• If there is a malfunction, repair it
and connect the coupler
securely.
2
Open or short circuit in wire harness • Repair or replace if there is an
and/or sub-wire harness 2.
open or short circuit.
• Between injector coupler and
ECU coupler.
(Red/Blue–Red/Blue)
#1: (Red/Black–Red/Black)
#2: (Green/Black–Green/Black)
#3: (Blue/Black–Blue/Black)
#4: (Orange/Black–Orange/
Black)
3
Defective injector.
• Execute the diagnostic mode.
(Code Nos.36, 37, 38, 39)
• Replace if defective.
Refer to "CHECKING THE
INJECTORS" on page 7-6.
8-56
Reinstatement
method
Cranking the
engine.
(Connect the
fuel injector
couplers.)
FUEL INJECTION SYSTEM
Fault code No. 41 Symptom Lean angle sensor: open or short circuit detected.
Diagnostic code No. 08
Lean angle sensor
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the coupler for any pins Reinstated
• Lean angle sensor coupler
that may be pulled out.
automatically if
• Main wire harness ECU coupler
• Check the locking condition of a normal signal
the coupler.
is received.
• If there is a malfunction, repair it
and connect the coupler
securely.
2
Open or short circuit in lead wire.
• Repair or replace if there is an
open or short circuit.
• Between lean angle sensor
coupler and ECU coupler.
(Blue–Blue)
(Yellow/Green–Yellow/Green)
(Black/Blue–Black/Blue)
3
Defective lean angle sensor.
• Execute the diagnostic mode.
(Code No.08)
• Replace if defective.
Refer to "CHECKING THE
LEAN ANGLE SENSOR" on
page 8-84.
8-57
FUEL INJECTION SYSTEM
ANo normal signals are received from the speed sensor.
BOpen circuit is detected in the neutral switch.
A
07 Speed sensor
Diagnostic code No.
B
21 Neutral switch
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
A-1
Installed state of speed sensor.
Check for looseness or pinching. Starting the
A-2
Connections
• Check the couplers for any pins engine, and
activating the
• Speed sensor coupler
that may be pulled out.
• Main wire harness ECU coupler
• Check the locking condition of speed sensor
by operating the
the couplers.
• If there is a malfunction, repair it vehicle.
and connect the coupler
securely.
A-3
Open or short circuit in lead.
• Repair or replace if there is an
open or short circuit.
• Between speed sensor coupler
and ECU coupler.
(Blue–Blue)
(White/Yellow–White/Yellow)
(Black/Blue–Black/Blue)
A-4
Defective speed sensor.
• Execute the diagnostic mode.
(Code No. 07)
• Replace if defective.
Refer to "CHECKING THE
SPEED SENSOR" on page 887.
B-1
Installed state of neutral switch.
Check for looseness or pinching.
B-2
Connections
• Check the couplers for any pins
• Neutral switch coupler
that may be pulled out.
• Main wire harness ECU coupler
• Check the locking condition of
the couplers.
• If there is a malfunction, repair it
and connect the coupler
securely.
B-3
Open circuit in neutral switch lead.
• Repair or replace if there is an
open circuit.
• Between neutral switch coupler
and relay unit coupler.
(Sky blue–Sky blue)
• Between relay unit coupler and
ECU coupler.
(Blue/Yellow–Blue/Yellow)
B-4
Defective neutral switch.
• Execute the diagnostic mode.
(Code No.21)
• Replace if defective.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
B-5
Faulty shift drum (neutral detection
• Replace if defective.
area).
Refer to "TRANSMISSION" on
page 5-84.
Fault code No.
42
Symptom
8-58
FUEL INJECTION SYSTEM
Power supply to the injectors and fuel pump is not normal.
Diagnostic code No. 09
Fuel system voltage (battery voltage)
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the coupler for any pins Turning the
• Relay unit coupler (fuel pump relay)
that may have pulled out.
main switch to
• Main wire harness ECU coupler
• Check the locking condition of “ON” when the
the coupler.
engine stop
• If there is a malfunction, repair it switch is set to
and connect the coupler
“ ”.
securely.
2
Open or short circuit in the wire har• Repair or replace if there is an
ness.
open or short circuit.
• Between relay unit coupler and
ECU coupler.
(Blue/Yellow–Blue/Yellow)
(Red/Blue–Red/Blue)
• Between relay unit coupler and
starter relay coupler.
(Red–Red)
• Between relay unit coupler and
right handlebar switch coupler.
(Red/Black–Red/Black)
3
Malfunction or open circuit in fuel
• Execute the diagnostic mode.
pump relay.
(Code No. 09)
• Replace if defective.
• If there is no malfunction with
the fuel pump relay, replace the
ECU.
Fault code No.
43
Symptom
An error is detected while reading or writing on EEPROM
(CO adjustment value).
Diagnostic code No. 60
EEPROM fault cylinder No.
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Malfunction in ECU.
• Set the faulty cylinder’s exhaust Turning the
gas volume.
main switch to
1 Execute the diagnostic mode “ON”.
(Code No. 60) to check the
(Readjust the
faulty cylinder number. (If mul- exhaust gas voltiple cylinders are defective,
ume after it is
the numbers of the faulty cyl- reinstated.)
inders are displayed alternately at 2-second intervals.)
2 Execute the CO adjustment
mode and set the exhaust gas
volume of the faulty cylinder to
“0”.
• Replace ECU if it does not
recover from the malfunction.
Fault code No.
44
Symptom
8-59
FUEL INJECTION SYSTEM
Fault code No. 46 Symptom Power supply is not normal.
Diagnostic code No. —
—
Orde Item/components and probable
Check or maintenance job
r
cause
1
Malfunction in rectifier/regulator
• Replace if defective.
Refer to "CHARGING SYSTEM" on page 8-11.
2
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit in the
charging system’s wiring.
Refer to "CHARGING SYSTEM" on page 8-11.
Reinstatement
method
Starting the
engine and
operating it at
idle.
Faulty ECU memory. (When this malfunction is detected
Symptom in the ECU, the fault code number might not appear on
the meter.)
Diagnostic code No. —
—
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Malfunction in ECU.
Replace the ECU.
Turning the
main switch to
NOTE:
Be sure to turn the main switch to “ON”.
Fault code No.
50
“OFF” before replacing the ECU.
8-60
FUEL INJECTION SYSTEM
Throttle position sensor (for throttle cable pulley): open
or short circuit detected.
Fault code No. 59 Symptom
Throttle position sensor (for throttle cable pulley): coupler connection is loose.
14
Throttle position sensor (for throttle cable pulley) signal 1
Diagnostic code No.
15
Throttle position sensor (for throttle cable pulley) signal 2
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Installed state of throttle position sen- • Check for looseness or pinchTurning the
sor (for throttle cable pulley).
ing.
main switch to
• Check that the sensor is
“ON”.
installed in the specified position.
2
Connections
• Check the couplers for any pins
• Throttle position sensor (for throttle
that may be pulled out.
cable pulley) coupler
• Check the locking condition of
• Main wire harness ECU coupler
the couplers.
• If there is a malfunction, repair it
and connect the coupler
securely.
3
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between throttle position sensor
(for throttle cable pulley) coupler
and ECU coupler.
(Black/Blue–Black/Blue)
(White–White)
(Blue–Blue)
(Black–Black)
4
Defective throttle position sensor (for • Execute the diagnostic mode.
throttle cable pulley).
(Code Nos. 14, 15)
• Replace if defective.
Refer to "CHECKING THE
THROTTLE POSITION SENSOR (FOR THROTTLE CABLE
PULLEY)" on page 8-89.
8-61
FUEL INJECTION SYSTEM
Throttle servo motor: open or short circuit detected.
Fault code No. 60 Symptom Defective throttle servo motor.
Malfunction in ECU (servo motor driving system).
01
Throttle position sensor (for throttle valves) signal 1
Diagnostic code No.
13
Throttle position sensor (for throttle valves) signal 2
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Installed state of accelerator position • Check for looseness or pinchTurning the
sensor (for throttle valves).
ing.
main switch to
• Check that the sensor is
“ON”.
installed in the specified position.
2
Connections
• Check the couplers for any pins
• Throttle servo motor coupler
that may be pulled out.
• Main wire harness ECU coupler
• Check the locking condition of
the couplers.
