general information

DR-Z400/E
99500-43022-01E
GROUP INDEX
FOREWORD
This manual contains an introductory description on
the SUZUKI DR-Z400/DR-Z400E and procedures for
its inspection, service, and overhaul of its main components.
Other information considered as generally known is not
included.
Read the GENERAL INFORMATION section to familiarize yourself with the motorcycle and its maintenance.
Use this section as well as other sections as a guide
for proper inspection and service.
This manual will help you know the motorcycle better
so that you can assure your customers of fast and reliable service.
This manual has been prepared on the basis
of the latest specifications at the time of publication. If modifications have been made since
then, differences may exist between the content of this manual and the actual motorcycle.
Illustrations in this manual are used to show
the basic principles of operation and work procedures. They may not represent the actual motorcycle exactly in detail.
This manual is written for persons who have
enough knowledge, skills and tools, including
special tools, for servicing SUZUKI motorcycles.
If you do not have the proper knowledge and
tools, ask your authorized SUZUKI motorcycle
dealer to help you.
Inexperienced mechanics or mechanics without the proper tools and equipment may not
be able to properly perform the services described in this manual. Improper repair may
result in injury to the mechanic and may render the motorcycle unsafe for the rider.
© COPYRICHT SUZUKI MOTOR CORPORATION 1999
GENERAL INFORMATION
1
PERIODIC MAINTENANCE
2
ENGINE
3
FUEL AND LUBRICATION
SYSTEM
4
COOLING SYSTEM
5
CHASSIS
6
ELECTRICAL SYSTEM
7
SERVICING INFORMATION
8
DR-Z400EY (E-24 MODEL)
9
DR-Z400/EK1 (’01-MODEL)
10
DR-Z400/EK2 (’02-MODEL)
11
HOW TO USE THIS MANUAL
TO LOCATE WHAT YOU ARE LOOKING
FOR:
1. The text of this manual is divided into sections.
2. The section titles are listed in the GROUP INDEX.
3. Holding the manual as shown at the right will allow
you to find the first page of the section easily.
4. The contents are listed on the first page of each section to help you find the item and page you need.
COMPONENT PARTS AND WORK TO BE DONE
Under the name of each system or unit there is an exploded view which provides work instructions and other
service information (e.g., tightening torque, lubricating points, and locking agent points).
Example: Front wheel
1
2
3
4
5
6
7
8
9
0
Front axle
Odometer gearbox
Bearing (R)
Front wheel
Spacer
Bearing (L)
Dust seal
Brake disc
Spacer
Washer
A Front axle nut
B Brake disc mounting bolt
ITEM
A
B
N·m
42
10
kgf-m
4.2
1.0
lb-ft
30.5
7.0
SYMBOL
Listed in the table below are the symbols indicating instructions and other information necessary for servicing. The meaning of each symbol is also included in the table.
SYMBOL
DEFINITION
SYMBOL
DEFINITION
Torque control required.
Data beside it indicates specified torque.
Apply THREAD LOCK “1342”.
99000-32050
Indicates service data.
Apply or use brake fluid.
Apply oil. Use engine oil unless otherwise specified.
Measure in voltage range.
Apply molybdenum oil solution.
(mixture of engine oil and SUZUKI
MOLY PASTE in a ratio of 1 : 1)
Measure in resistance range.
Apply SUZUKI SUPER GREASE “A”.
99000-25030 (For USA)
99000-25010 (For the other countries)
Measure in current range.
Apply SUZUKI SILICONE GREASE.
99000-25100
Measure in diode test range.
Apply SUZUKI MOLY PASTE.
99000-25140
Measure in continuity test range.
Apply SUZUKI BOND “1207B”.
99104-31140 (For USA)
99000-31140 (For the other countries)
Use special tool.
Apply SUZUKI BOND “1215”.
99000-31110 (Except USA)
Use engine coolant.
99000-99032-11X (Except USA)
Apply THREAD LOCK SUPER “1303”.
99000-32030
Use fork oil.