• If there is a malfunction, repair it
and connect the coupler
securely.
3
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between throttle servo motor
coupler and ECU coupler.
(Yellow/Red–Yellow/Red)
(Light green/Red–Light green/
Red)
4
Defective throttle servo motor.
• Execute the diagnostic mode.
(Code Nos. 01, 13)
• Replace the throttle body
assembly if defective.
5
Malfunction in ECU.
Replace the ECU.
Fault code No. Er-1 Symptom No signals are received from the ECU.
Diagnostic code No. —
—
Orde Item/components and probable
Check or maintenance job
r
cause
1
Connections
• Check the couplers for any pins
• Main wire harness ECU coupler
that may be pulled out.
• Main wire harness meter assembly • Check the locking condition of
coupler
the coupler.
• If there is a malfunction, repair it
and connect the coupler
securely.
2
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between meter assembly coupler and ECU coupler.
(Yellow/Blue–Yellow/Blue)
3
Malfunction in meter assembly.
Replace the meter assembly.
4
Malfunction in ECU.
Replace the ECU.
8-62
Reinstatement
method
Turning the
main switch to
“ON”.
FUEL INJECTION SYSTEM
No signals are received from the ECU within the specified
duration.
Diagnostic code No. —
—
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the coupler for any pins Turning the
• Main wire harness ECU coupler
that may be pulled out.
main switch to
• Main wire harness meter assembly • Check the locking condition of “ON”.
coupler
the coupler.
• If there is a malfunction, repair it
and connect the coupler
securely.
2
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between meter assembly coupler and ECU coupler.
(Yellow/Blue–Yellow/Blue)
3
Malfunction in meter assembly.
Replace the meter assembly.
4
Malfunction in ECU.
Replace the ECU.
Fault code No.
Er-2 Symptom
Fault code No. Er-3 Symptom Data from the ECU cannot be received correctly.
Diagnostic code No. —
—
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the couplers for any pins Turning the
• Main wire harness ECU coupler
that may be pulled out.
main switch to
• Main wire harness meter assembly • Check the locking condition of “ON”.
coupler
the coupler.
• If there is a malfunction, repair it
and connect the coupler
securely.
2
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between meter assembly coupler and ECU coupler.
(Yellow/Blue–Yellow/Blue)
3
Malfunction in meter assembly.
Replace the meter assembly.
4
Malfunction in ECU.
Replace the ECU.
8-63
FUEL INJECTION SYSTEM
Fault code No. Er-4 Symptom Non-registered data has been received from the meter.
Diagnostic code No. —
—
Orde Item/components and probable
Reinstatement
Check or maintenance job
r
cause
method
1
Connections
• Check the couplers for any pins Turning the
• Main wire harness ECU coupler
that may be pulled out.
main switch to
• Main wire harness meter assembly • Check the locking condition of “ON”.
coupler
the coupler.
• If there is a malfunction, repair it
and connect the coupler
securely.
2
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between meter assembly coupler and ECU coupler.
(Yellow/Blue–Yellow/Blue)
3
Malfunction in meter assembly.
Replace the meter assembly.
4
Malfunction in ECU
Replace the ECU.
8-64
FUEL PUMP SYSTEM
EAS27550
FUEL PUMP SYSTEM
EAS27560
CIRCUIT DIAGRAM
8-65
FUEL PUMP SYSTEM
1. Main switch
4. Main fuse
7. Battery
8. Fuel injection system fuse
11.Starting circuit cut-off relay
14.Fuel pump
18.ECU (engine control unit)
46.Multi-function meter
56.Engine stop switch
77.Ignition fuse
85.Ground
86.Battery negative lead
8-66
FUEL PUMP SYSTEM
EAS27570
TROUBLESHOOTING
If the fuel pump fails to operate.
NOTE:
• Before troubleshooting, remove the following part(s):
1 Rider seat
2 Passenger seat
3 Fuel tank
4 Side cowlings
1 Check the fuses.
(Main, ignition and fuel injection
system)
Refer to "CHECKING THE FUSES"
on page 8-77.
NG→
Replace the fuse(s).
OK↓
2 Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-77.
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
OK↓
3 Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the main switch.
OK↓
4 Check the engine stop switch.
Refer to "CHECKING THE
SWITCHES" on page 8-73.
NG→
Replace the right handlebar switch.
OK↓
5 Check the starting circuit cut-off
relay.
Refer to "CHECKING THE
RELAYS" on page 8-80.
NG→
Replace the starting circuit cut-off
relay.
OK↓
6 Check the fuel pump.
Refer to "CHECKING THE FUEL
PRESSURE" on page 7-6.
NG→
OK↓
8-67
Replace the fuel pump.
FUEL PUMP SYSTEM
7 Check the entire fuel pump system’s wiring.
Refer to "FUEL PUMP SYSTEM"
on page 8-65.
NG→
Properly connect or repair the fuel
pump system’s wiring.
OK↓
Replace the ECU.
8-68
ELECTRICAL COMPONENTS
EAS27970
ELECTRICAL COMPONENTS
8-69
ELECTRICAL COMPONENTS
1. Main switch
2. Front brake light switch
3. Clutch switch
4. Fuel injection system fuse
5. Starter relay
6. Battery
7. Main fuse
8. Neutral switch
9. Rear brake light switch
10.EXUP servo motor
11.Sidestand switch
12.O2 sensor
13.Speed sensor
14.Oil level switch
15.Ignition coil
16.Radiator fan motor
17.Rectifier/regulator
18.Horn
19.Fuse box (radiator fan motor, signaling system, ignition, ETV, backup)
20.Fuse box (headlight)
8-70
ELECTRICAL COMPONENTS
8-71
ELECTRICAL COMPONENTS
1. Air temperature sensor
2. Atmospheric pressure sensor
3. Fuel pump
4. Coolant temperature sensor
5. Starting circuit cut-off relay
6. Turn signal relay
7. ECU (engine control unit)
8. Lean angle sensor
9. Crankshaft position sensor
10.Intake air pressure sensor
11.Throttle servo motor
12.Throttle position sensor (for throttle cable
pulley)
13.Throttle position sensor (for throttle valves)
14.Cylinder identification sensor
15.Radiator fan motor relay
16.Headlight relay (dimmer)
17.Headlight relay (on/off)
8-72
ELECTRICAL COMPONENTS
EAS27980
CHECKING THE SWITCHES
8-73
ELECTRICAL COMPONENTS
1. Main switch
2. Horn switch
3. Dimmer switch
4. Turn signal switch
5. Clutch switch
6. Sidestand switch
7. Engine stop switch
8. Front brake light switch
9. Start switch
10.Oil level switch
11.Neutral switch
12.Rear brake light switch
8-74
ELECTRICAL COMPONENTS
Check each switch for continuity with the pocket tester. If the continuity reading is incorrect, check
the wiring connections and if necessary, replace the switch.
ECA14370
CAUTION:
Never insert the tester probes into the coupler terminal slots “a”. Always insert the probes
from the opposite end of the coupler, taking care not to loosen or damage the leads.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
NOTE:
• Before checking for continuity, set the pocket tester to “0” and to the “Ω × 1” range.
• When checking for continuity, switch back and forth between the switch positions a few times.
The switches and their terminal connections are illustrated as in the following example of the main
switch.
The switch positions “a” are shown in the far left column and the switch lead colors “b” are shown in
the top row.
The continuity (i. e., a closed circuit) between switch terminals at a given switch position is indication
by “
” There is continuity between red, brown/blue, and brown/red when the switch is set to
“ON” and between red and brown/red when the switch is set to “ ”.
8-75
ELECTRICAL COMPONENTS
wise the transparency of the glass, the
life of the bulb, and the luminous flux will
be adversely affected. If the headlight
bulb gets soiled, thoroughly it with a cloth
moistened with alcohol or lacquer thinner.
EAS27990
CHECKING THE BULBS AND BULB SOCKETS
Check each bulb and bulb socket for damage
or wear, proper connections, and also for continuity between the terminals.
Damage/wear → Repair or replace the bulb,
bulb socket or both.
Improperly connected → Properly connect.
No continuity → Repair or replace the bulb,
bulb socket or both.
2. Check:
• Bulb (for continuity)
(with the pocket tester)
No continuity → Replace.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Types of bulbs
The bulbs used on this vehicle are shown in
the illustration.
• Bulbs “a” are used for the headlights and
usually use a bulb holder that must be
detached before removing the bulb.
• Bulbs “b” is used for turn signal and can be
removed from the socket by pushing and
turning the bulb counterclockwise.
• Bulbs “c” are used for auxiliary lights and can
be removed from their respective socket by
carefully pulling them out.
NOTE:
Before checking for continuity, set the pocket
tester to “0” and to the “Ω × 1” range.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the positive tester probe to terminal “1” and the negative tester probe to terminal “2”, and check the continuity.
b. Connect the positive tester probe to terminal “1” and the negative tester probe to terminal “3” and check the continuity.
c. If either of the readings indicate no continuity, replace the bulb.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
Checking the condition of the bulbs
The following procedure applies to all of the
bulbs.
1. Remove:
• Bulb
EWA13320
WARNING
Checking the condition of the bulb sockets
The following procedure applies to all of the
bulb sockets.
1. Check:
• Bulb socket (for continuity)
(with the pocket tester)
No continuity → Replace.
Since the headlight bulb gets extremely
hot, keep flammable products and your
hands away from the bulb until it has
cooled down.
ECA14380
CAUTION:
• Be sure to hold the socket firmly when
removing the bulb. Never pull the lead,
otherwise it may be pulled out of the terminal in the coupler.
• Avoid touching the glass part of the headlight bulb to keep it free from oil, other-
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
8-76
ELECTRICAL COMPONENTS
d. If the fuse immediately blows again, check
the electrical circuit.
NOTE:
Check each bulb socket for continuity in the
same manner as described in the bulb section;
however, note the following.
Fuses
Main
Headlight
Signaling system
Buckup
ETV
Ignition
Radiator fan motor
Reserve
Reserve
Reserve
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Install a good bulb into the bulb socket.
b. Connect the pocket tester probes to the
respective leads of the bulb socket.
c. Check the bulb socket for continuity. If any
of the readings indicate no continuity,
replace the bulb socket.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28000
CHECKING THE FUSES
The following procedure applies to all of the
fuses.
EWA13310
WARNING
ECA13680
CAUTION:
Never use a fuse with an amperage rating
other than that specified. Improvising or
using a fuse with the wrong amperage rating may cause extensive damage to the
electrical system, cause the lighting and
ignition systems to malfunction and could
possibly cause a fire.
To avoid a short circuit, always set the main
switch to “OFF” when checking or replacing a fuse.
1.
•
•
•
2.
•
Amperage
Q’ty
rating
50 A
1
25 A
1
7.5 A
1
7.5 A
1
7.5 A
1
15 A
1
15 A
2
7.5 A
1
1.5 A
1
25 A
1
Remove:
Rider seat
Passenger seat
Side cowlings
Check:
Fuse
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
4.
•
•
•
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester to the fuse and
check the continuity.
Install:
Side cowlings
Passenger seat
Rider seat
EAS28030
NOTE:
CHECKING AND CHARGING THE BATTERY
Set the pocket tester selector to “Ω × 1”.
EWA13290
WARNING
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Batteries generate explosive hydrogen gas
and contain electrolyte which is made of
poisonous and highly caustic sulfuric acid.
Therefore, always follow these preventive
measures:
• Wear protective eye gear when handling
or working near batteries.
• Charge batteries in a well-ventilated area.
• Keep batteries away from fire, sparks or
open flames (e.g., welding equipment,
lighted cigarettes).
• DO NOT SMOKE when charging or handling batteries.
• KEEP BATTERIES AND ELECTROLYTE
OUT OF REACH OF CHILDREN.
b. If the pocket tester indicates “∞”, replace
the fuse.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Replace:
• Blown fuse
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Set the main switch to “OFF”.
b. Install a new fuse of the correct amperage
rating.
c. Set on the switches to verify if the electrical
circuit is operational.
8-77
ELECTRICAL COMPONENTS
• Avoid bodily contact with electrolyte as it
can cause severe burns or permanent eye
injury.
FIRST AID IN CASE OF BODILY CONTACT:
EXTERNAL
• Skin — Wash with water.
• Eyes — Flush with water for 15 minutes
and get immediate medical attention.
INTERNAL
• Drink large quantities of water or milk followed with milk of magnesia, beaten egg
or vegetable oil. Get immediate medical
attention.
3.
•
4.
•
ECA13660
CAUTION:
Remove:
Battery
Check:
Battery charge
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
• This is a sealed battery. Never remove the
sealing caps because the balance
between cells will not be maintained and
battery performance will deteriorate.
• Charging time, charging amperage and
charging voltage for an MF battery are different from those of conventional batteries. The MF battery should be charged as
explained in the charging method illustrations. If the battery is overcharged, the
electrolyte level will drop considerably.
Therefore, take special care when charging the battery.
a. Connect a pocket tester to the battery terminals.
• Positive tester probe →
positive battery terminal
• Negative tester probe →
negative battery terminal
NOTE:
• The charge state of an MF battery can be
checked by measuring its open-circuit voltage (i.e., the voltage when the positive battery terminal is disconnected).
• No charging is necessary when the open-circuit voltage equals or exceeds 12.8 V.
NOTE:
Since MF batteries are sealed, it is not possible to check the charge state of the battery by
measuring the specific gravity of the electrolyte. Therefore, the charge of the battery has to
be checked by measuring the voltage at the
battery terminals.
b. Check the charge of the battery, as shown
in the charts and the following example.
Example
Open-circuit voltage = 12.0 V
Charging time = 6.5 hours
Charge of the battery = 20–30%
1. Remove:
• Rider seat
Refer to "GENERAL CHASSIS" on page 41.
2. Disconnect:
• Battery leads
(from the battery terminals)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
5. Charge:
• Battery
(refer to the appropriate charging method
illustration)
EWA13300
ECA13640
WARNING
CAUTION:
Do not quick charge a battery.
First, disconnect the negative battery lead
“1”, and then positive battery lead “2”.
ECA13670
CAUTION:
• Never remove the MF battery sealing
caps.
8-78
ELECTRICAL COMPONENTS
• Do not use a high-rate battery charger
since it forces a high-amperage current
into the battery quickly and can cause
battery overheating and battery plate
damage.
• If it is impossible to regulate the charging
current on the battery charger, be careful
not to overcharge the battery.
• When charging a battery, be sure to
remove it from the vehicle. (If charging
has to be done with the battery mounted
on the vehicle, disconnect the negative
battery lead from the battery terminal.)
• To reduce the chance of sparks, do not
plug in the battery charger until the battery charger leads are connected to the
battery.
• Before removing the battery charger lead
clips from the battery terminals, be sure
to turn off the battery charger.
• Make sure the battery charger lead clips
are in full contact with the battery terminal and that they are not shorted. A corroded battery charger lead clip may
generate heat in the contact area and a
weak clip spring may cause sparks.
• If the battery becomes hot to the touch at
any time during the charging process,
disconnect the battery charger and let the
battery cool before reconnecting it. Hot
batteries can explode!
• As shown in the following illustration, the
open-circuit voltage of an MF battery stabilizes about 30 minutes after charging
has been completed. Therefore, wait 30
minutes after charging is completed
before measuring the open-circuit voltage.
NOTE:
Set the charging voltage at 16–17 V.If the setting is lower, charging will be insufficient. If too
high, the battery will be over-charged.
c. Make sure that the current is higher than
the standard charging current written on
the battery.
NOTE:
If the current is lower than the standard charging current written on the battery, set the
charging voltage adjust dial at 20–24 V and
monitor the amperage for 3–5 minutes to
check the battery.
• Reach the standard charging current
Battery is good.
• Does not reach the standard charging current
Replace the battery.
d. Adjust the voltage so that the current is at
the standard charging level.
e. Set the time according to the charging time
suitable for the open-circuit voltage.
Refer to “Battery condition checking steps”.
f. If charging requires more than 5 hours, it is
advisable to check the charging current
after a lapse of 5 hours. If there is any
change in the amperage, readjust the voltage to obtain the standard charging current.
g. Measure the battery open-circuit voltage
after leaving the battery unused for more
than 30 minutes.
12.8 V or more --- Charging is complete.
12.7 V or less --- Recharging is required.
Under 12.0 V --- Replace the battery.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
Charging method using a variable-current
(voltage) charger
a. Measure the open-circuit voltage prior to
charging.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
Charging method using a constant voltage
charger
a. Measure the open-circuit voltage prior to
charging.