99000-99001-SS5
Apply THREAD LOCK SUPER “1322”.
99000-32110 (Except USA)
Use rear shock absorber oil.
99000-99001-S25
GENERAL INFORMATION
1-1
GENERAL INFORMATION
1
CONTENTS
WARNING/CAUTION/NOTE ........................................................................... 1- 2
GENERAL PRECAUTIONS ............................................................................ 1- 2
SUZUKI DR-Z400Y/DR-Z400EY (2000-MODEL) ........................................... 1- 4
SERIAL NUMBER LOCATION ....................................................................... 1- 4
FUEL, OIL, AND ENGINE COOLANT RECOMMENDATIONS ...................... 1- 4
FUEL ........................................................................................................... 1- 4
ENGINE OIL................................................................................................ 1- 5
BRAKE FLUID ............................................................................................ 1- 5
FRONT FORK OIL ...................................................................................... 1- 5
REAR SHOCK ABSORBER OIL ................................................................ 1- 5
ENGINE COOLANT .................................................................................... 1- 5
BREAK-IN PROCEDURES ............................................................................. 1- 6
INFORMATION LABELS ................................................................................ 1- 7
SPECIFICATIONS ........................................................................................... 1- 8
COUNTRY AND AREA CODES ..................................................................... 1-10
1-2
GENERAL INFORMATION
WARNING/CAUTION/NOTE
Please read this manual and follow its instructions carefully. To emphasize special information, the symbol
and the words WARNING, CAUTION and NOTE have special meanings. Pay special attention to the messages highlighted by these signal words.
Indicates a potential hazard that could result in death or injury.
Indicates a potential hazard that could result in motorcycle damage.
NOTE:
Indicates special information to make maintenance easier or instructions clearer.
Please note, however, that the warnings and cautions contained in this manual cannot possibly cover all
potential hazards relating to the servicing, or lack of servicing, of the motorcycle. In addition to the WARNINGS and CAUTIONS stated, you must use good judgement and basic mechanical safety principles. If you
are unsure about how to perform a particular service operation, ask a more experienced mechanic for
advice.
GENERAL PRECAUTIONS
Proper service and repair procedures are important for the safety of the service mechanic
and the safety and reliability of the motorcycle.
When two or more persons work together, pay attention to the safety of each other.
When it is necessary to run the engine indoors, make sure that exhaust gas is forced outdoors.
When working with toxic or flammable materials, make sure that the area you work in is well
ventilated and that you follow all of the manufacturer’s instructions.
Never use gasoline as a cleaning solvent.
To avoid getting burned, do not touch the engine, engine oil, radiator, and exhaust system
until they have cooled.
After servicing the fuel, oil, engine coolant, exhaust or brake systems, check all of the lines,
and fittings related to the system for leaks.
GENERAL INFORMATION
1-3
If parts replacement is necessary, replace the parts with SUZUKI Genuine Parts or their equivalent.
When removing parts that are to be reused, keep them arranged in an orderly manner so that
they may be reinstalled in the proper order.
Be sure to use special tools when instructed.
Make sure that all parts used in reassembly are clean. Lubricate them when specified.
Use the specified lubricants, bonds, or sealants.
When removing the battery, disconnect the - battery lead wire first, then the + battery lead
wire.
When reconnecting the battery, connect the + battery lead wire first, then the - battery lead
wire. Finally, cover the + battery terminal with the terminal cover.
When performing service to electrical parts, disconnect the - battery lead wire, unless the
service procedure requires the battery power.
When tightening cylinder head and crankcase nuts and bolts, tighten the larger sizes first.
Always tighten the nuts and bolts from the inside working out, diagonally and to the specified
torque.
Whenever you remove oil seals, gaskets, packing, O-rings, self-locking nuts, locking washers, cotter pins, circlips, and other specified parts, be sure to replace them with new ones.
Also, before installing these new parts, be sure to remove any left over material from the
mating surfaces.