NOTE:
Voltage should be measured 30 minutes after
the machine is stopped.
NOTE:
Voltage should be measured 30 minutes after
the machine is stopped.
b. Connect a charged and AMP meter to the
battery and start charging.
b. Connect a charger and AMP meter to the
battery and start charging.
8-79
ELECTRICAL COMPONENTS
c. Make sure that the current is higher than
the standard charging current written on
the battery.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
NOTE:
If the current is lower than the standard charging current written on the battery, This type of
battery charger cannot charge the MF battery.
A variable voltage charger is recommended.
1. Disconnect the relay from the wire harness.
2. Connect the pocket tester (Ω × 1) and battery (12 V) to the relay terminal as shown.
Check the relay operation.
Out of specification → Replace.
d. Charge the battery until the battery’s charging voltage is 15 V.
NOTE:
Set the charging time at 20 hours (maximum).
e. Measure the battery open-circuit voltage
after leaving the battery unused for more
than 30 minutes.
12.8 V or more --- Charging is complete.
12.7 V or less --- Recharging is required.
Under 12.0 V --- Replace the battery.
1.
2.
3.
4.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
6.
•
7.
•
Install:
Battery
Connect:
Battery leads
(to the battery terminals)
Positive battery terminal
Negative battery terminal
Positive tester probe
Negative tester probe
Relay operation
Continuity/No continuity
(between “3” to “4”)
ECA13630
Relay unit (starting circuit cut-off relay)
CAUTION:
First, connect the positive battery lead “1”,
and then the negative battery lead “2”.
8. Check:
• Battery terminals
Dirt → Clean with a wire brush.
Loose connection → Connect properly.
9. Lubricate:
• Battery terminals
1.
2.
3.
4.
Recommended lubricant
Dielectric grease
10. Install:
• Rider seat
Refer to "GENERAL CHASSIS" on page 41.
Positive battery terminal
Negative battery terminal
Positive tester probe
Negative tester probe
Result
Continuity/No continuity
EAS28040
CHECKING THE RELAYS
Check each switch for continuity with the
pocket tester. If the continuity reading is incorrect, replace the relay.
8-80
ELECTRICAL COMPONENTS
Relay unit (fuel pump relay)
4. Negative tester probe
Result
Continuity/No continuity
Radiator fan motor relay
1.
2.
3.
4.
Positive battery terminal
Negative battery terminal
Positive tester probe
Negative tester probe
Result
Continuity/No continuity
1.
2.
3.
4.
Headlight relay (on/off)
Positive battery terminal
Negative battery terminal
Positive tester probe
Negative tester probe
Result
Continuity/No continuity
EAS4C81019
1.
2.
3.
4.
CHECKING THE TURN SIGNAL RELAY
1. Check:
• Turn signal relay input voltage
Out of specification → The wiring circuit
from the main switch to the turn signal relay
coupler is faulty and must be repaired.
Positive battery terminal
Negative battery terminal
Positive tester probe
Negative tester probe
Turn signal relay input voltage
DC 12 V
Result
Continuity/No continuity
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (DC 20 V) to the
turn signal relay terminal as shown.
Headlight relay (dimmer)
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
Blue/Red “1”
• Negative tester probe →
Ground
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
8-81
ELECTRICAL COMPONENTS
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Continuity
Positive tester probe → Sky
blue “1”
Negative tester probe →
Black/Yellow “2”
No continuity
Positive tester probe → Black/
Yellow “2”
Negative tester probe → Sky
blue “1”
Continuity
Positive tester probe → Sky
blue “1”
Negative tester probe → Blue/
Yellow “3”
No continuity
Positive tester probe → Blue/
Yellow “3”
Negative tester probe → Sky
blue “1”
Continuity
Positive tester probe → Sky
blue “1”
Negative tester probe → Sky
blue/White “4”
No continuity
Positive tester probe → Sky
blue/White “4”
Negative tester probe → Sky
blue “1”
Continuity
Positive tester probe → Blue/
Black “5”
Negative tester probe → Blue/
Yellow “3”
No continuity
Positive tester probe → Blue/
Yellow “3”
Negative tester probe → Blue/
Black “5”
b. Turn the main switch to “ON”.
c. Measure the turn signal relay input voltage.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Check:
• Turn signal relay output voltage
Out of specification → Replace.
Turn signal relay output voltage
DC 12 V
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (DC 20 V) to the
turn signal relay terminal as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
Brown/White “1”
• Negative tester probe →
Ground
b. Turn the main switch to “ON”.
c. Measure the turn signal relay output voltage.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28050
CHECKING THE RELAY UNIT (DIODE)
1. Check:
• Relay unit (diode)
Out of specification → Replace.
8-82
ELECTRICAL COMPONENTS
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
c. Measure the primary coil resistance.
a. Disconnect the relay unit coupler from the
wire harness.
b. Connect the pocket tester (Ω × 1) to the
relay unit terminal as shown.
c. Check the relay unit (diode) for continuity.
d. Check the relay unit (diode) for no continuity.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Check:
• Secondary coil resistance
Out of specification → Replace.
Secondary coil resistance
5.02–6.79 kΩ at 20 °C (68 °F)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
EAS28100
a. Disconnect the ignition coil leads from the
ignition coil.
b. Connect the pocket tester (Ω × 1k) to the
ignition coil as shown.
CHECKING THE IGNITION COILS
The following procedure applies to all of the
ignition coils.
1. Check:
• Primary coil resistance
Out of specification → Replace.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Primary coil resistance
0.85–1.15 Ω at 20 °C (68°F)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
• Negative tester probe
Ignition coil terminal “1”
• Positive tester probe
Spark plug terminal “2”
a. Disconnect the ignition coil connectors
from the ignition coil terminals.
b. Connect the pocket tester (Ω × 1) to the
ignition coil as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Ignition coil terminal
• Negative tester probe
Ignition coil terminal
c. Measure the secondary coil resistance.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Check:
• Ignition spark gap
Out of specification → Replace.
8-83
ELECTRICAL COMPONENTS
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Minimum ignition spark gap
6.0 mm (0.24 in)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Disconnect the ignition coil from the spark
plug.
b. Connect the ignition checker/dynamic
spark tester “2” as shown.
• Positive tester probe
Gray “1”
• Negative tester probe
Black “2”
Ignition checker
90890-06754
Opama pet-4000 spark checker
YM-34487
b. Measure the crankshaft position sensor
resistance.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28130
CHECKING THE LEAN ANGLE SENSOR
1. Remove:
• Lean angle sensor
(from the bracket.)
2. Check:
• Lean angle sensor out put voltage
Out of specification → Replace.
1. Ignition coil
c. Set the main switch to “ON”.
d. Measure the ignition spark gap “a”.
e. Crank the engine by pushing the starter
switch and gradually increase the spark
gap until a misfire occurs.
Lean angle sensor out put voltage
Less than 65°: 0.4–1.4 V
More than 65°: 3.7–4.4 V
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28120
CHECKING THE CRANKSHAFT POSITION
SENSOR
1. Disconnect:
• Crankshaft position sensor coupler
(from the wire harness)
2. Check:
• Crankshaft position sensor resistance
Out of specification → Replace the crankshaft position sensor.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the lean angle sensor coupler to
the wire harness.
b. Connect the pocket tester (DC 20 V) to the
lean angle sensor coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Crankshaft position sensor
resistance
336–504 Ω at 20°C (68°F)
• Positive tester probe
Yellow/Green “1”
• Negative tester probe
Black/Blue “2”
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (Ω × 100) to the
crankshaft position sensor coupler as
shown.
8-84
ELECTRICAL COMPONENTS
EAS28150
CHECKING THE STATOR COIL
1. Disconnect:
• Stator coil coupler
(from the rectifier/regulator)
2. Check:
• Stator coil resistance
Out of specification → Replace the stator
coil.
Stator coil resistance
0.14–0.18 Ω at 20°C (68°F)
c. When turn the lean angle sensor to 65°.
d. Measure the lean angle sensor out put voltage.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (Ω × 1) to the
stator coil coupler as shown.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
EAS4C81020
CHECKING THE STARTER MOTOR OPERATION
1. Check:
• Starter motor operation
Does not operate → Perform the electric
starting system troubleshooting, starting
with step 4.