Never reuse a circlip. When installing a new circlip, take care not to expand the end gap larger
than required to slip the circlip over the shaft. After installing a circlip, always ensure it is
completely seated in its groove and securely fitted.
Use a torque wrench to tighten fasteners to the specified torque. Wipe off grease and oil if a
thread is smeared with them.
After reassembling, check parts for tightness and proper operation.
To protect the environment, do not unlawfully dispose of used motor oil, engine coolant, all
other fluids, batteries, and tires.
To protect the earth’s natural resources, properly dispose of used motorcycles and parts.
1-4
GENERAL INFORMATION
SUZUKI DR-Z400Y/DR-Z400EY (2000-MODEL)
RIGHT SIDE
LEFT SIDE
* Difference between photographs and the actual motorcycle depends on the markets.
SERIAL NUMBER LOCATION
The frame serial number or V.I.N. (Vehicle Identification Number) 1 is stamped on the right side of the
steering head pipe. The engine serial number 2 is located on the right side of the crankcase. These numbers are required especially for registering the machine and ordering spare parts.
1
2
FUEL, OIL, AND ENGINE COOLANT RECOMMENDATIONS
FUEL (FOR USA AND CANADA)
Use only unleaded gasoline of at least 90 pump octane ( R + M ). Gasoline containing MTBE (Methyl Tertiary
2
Butyl Ether), less than 10% ethanol, or less than 5% methanol with appropriate cosolvents and corrosion
inhibitor is permissible.
FUEL (FOR THE OTHER COUNTRIES)
Gasoline used should be graded 95 octane (Research Method) or higher. Unleaded gasoline is recommended.
GENERAL INFORMATION
1-5
ENGINE OIL (FOR USA)
SUZUKI recommends the use of SUZUKI PERFORMANCE 4
MOTOR OIL or an oil which is rated SF or SG under the API
(American Petroleum Institute) service classification. The recommended viscosity is SAE 10W/40. If an SAE 10W/40 oil is
not available, select an alternative according to the right chart.
ENGINE OIL (FOR THE OTHER COUNTRIES)
Use a premium quality 4-stroke motor oil to ensure longer service life of your motorcycle. Use only oils
which are rated SF or SG under the API service classification. The recommended viscosity is SAE 10W-40.
If an SAE 10W-40 motor oil is not available, select an alternative according to the following chart.
BRAKE FLUID
Specification and classification: DOT 4
This motorcycle uses a glycol-based brake fluid. Do not use or mix other types of brake
fluid such as silicone-based and petroleum-based fluids for refilling the system, otherwise
serious damage will result to the brake system.
Do not use any brake fluid taken from old, used, or unsealed containers.
Do not reuse brake fluid left over from the last servicing or which has been stored for a
long period of time.
FRONT FORK OIL
Use SUZUKI FORK OIL SS-05 or an equivalent fork oil.
REAR SHOCK ABSORBER OIL
Use SUZUKI REAR SUSPENSION OIL SS-25 or an equivalent suspension oil.
ENGINE COOLANT
Since antifreeze also has corrosion- and rust-inhibiting properties, always use engine coolant containing
antifreeze, even if the atmospheric temperature does not go below the freezing point.
Use an antifreeze designed for aluminum radiators. SUZUKI recommends the use of SUZUKI COOLANT
antifreeze. If this is not available, use an equivalent antifreeze for aluminum radiators.
Mix only distilled water with the antifreeze. Other types of water can corrode and clog the aluminum radiator.
Mix distilled water and antifreeze at a ratio of 50:50 – 40:60.
For more information, refer to page 5-4 in the Cooling System section.
The percentage of antifreeze in the coolant should be between 50 to 60%. If the percentage of
antifreeze is above or below this range the coolant’s frost protection and rust-inhibiting capabilities will be reduced. Always keep the antifreeze content above 50% even if the atmospheric temperature does not go below the freezing point.