Refer to "TROUBLESHOOTING" on page
8-9.
• Positive tester probe
White “1”
• Negative tester probe
White “2”
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
• Positive tester probe
White “1”
• Negative tester probe
White “3”
a. Connect the positive battery terminal “1”
and starter motor lead “2” with a jumper
lead “3”.
EWA13810
WARNING
• Positive tester probe
White “2”
• Negative tester probe
White “3”
• A wire that is used as a jumper lead must
have at least the same capacity of the battery lead, otherwise the jumper lead may
burn.
• This check is likely to produce sparks,
therefore, make sure no flammable gas or
fluid is in the vicinity.
b. Measure the stator coil resistance.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28170
CHECKING THE RECTIFIER/REGULATOR
1. Check:
• Charging voltage
Out of specification → Replace the rectifier/
regulator.
b. Check the starter motor operation.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
8-85
ELECTRICAL COMPONENTS
• Positive tester probe
Horn terminal “1”
• Negative tester probe
Horn terminal “2”
Charging voltage
14 V at 5000 r/min
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Set the engine tachometer to the ignition
coil of cylinder #1.
b. Connect the pocket tester (AC 20 V) to the
rectifier/regulator coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Red “1”
• Negative tester probe
Black “2”
c. Measure the horn resistance.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Check:
• Horn sound
Faulty sound → Adjust or replace.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect a battery (12 V) to the horn.
b. Turn the adjusting screw in direction “a” or
“b” until the specified horn sound is
obtained.
c. Start the engine and let it run at approximately 5000 r/min.
d. Measure the charging voltage.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28180
CHECKING THE HORN
1. Check:
• Horn resistance
Out of specification → Replace.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28190
CHECKING THE OIL LEVEL SWITCH
1. Drain:
• Engine oil
2. Remove:
• Oil level switch
(from the oil pan)
3. Check:
• Oil level switch resistance
Horn resistance
1.15–1.25 Ω at 20°C (68°F)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Disconnect the horn leads from the horn
terminals.
b. Connect the pocket tester (Ω × 1) to the
horn terminals.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
8-86
ELECTRICAL COMPONENTS
(from the fuel tank)
4. Check:
• Fuel sender resistance
Oil level switch
Maximum level position resistance
484–536 Ω at 20°C (68°F)
Minimum level position resistance
114–126 Ω at 20°C (68°F)
Fuel sender resistance
19–141Ω at 20°C (68°F)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (Ω × 1) to the
fuel sender terminal as shown.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (Ω × 100) to the
oil level switch terminal as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Green/white “1”
• Negative tester probe
Black “2”
Maximum level position “A”
• Positive tester probe
Connector (white) “1”
• Negative tester probe
Body earth “2”
Minimum level position “B”
• Positive tester probe
Connector (white) “1”
• Negative tester probe
Body earth “2”
b. Measure the fuel sender resistance.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28240
CHECKING THE SPEED SENSOR
1. Check:
• Speed sensor output voltage
Out of specification → Replace.
Output voltage reading cycle
0.6 V to 4.8 V to 0.6 V to 4.8 V
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
b. Measure the pickup coil resistance.
a. Connect the pocket tester (DC 20 V) to the
speed sensor coupler (wire harness side)
as shown.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28230
CHECKING THE FUEL SENDER
1. Disconnect:
• Fuel pump coupler
• Fuel sender coupler
(from the wire harness)
2. Remove:
• Fuel tank
3. Remove:
• Fuel pump
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
White/Yellow “1”
• Negative tester probe
Black/Blue “2”
8-87
ELECTRICAL COMPONENTS
• Never subject the coolant temperature
sensor to strong shocks. If the coolant
temperature sensor is dropped, replace it.
2. Check:
• Coolant temperature sensor resistance
Out of specification → Replace.
b. Set the main switch to “ON”.
c. Elevate the rear wheel and slowly rotate it.
d. Measure the voltage (DC 5 V) of White/Yellow and Black/Blue. With each full rotation
of the rear wheel, the voltage reading
should cycle from 0.6 V 4.8V to 0.6 V to 4.8
V.
Coolant temperature sensor
resistance
0°C (32°F): 5.21–6.37 kΩ
80°C (176°F): 0.29–0.35 kΩ
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (Ω × 100) to the
coolant temperature sensor “1” as shown.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
EAS4C81021
CHECKING THE RADIATOR FAN MOTORS
1. Check:
• Radiator fan motor
Faulty/rough movement → Replace.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Disconnect the radiator fan motor coupler
from the wire harness.
b. Connect the battery (DC 12 V) as shown.
• Positive tester probe
Coolant temperature sensor terminal
• Negative tester probe
Coolant temperature sensor terminal
• Positive tester probe
Blue “1”
• Negative tester probe
Black “2”
b. Immerse the coolant temperature sensor in
a container filled with coolant “2”.
NOTE:
Make sure the coolant temperature sensor terminals do not get wet.
c. Place a thermometer “3” in the coolant.
c. Measure the radiator fan motor movement.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28260
CHECKING THE COOLANT TEMPERATURE
SENSOR
1. Remove:
• Coolant temperature sensor
EWA14130
WARNING
• Handle the coolant temperature sensor
with special care.
8-88
ELECTRICAL COMPONENTS
d. Slowly heat the coolant, and then let it cool
to the specified temperature indicated in
the table.
e. Check the coolant temperature sensor for
continuity at the temperatures indicated in
the table.
b. Measure the throttle position sensor (for
throttle cable pulley) maximum resistance.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Install:
• Throttle position sensor (for throttle cable
pulley)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
NOTE:
EAS4C81022
When installing the throttle position sensor (for
throttle cable pulley), adjust its angle properly.
Refer to "ADJUSTING THE THROTTLE POSITION SENSOR (FOR THROTTLE CABLE
PULLEY)" on page 7-7.
CHECKING THE THROTTLE POSITION
SENSOR (FOR THROTTLE CABLE PULLEY)
1. Remove:
• Throttle position sensor (for throttle cable
pulley)
(from the throttle body)
2. Check:
• Throttle position sensor (for throttle cable
pulley) maximum resistance
Out of specification → Replace the throttle
position sensor (for throttle cable pulley)
EAS28300
CHECKING THE THROTTLE POSITION
SENSOR (FOR THROTTLE VALVES)
1. Remove:
• Throttle position sensor (for throttle valves)
(from the throttle body)
2. Check:
• Throttle position sensor (for throttle valves)
maximum resistance
Out of specification → Replace the throttle
position sensor (for throttle valves)
Resistance
2.0–3.0 kΩ
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (Ω × 1k) to the
throttle position sensor terminal as shown.
Resistance
2.0–3.0 kΩ
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (Ω × 1k) to the
throttle position sensor as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester prove →
White “1”
• Negative tester prove →
Black “2”
• Positive tester prove →
White “1”
• Negative tester prove →
Black “2”
8-89
ELECTRICAL COMPONENTS
c. Measure the air induction system solenoid
resistance.
b. Measure the throttle position sensor (for
throttle valves) maximum resistance.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28380
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
CHECKING THE ATMOSPHERIC PRESSURE SENSOR
1. Check:
• Atmospheric pressure sensor output voltage
Out of specification → Replace.
3. Install:
• Throttle position sensor (for throttle valves)
NOTE:
When installing the throttle position sensor (for
throttle valves), adjust its angle properly. Refer
to "ADJUSTING THE THROTTLE POSITION
SENSOR (FOR THROTTLE VALVES)" on
page 7-6.
Atmospheric pressure sensor
resistance
3.75–4.25 V
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
EAS28370
a. Connect the pocket tester (DC 20 V) to the
atmospheric pressure sensor coupler (wire
harness side) as shown.
CHECKING THE AIR INDUCTION SYSTEM
SOLENOID
1. Check:
• Air induction system solenoid resistance
Out of specification → Replace.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Solenoid resistance
18–22 Ω at 20°C (68°F)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
• Positive tester probe
Pink “1”
• Negative tester probe
Black/Blue “2”
a. Disconnect the air induction system solenoid coupler from the air induction system
solenoid.
b. Connect the pocket tester (Ω × 1) to the air
induction system solenoid terminal as
shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Brown/Red “1”
• Negative tester probe
Red/White “2”
b. Set the main switch to “ON”.
c. Measure the atmospheric pressure sensor
output voltage.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
8-90
ELECTRICAL COMPONENTS
EAS28390
CHECKING THE CYLINDER IDENTIFICATION SENSOR
1. Check:
• Cylinder identification sensor output voltage
Out of specification → Replace.
Cylinder identification
output voltage
When sensor is on
4.8 V or more
When sensor is off
4.8 V or less
Intake air pressure sensor output voltage
3.15–4.15 V
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (DC 20 V) to the
intake air pressure sensor coupler (wire
harness side) as shown.
sensor
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Pink/White “1”
• Negative tester probe
Black/Blue “2”
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (DC 20 V) to the
cylinder identification sensor coupler (wire
harness side) as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
White/Black “1”
• Negative tester probe
Black/Blue “2”
b. Set the main switch to “ON”.
c. Measure the intake air pressure sensor
output voltage.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
b. Set the main switch to “ON”.
c. Rotate the crankshaft.
d. Measure the voltage (DC 20 V) of White/
Black and Black/Blue. With each full rotation of the crankshaft, the voltage reading
should cycle from 0.8 V to 4.8 V to 0.8 V to
4.8 V.
EAS28420
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
• Handle the intake air temperature sensor
with special care.
• Never subject the intake air temperature
sensor to strong shocks. If the intake air
temperature sensor is dropped, replace it.
CHECKING THE INTAKE AIR TEMPERATURE SENSOR
1. Remove:
• Intake air temperature sensor
(from the air filter case.)
EWA14110
WARNING
EAS28410
CHECKING THE INTAKE AIR PRESSURE
SENSOR
1. Check:
• Intake air pressure sensor output voltage
Out of specification → Replace.
2. Check:
• Intake air temperature sensor resistance
Out of specification → Replace.
8-91
ELECTRICAL COMPONENTS
Intake air pressure sensor
resistance
2.21–2.69 kΩ at 20°C (68°F)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (Ω × 100) to the
intake air temperature sensor terminal as
shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Brown/White “1”
• Negative tester probe
Black/Blue “2”
b. Measure the intake air temperature sensor
resistance.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Install:
• Intake air temperature sensor
Intake air temperature sensor
bolt
1.2 Nm (0.12 m·kg, 0.87 ft·lb)
8-92
ELECTRICAL COMPONENTS
8-93
TROUBLESHOOTING
TROUBLESHOOTING ..................................................................................9-1
GENERAL INFORMATION .....................................................................9-1
STARTING FAILURES ............................................................................9-1
INCORRECT ENGINE IDLING SPEED .................................................9-1
POOR MEDIUM-AND-HIGH-SPEED PERFORMANCE ........................9-2
FAULTY GEAR SHIFTING ......................................................................9-2
SHIFT PEDAL DOES NOT MOVE..........................................................9-2
JUMPS OUT OF GEAR ..........................................................................9-2
FAULTY CLUTCH ...................................................................................9-2
OVERHEATING ......................................................................................9-2
OVER COOLING ....................................................................................9-3
POOR BRAKING PERFORMANCE .......................................................9-3
FAULTY FRONT FORK LEGS ................................................................9-3
UNSTABLE HANDLING..........................................................................9-3
FAULTY LIGHTING OR SIGNALING SYSTEM ......................................9-4
9
TROUBLESHOOTING
Electrical system
1. Battery
• Discharged battery
• Faulty battery
2. Fuse(s)
• Blown, damaged or incorrect fuse
• Improperly installed fuse
3. Spark plug(s)
• Incorrect spark plug gap
• Incorrect spark plug heat range
• Fouled spark plug
• Worn or damaged electrode
• Worn or damaged insulator
4. Ignition coil(s)
• Cracked or broken ignition coil body
• Broken or shorted primary or secondary
coils
• Faulty spark plug lead
5. Ignition system
• Faulty ECU
• Faulty crankshaft position sensor
6. Switches and wiring
• Faulty main switch
• Faulty engine stop switch
• Broken or shorted wiring
• Faulty neutral switch
• Faulty start switch
• Faulty sidestand switch
• Faulty clutch switch
• Improperly grounded circuit
• Loose connections
7. Starting system
• Faulty starter motor
• Faulty starter relay
• Faulty starting circuit cut-off relay
• Faulty starter clutch
EAS28450
TROUBLESHOOTING
EAS28460
GENERAL INFORMATION
NOTE:
The following guide for troubleshooting does
not cover all the possible causes of trouble. It
should be helpful, however, as a guide to basic
troubleshooting. Refer to the relative procedure in this manual for checks, adjustments,
and replacement of parts.
EAS28470
STARTING FAILURES
Engine
1. Cylinder(s) and cylinder head(s)
• Loose spark plug
• Loose cylinder head
• Damaged cylinder head gasket
• Damaged cylinder gasket
• Worn or damaged cylinder
• Incorrect valve clearance
• Improperly sealed valve
• Incorrect valve-to-valve-seat contact
• Incorrect valve timing
• Faulty valve spring
• Seized or damaged valve
2. Piston(s) and piston ring(s)
• Improperly installed piston ring
• Damaged, worn or fatigued piston ring
• Seized piston ring
• Seized or damaged piston
3. Air filter
• Improperly installed air filter
• Clogged air filter element
4. Crankcase and crankshaft
• Improperly assembled crankcase
• Seized or damaged crankshaft
EAS28490
INCORRECT ENGINE IDLING SPEED
Engine
1. Cylinder(s) and cylinder head(s)
• Incorrect valve clearance
• Damaged valve train components
2. Air filter
• Clogged air filter element
Fuel system
1. Fuel tank
• Empty fuel tank
• Clogged fuel filter
• Clogged fuel strainer
• Clogged fuel tank drain hose
• Deteriorated or contaminated fuel
2. Fuel pump
• Faulty fuel pump
• Faulty fuel pump relay
3. Throttle body (-ies)
• Deteriorated or contaminated fuel
• Sucked-in air
Fuel system
1. Throttle body (-ies)
• Damaged or loose throttle body joint
• Improperly synchronized throttle bodies
• Improper throttle cable free play
• Flooded throttle body
• Faulty air induction system
9-1
TROUBLESHOOTING
Electrical system
1. Battery
• Discharged battery
• Faulty battery
2. Spark plug(s)
• Incorrect spark plug gap
• Incorrect spark plug heat range
• Fouled spark plug
• Worn or damaged electrode
• Worn or damaged insulator
3. Ignition coil(s)
• Broken or shorted primary or secondary
coils
• Cracked or broken ignition coil
4. Ignition system
• Faulty ECU
• Crankshaft position sensor
EAS28550
EAS28520
Clutch slips
1. Clutch
• Improperly assembled clutch
• Improperly adjusted clutch cable
• Loose or fatigued clutch spring
• Worn friction plate
• Worn clutch plate
2. Engine oil
• Incorrect oil level
• Incorrect oil viscosity (low)
• Deteriorated oil
JUMPS OUT OF GEAR
Shift shaft
• Incorrect shift pedal position
• Improperly returned stopper lever
Shift forks
• Worn shift fork
Shift drum
• Incorrect axial play
• Worn shift drum groove
Transmission
• Worn gear dog
EAS28560
FAULTY CLUTCH
POOR MEDIUM-AND-HIGH-SPEED PERFORMANCE
Refer to "STARTING FAILURES" on page 9-1.
Engine
1. Air filter
• Clogged air filter element
• Faulty YCC-T and YCC-I
Fuel system
1. Fuel pump
• Faulty fuel pump
Clutch drags
1. Clutch
• Unevenly tensioned clutch spring
• Warped pressure plate
• Bent clutch plate
• Swollen friction plate
• Bent clutch pull rod
• Damaged clutch boss
• Burnt primary driven gear bushing
• Match marks not aligned
2. Engine oil
• Incorrect oil level
• Incorrect oil viscosity (high)
• Deteriorated oil
EAS28530
FAULTY GEAR SHIFTING
Shifting is difficult
Refer to “Clutch drags”.