1-6
GENERAL INFORMATION
BREAK-IN PROCEDURES
During manufacturing only the best possible materials are used and all machined parts are finished to a
very high standard. It is still necessary to allow the moving parts to “BREAK-IN” before subjecting the engine
to maximum stresses. The future performance and reliability of the engine depends on the care and restraint
exercised during its early life. Refer to the following break-in engine speed recommendations.
Keep to these brake-in throttle position.
Break-in throttle position
Initial 10 hours: Less than 1/2 throttle
Up to 15 hours: Less than 3/4 throttle
GENERAL INFORMATION
INFORMATION LABELS
NO
1
2
3
4
5
6
7
8
LABEL or PLATE NAME
Engine starting label (DR-Z400E)
Noise label
ICES Canada label
Manual notice label
Warning safety label
Frame serial number plate
Compliance label
Fuel information label
E-01
APPLIED SPECIFICATION
E-03
-
-
-
-
E-28
-
67
8 4 5
2
3
1
1-7
1-8
GENERAL INFORMATION
SPECIFICATIONS
DIMENSIONS AND DRY MASS
Overall length .................................................. 2 235 mm (88.0 in)
Overall width .................................................... 825 mm (32.5 in)
Overall height .................................................. 1 245 mm (49.0 in)
Wheelbase ....................................................... 1 475 mm (58.1 in)
Ground clearance ............................................ 325 mm (12.8 in)
Seat height ....................................................... 945 mm (37.2 in)
Dry mass .......................................................... 113 kg (249 lbs) ..... DR-Z400
119 kg (262 lbs) ..... DR-Z400E
ENGINE
Type.................................................................. Four-stroke, liquid-cooled, DOHC
Number of cylinders ......................................... 1
Bore ................................................................. 90.0 mm (3.543 in)
Stroke ............................................................... 62.6 mm (2.465 in)
Piston displacement ........................................ 398 cm3 (24.3 cu. in)
Compression ratio ............................................ 12.2 : 1
Carburetor ........................................................ KEIHIN FCR39
Air cleaner ........................................................ Polyurethane foam element
Starter system.................................................. Primary kick .............. DR-Z400
Electric ...................... DR-Z400E
Lubrication system ........................................... Dry sump
TRANSMISSION
Clutch ............................................................... Wet multi-plate type
Transmission .................................................... 5-speed constant mesh
Gearshift pattern .............................................. 1-down, 4-up
Primary reduction ratio .................................... 2.960 (74/25)
Final reduction ratio ......................................... 3.357 (47/14)
Gear ratios, Low ............................................... 2.285 (32/14)
2nd ................................................ 1.733 (26/15)
3nd ................................................ 1.375 (22/16)
4th ................................................. 1.090 (24/22)
Top ................................................ 0.863 (19/22)
Drive chain ....................................................... RK520KZO, 112 links
GENERAL INFORMATION
1-9
CHASSIS
Front suspension ............................................. Telescopic, coil spring, oil damped, rebound damping force
18-way adjustable, compression damping force 14-way adjustable
Rear suspension .............................................. Link type, coil spring, oil damped, spring preload fully adjustable, rebound damping force 21-way adjustable, compression damping force 26-way adjustable
Front suspension stroke .................................. 288 mm (11.3 in)
Rear wheel travel ............................................. 295 mm (11.6 in)
Caster .............................................................. 27° 20´
Trail ................................................................... 112 mm (4.41 in)
Steering angle ................................................. 45° (right & left)
Turning radius .................................................. 2.2 m (7.2 ft)
Front brake ....................................................... Disc brake
Rear brake ....................................................... Disc brake
Front tire size ................................................... 80/100-21 51M
Rear tire size .................................................... 110/100-18 64M
ELECTRICAL
Ignition type ..................................................... Electronic ignition (CDI)
Ignition timing ................................................... 7° BTDC at 1 800 r/min
Spark plug ........................................................ NGK: CR8E
DENSO: U24ESR-N
Generator ......................................................... Three-phase A.C. generator
Main fuse ......................................................... 10 A ....... DR-Z400E
Headlight .......................................................... 12 V 55 W
Taillight ............................................................. LED
CAPACITIES
Fuel tank, including reserve ............................ 10.0 L (2.6 US gal, 2.2 Imp gal)
reserve ............................................ 2.3 L (0.6 US gal, 0.5 Imp gal)
Engine oil, oil change ...................................... 1 700 ml (1.8 US qt, 1.5 Imp qt)
oil and filter change ....................... 1 800 ml (1.9 US qt, 1.6 Imp qt)
engine overhaul ............................. 1 900 ml (2.0 US qt, 1.7 Imp qt)
Front fork oil ..................................................... 720 ml (24.3 US oz, 25.4 Imp oz)
Engine coolant ................................................. 1 250 ml (1.3 US qt, 1.1 Imp qt)
NOTE:
These specifications are subject to change without notice.
1-10
GENERAL INFORMATION
COUNTRY AND AREA CODES
The following are codes and their applicable country or area.
CODE
COUNTRY OR AREA
E-01
General
E-03
USA
E-28
Canada
PERIODIC MAINTENANCE
2-1
PERIODIC MAINTENANCE
CONTENTS
PERIODIC MAINTENANCE SCHEDULE ......................................................
PERIODIC MAINTENANCE CHART .........................................................
MAINTENANCE AND TUNE-UP PROCEDURES..........................................
AIR CLEANER ...........................................................................................
EXHAUST PIPE NUT AND BOLT AND MUFFLER NUT AND BOLTS .....
TAPPET CLEARANCE ..............................................................................
SPARK PLUG ............................................................................................
SPARK ARRESTER ..................................................................................
FUEL LINE .................................................................................................
DECOMPRESSION LEVER (DR-Z400) ....................................................
ENGINE OIL AND OIL FILTER ..................................................................
ENGINE OIL HOSES .................................................................................
THROTTLE CABLE PLAY .........................................................................
ENGINE IDLE SPEED ...............................................................................
ENGINE COOLANT ...................................................................................
RADIATOR HOSES ...................................................................................
CLUTCH.....................................................................................................
DRIVE CHAIN ............................................................................................
BRAKES ....................................................................................................
BRAKE FLUID ...........................................................................................
BRAKE HOSES .........................................................................................
TIRES .........................................................................................................
SPOKE NIPPLES ......................................................................................
STEERING .................................................................................................
FRONT FORK ............................................................................................
REAR SUSPENSION.................................................................................
CHASSIS NUTS AND BOLTS ...................................................................
GENERAL LUBRICATION ........................................................................
COMPRESSION PRESSURE CHECK (DR-Z400E) ......................................
COMPRESSION TEST PROCEDURE .......................................................
OIL PRESSURE CHECK ...............................................................................
OIL PRESSURE TEST PROCEDURE .......................................................
2
2- 2
2- 2
2- 3
2- 3
2- 4
2- 5
2- 9
2-10
2-10
2-10
2-11
2-12
2-13
2-14
2-14
2-15
2-16
2-16
2-18
2-19
2-21
2-21
2-22
2-23
2-23
2-23
2-24
2-26
2-27
2-27
2-28
2-28
2-2
PERIODIC MAINTENANCE
PERIODIC MAINTENANCE SCHEDULE
The chart below lists the recommended intervals for all the required periodic service work necessary to
keep the motorcycle operating at peak performance and economy. Maintenance intervals are expressed in
terms of hours.
NOTE:
More frequent servicing may be performed on motorcycles that are used under severe conditions.
PERIODIC MAINTENANCE CHART
Interval
Initial
Every
Every
Item
5 hours
30 hours
60 hours
Inspect each time the motorcycle is ridden and clean
Air cleaner
as necessary.
Exhaust pipe nut and bolt and muffler nut and bolts
T
T
T
Tappet clearance
I
–
I
Spark plug
–
I
R
Spark arrester
–
C
C
I
I
I
Fuel line
Replace every four years.
Decompression lever (DR-Z400)
I
I
I
Engine oil and oil filter
R
–
R
Engine oil hoses
I
I
I
Carburetor
I
I
I
Engine coolant
Replace every two years.