EAS28540
SHIFT PEDAL DOES NOT MOVE
Shift shaft
• Improperly adjusted shift rod
• Bent shift shaft
Shift drum and shift forks
• Foreign object in a shift drum groove
• Seized shift fork
• Bent shift fork guide bar
EAS28600
OVERHEATING
Transmission
• Seized transmission gear
• Foreign object between transmission gears
• Improperly assembled transmission
Engine
1. Clogged coolant passages
• Cylinder head(s) and piston(s)
• Heavy carbon buildup
2. Engine oil
• Incorrect oil level
9-2
TROUBLESHOOTING
• Incorrect oil viscosity
• Inferior oil quality
• Oil or grease on the brake disc
• Oil or grease on the brake pad
• Incorrect brake fluid level
Cooling system
1. Coolant
• Low coolant level
2. Radiator
• Damaged or leaking radiator
• Faulty radiator cap
• Bent or damaged radiator fin
3. Water pump
• Damaged or faulty water pump
• Thermostat
• Thermostat stays closed
• Clogged or damaged oil cooler
• Damaged hose
• Improperly connected hose
• Damaged pipe
• Improperly connected pipe
EAS28650
FAULTY FRONT FORK LEGS
Leaking oil
• Bent, damaged or rusty inner tube
• Cracked or damaged outer tube
• Improperly installed oil seal
• Damaged oil seal lip
• Incorrect oil level (high)
• Loose damper rod assembly bolt
• Damaged damper rod assembly bolt copper
washer
• Cracked or damaged cap bolt O-ring
Malfunction
• Bent or damaged inner tube
• Bent or damaged outer tube
• Damaged fork spring
• Worn or damaged outer tube bushing
• Bent or damaged damper rod
• Incorrect oil viscosity
• Incorrect oil level
Fuel system
1. Throttle body(-ies)
• Faulty throttle body(-ies)
• Damaged or loose throttle body joint
2. Air filter
• Clogged air filter element
EAS28680
UNSTABLE HANDLING
1. Handlebar
• Bent or improperly installed right handlebar
• Bent or improperly installed left handlebar
2. Steering head components
• Improperly installed upper bracket
• Improperly installed lower bracket
(improperly tightened ring nut)
• Bent steering stem
• Damaged ball bearing or bearing race
3. Front fork leg(s)
• Uneven oil levels (both front fork legs)
• Unevenly tensioned fork spring (both front
fork legs)
• Broken fork spring
• Bent or damaged inner tube
• Bent or damaged outer tube
4. Swingarm
• Worn bearing or bushing
• Bent or damaged swingarm
5. Rear shock absorber assembly(-ies)
• Faulty rear shock absorber spring
• Leaking oil or gas
6. Tire(s)
• Uneven tire pressures (front and rear)
• Incorrect tire pressure
• Uneven tire wear
Chassis
1. Brake(s)
• Dragging brake
Electrical system
1. Spark plug(s)
• Incorrect spark plug gap
• Incorrect spark plug heat range
2. Ignition system
• Faulty ignitor unit
EAS28610
OVER COOLING
Cooling system
1. Thermostat
• Thermostat stays open
EAS28620
POOR BRAKING PERFORMANCE
• Worn brake pad
• Worn brake disc
• Air in hydraulic brake system
• Leaking brake fluid
• Faulty brake caliper kit
• Faulty brake caliper seal
• Loose union bolt
• Damaged brake hose
9-3
TROUBLESHOOTING
7.
•
•
•
•
•
8.
•
•
•
Wheel(s)
Incorrect wheel balance
Deformed cast wheel
Damaged wheel bearing
Bent or loose wheel axle
Excessive wheel runout
Frame
Bent frame
Damaged steering head pipe
Improperly installed bearing race
• Incorrect turn signal bulb
Turn signal remains lit
• Faulty turn signal relay
• Burnt-out turn signal bulb
Turn signal blinks quickly
• Incorrect turn signal bulb
• Faulty turn signal relay
• Burnt-out turn signal bulb
Horn does not sound
• Improperly adjusted horn
• Damaged or faulty horn
• Faulty main switch
• Faulty horn switch
• Faulty battery
• Blown, damaged or incorrect fuse
• Faulty wire harness
EAS28710
FAULTY LIGHTING OR SIGNALING SYSTEM
Headlight does not come on
• Wrong headlight bulb
• Too many electrical accessories
• Hard charging
• Incorrect connection
• Improperly grounded circuit
• Poor contacts (main or light switch)
• Burnt-out headlight bulb
Headlight bulb burnt out
• Wrong headlight bulb
• Faulty battery
• Faulty rectifier/regulator
• Improperly grounded circuit
• Faulty main switch
• Faulty light switch
• Headlight bulb life expired
Tail/brake light does not come on
• Too many electrical accessories
• Incorrect connection
Tail/brake light bulb burnt out
• Faulty battery
• Incorrectly adjusted rear brake light switch
Turn signal does not come on
• Faulty turn signal switch
• Faulty turn signal relay
• Burnt-out turn signal bulb
• Incorrect connection
• Damaged or faulty wire harness
• Improperly grounded circuit
• Faulty battery
• Blown, damaged or incorrect fuse
Turn signal blinks slowly
• Faulty turn signal relay
• Faulty main switch
• Faulty turn signal switch
9-4
EAS28740
WIRING DIAGRAM
YZFR1W/YZFR1WC
1. Main switch
2. AC magneto
3. Rectifier/regulator
4. Main fuse
5. Backup fuse
6. ETV fuse
7. Battery
8. Fuel injection system fuse
9. Starter relay
10. Starter motor
11. Starting circuit cut-off relay
12. Neutral switch
13. Sidestand switch
14. Fuel pump
15. Throttle position sensor (for
throttle valves)
16. Throttle position sensor (for
throttle cable pulley)
17. O2 sensor
18. ECU (engine control unit)
19. Ignition coil #1
20. Ignition coil #2
21. Ignition coil #3
22. Ignition coil #4
23. Spark plug
24. Injector #1
25. Injector #2
26. Injector #3
27. Injector #4
28. Air induction system solenoid
29. Intake funnel servo motor
30. Throttle servo motor
31. EXUP servo motor
32. Speed sensor
33. Intake air temperature sensor
34. Crankshaft position sensor
35. Coolant temperature sensor
36. Intake air pressure sensor
37. Atmospheric pressure sensor
38. Cylinder identification sensor
39. Lean angle sensor
40. Meter assembly
41. Fuel level warning light
42. Oil level warning light
43. Neutral indicator light
44. Tacho meter
45. Shift timing indicator light
46. Multi-function meter
47. Engine trouble warning light
48. Coolant temperature indicator
light
49. High beam indicator light
50. Left turn signal indicator light
51. Right turn signal indicator light
52. Meter light
53. Oil level switch
54. Right handlebar switch
55. Front brake light switch
56. Engine stop switch
57. Start switch
58. Turn signal relay
59. Left handlebar switch
60. Dimmer switch
61. Horn switch
62. Clutch switch
63. Turn signal switch
64. Horn
65. Front left turn signal light
66. Front right turn signal light
67. Rear left turn signal light
68. Rear right turn signal light
69. Headlight
70. Auxiliary light
71. Ground (cord head light)
72. License plate light
73. Rear brake light switch
74. Tail/brake light
75. Headlight relay (on/off)
76. Headlight relay (dimmer)
77. Ignition fuse
78. Signal fuse
79. Headlight fuse
80. Radiator fan motor relay
81. Right radiator fan motor fuse
82. Left radiator fan motor fuse
83. Right radiator fan motor
84. Left radiator fan motor
85. Ground
86. Battery negative lead
EAS28750
COLOR CODE
B
Br
Ch
Dg
G
Gy
L
Lg
O
P
R
Sb
W
Y
B/G
B/L
B/R
B/W
B/Y
Br/G
Br/L
Br/R
Br/W
Black
Brown
Chocolate
Dark green
Green
Gray
Blue
Light green
Orange
Pink
Red
Sky blue
White
Yellow
Black/Green
Black/Blue
Black/Red
Black/White
Black/Yellow
Brown/Green
Brown/Blue
Brown/Red
Brown/White
G/B
G/W
G/Y
Gy/G
Gy/R
L/B
L/R
L/W
L/Y
Lg/R
O/B
O/G
P/B
P/W
R/B
R/G
R/L
R/W
R/Y
Sb/W
W/B
W/L
W/R
W/Y
Y/R
Y/B
Y/G
Y/L
Green/Black
Green/White
Green/Yellow
Gray/Green
Gray/Red
Blue/Black
Blue/Red
Blue/White
Blue/Yellow
Light green/Red
Orange/Black
Orange/Green
Pink/Black
Pink/White
Red/Black
Red/Green
Red/Blue
Red/White
Red/Yellow
Sky blue/White
White/Black
White/Blue
White/Red
White/Yellow
Yellow/Red
Yellow/Black
Yellow/Green
Yellow/Blue
YAMAHA MOTOR CO., LTD.
2500 SHINGAI IWATA SHIZUOKA JAPAN
YZFR1W/YZFR1WC WIRING DIAGRAM
E
D
Dg L/R
L/R Dg
Ch B
B Ch
C
O/B L/B G/B R/B
REAR TURN SIGNAL
WIRE HARNESS LIGHT LEAD COUPLER
WIRE HARNESS
A
O/G R/B O Gy/R
Gy/R O R/BO/G
B/L
Gy/G L Br/R W/B
W/B Br/R L Gy/G
Y/L R/G L/W
L/W R/G Y/L
P/W G/W L R/L
R/W B/L
B/L R/W
Y/B W B/W
B/WB/R Y/B
B/L
R/L L G/WP/W
B
R/B G/B L/B O/B
SUB-WIRE HARNESS 2
WIRE HARNESS
R/Y Y Ch Dg G/W
G/W Dg Ch Y R/Y
R/W Y/B B Sb/W L/R
L/R Sb/W B Y/B Br
WIRE HARNESS HEADLIGHT
SUB-WIRE HARNESS
SUB-WIRE HARNESS 1
HEADLIGHT SUB-WIRE HARNESS
WIRE HARNESS
6
R
W W W
R/B C R/B
R/W
R
B
Y/R L/B B/W B/Y P/B O Gy/R O/G Gy/G
B/G P/W W W
Lg/R Lg L/W R/B G/B L/B O/B B
W
W
W
W
W
4
R
3
R
L
Br/R R/L B/W
W/B R/W
B Gy
19
R/B
L Gy/G Br/W
G/W W/R P Y/L B/L
B/L
O
O R/B
O C O
O
R
23
Gy/G
Gy/G
2
W
B/R B
Sb/W W/L B
R/W Y/G L/Y Lg
R Y/B W/Y Y/B G/Y
B
R
R/W L/W
R
Gy/G B/L
R
R
R
W
Gy/R
L
Gy/R C Gy/R
Gy/R R/B
Gy/R
23
R
7
B/L
8
R
B
R
O/G
B
L/W
B
Y/L
Sb/W
L/W
R/B
L/W
B
86
16
11
10
5
R
L/W
R/B L/W R/L
L/W L/Y R/W L/B L/Y Sb
B/L W L
B/L
W
B
B
B/Y Sb/W
Gy/G
B
22
Gy/G R/B
Gy/G
R/L
L
L/Y
L/B
L/Y
Sb
B/Y
L/W
R/W
L
L/Y
R/L
R/B
24
R/B D R/B
R/L
R/B
R/L
Sb
R/W
13
G/W B
B
B
L/B B
G/W
L/B
77
Br/L
Gy/G C Gy/G
23
R/G
L/B
L/Y
B/L
W
R/B
L/B L/Y
1
Br/L
23
L/W
85
L/Y L/B
O/G R/B
O/G
R/L D R/L
R
Br/L
O/G C O/G
R
R
Br/L
B
R
ON
21
R/B
R/W
R/W
9
OFF
20
R/B
17
15
B/L
R/L R/B
14
B/L W L
W
W
B
B
B
12
L
G/B
25
G/B D G/B
G/B
R/L
Y/B
B
B
B
R/L B
R/L G/B
B/Y
L/B
L/B
26
L/B D L/B
L/B
R/L
L/W
R/B
40
54
G/Y L/W R/W
R/W L/W G/Y
R/B B Br
Br B R/B
57
OFF
FREE
RUN
PUSH
Sb/W
56
A
41
55
R/L L/B
Sb/W
R/W
18
42
O/B
O/B D O/B
27
O/B
R/L
43
R/W A Br
Br
Sb/W
R/L O/B
B
Br
G/Y
Gy
B/L
44
58
R/Y
Br/W
Br
Br/W
L/Y
Br
OFF
R
LO
ON
N
Dg Y
Br/W R/Y
R/Y Br/W
Gy
Y/L
Y/L B Y/L
B/L
Br/W
Br/W
W/L
W/L
Sb/W
Sb/W
33
29
R
B
Lg
35
G/W
B/L
G/W D G/W
G/W
W
Lg/R
49
B/W
Y/R
B/W B B/W
50
B/L P/W L
Lg/R
Y/R
Y/R Lg/R
30
L D L
L
Ch
B/L
B/L D B/L
P/W
P/W D P/W
Lg
P/W
36
Y/B
51
Y A Y
81
Dg
B
Ch
Dg
Ch
37
52
A Ch
B/L P
64
Dg E Dg
Dg A Dg
L
B/G
B/G
B/R
B/R
L
L
P
P
B/L
Y/G
W/R
W/R
W/Y
Y/B
B/L
52
L/R E L/R
31
G/Y
L
B
72
69
69
B/Y
B
83
B B/G
B
B L/R
B
B
B
B
B B/G
B/G
70
70
65
66
Ch L
Dg L
B
B
67
68
Ch
B/L
W L/Y
L W/B
32
B/L
Dg
B
B
B
B
B
B
B
B
B L/R
B
B
B
B
B
B
B
B
B
B/Y
L/R Ch
L/R Dg
B
B
Ch
B
39
Dg
L
B
Y/G
L Y/G B/L
B E B
71
B A B
B
B
Y
B/L
B/G B/R
B/L
B
B
B/L C B/L
B/W
B/L
B/L
W/B C W/B
B/W
Dg
L B/Y Dg G/W Ch G L/W Sb/W
W L/Y
B
W/B
W/Y
38
L
L
Y/L B/R Y/B
B/L
L C L
L
R/G Br B/W
Ch
L/R
Dg
L/R
Ch
L/R
B/G
B/Y
B/Y
Ch E Ch
B/Y
B/G
Y L/R
B
L
B/Y
84
B
B
L
B
L
B
L/R
Y
B
B
B/Y
L/R
Y
L
L
L/R
Y
L
76
B
L W/R B/L
L W/Y
B/G
L
L
L/R A L/R
74
Sb/W W/L
Br/W B/L
G/W B/L
R/W
62
Y Dg
28
Br Br/R
34
48
Br B/Y B L/Y Ch
Ch L/Y B B/Y Br
Y
Y/B A Y/B
Br/G
Br/G
G/W A G/W G/W
W
HI
Y
B/G
82
Y/B B Y/B
L
R/Y
R/Y
Y/B
46
W
Y
Y/B
B/G
Br/G
G/Y
Br
B/R
53
63
61
60
75
G/Y
B/Y
59
B
R/Y
R/Y
R/Y
R
R/W
80
R
Br/G
R/W
L/W B L/W
R/G
W B B/R
47
73
B
L/W
R/G B R/G
Br/W
Br
R/Y A R/Y
Br/L
B/L
Br
79
R/W R/W C R/W
Br/R
Br/R R/W
B Gy
Br
78
Br/R C Br/R
W/B
B/L Gy
Br/L
Br/R
L
45
YZFR1W/YZFR1WC WIRING DIAGRAM
E
D
REAR TURN SIGNAL
WIRE HARNESS LIGHT LEAD COUPLER
WIRE HARNESS
C
SUB-WIRE HARNESS 2
WIRE HARNESS
B
SUB-WIRE HARNESS 1
A
WIRE HARNESS HEADLIGHT
SUB-WIRE HARNESS
HEADLIGHT SUB-WIRE HARNESS
WIRE HARNESS
6
19
2
4
3
23
20
17
23
7
8
21
9
23
86
ON
85
OFF
16
11
10
22
5
1
C
23
24
77
15
13
14
12
25
26
18
54
40
55
41
57
56
OFF
FREE
RUN
PUSH
27
42
43
44
45
28
78
34
58
79
46
29
Y/L
33
47
73
59
80
48
53
60
75
61
35
63
HI
OFF
R
LO
ON
N
49
L
30
50
62
51
36
37
52
31
64
82
52
81
38
74
76
84
83
72
69
69
70
70
32
65
66
67
68
39
71
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