Radiator hose
I
I
I
Clutch
I
I
I
Clean, lubricate and inspect each time the
Drive chain
motorcycle is ridden.
Brakes
I
I
I
I
I
I
Brakes fluid
Replace every two years.
I
I
I
Brake hoses
Replace every four years.
Check the tire pressure and the tire for
Tires
damage each time the motorcycle is ridden.
Spoke nipples
Inspect each time the motorcycle is ridden.
Steering
I
–
I
Front fork
I
–
I
Rear suspension
I
–
I
Chassis nuts and bolts
T
T
T
I
R
T
C
= Inspect and adjust, clean, lubricate, or replace as necessary.
= Replace
= Tighten
= Clean
PERIODIC MAINTENANCE
MAINTENANCE AND TUNE-UP
PROCEDURES
This section describes the servicing procedures for each item
mentioned in the Periodic Maintenance chart.
AIR CLEANER
Inspect each time the motorcycle is ridden and clean
as necessary.
If the air cleaner is clogged with dust, intake resistance will be
increased, with a resultant decrease in power output and an increase in fuel consumption. Check and clean the air cleaner element in the following manner.
Remove the left frame cover. (
6-2)
Remove the air cleaner element.
Separate the polyurethane foam element 1 and element
frame 2.
Fill a wash pan of a proper size with a nonflammable cleaning
solvent. Immerse the air cleaner element in the cleaning solvent and wash it.
Press the air cleaner element between the palms of both hands
to remove the excess solvent: do not twist or wring the element or it will tear.
Immerse the element in motor oil, and then squeeze out the
excess oil leaving the element slightly wet.
2
1
A Nonflammable cleaning solvent
B Motor oil SAE #30 or SAE 10W-40
Inspect the air cleaner element for tears. A torn element must be replaced.
The surest way to accelerate engine wear is to operate the engine without the element or with one that
is torn. Make sure that the air cleaner element is in
good condition at all times. Life of the engine depends largely on this component!
Remove the drain plug 3 to allow any water to drain out.
3
2-3
2-4
PERIODIC MAINTENANCE
EXHAUST PIPE NUT AND BOLT AND
MUFFLER NUT AND BOLTS
1
Tighten initially at five hours of operation and every
30 hours thereafter.
2
Remove the right frame cover. (
6-2)
Tighten the exhaust pipe nut 1, exhaust pipe bolt 2, muffler
connection bolt 3, muffler mounting bolt 4 and muffler mounting nut 5 to the specified torque.
Exhaust pipe nut and bolt: 23 N·m (2.3 kgf-m, 16.5 lb-ft)
Muffler connection bolt: 20 N·m (2.0 kgf-m, 14.5 lb-ft)
Muffler mounting nut and bolt:
23 N·m (2.3 kgf-m, 16.5 lb-ft)
4
3
5
PERIODIC MAINTENANCE
TAPPET CLEARANCE
Inspect initially at five hours of operation and every
60 hours thereafter.
INSPECTION
Remove the fuel tank. (
4-2)
Disconnect the spark plug cap and remove the spark plug.
(
2-9)
Remove the cylinder head cover.
The tappet clearance specification is different for both intake and
exhaust valves.
Tappet clearance adjustment must be checked and adjusted: 1)
at the time of periodic inspection, 2) when the valve mechanism
is serviced, and 3) when the camshafts are removed for servicing.
NOTE:
The piston must be at top dead center (TDC) on the compression stroke in order to check or adjust the tappet clearance.
The tappet clearance should only be checked when the engine is cold.
Remove the generator cover cap 1 and valve timing inspection plug 2.
Rotate the crankshaft with a box wrench to set the piston at
TDC on the compression stroke. (Rotate the crankshaft until
the “T” line on the generator rotor is aligned with the center of
the hole in the generator cover.)
Insert a thickness gauge between the tappet and the cam. If
the clearance is out of specification, adjust it to specification
as follows.
09900-20803: Thickness gauge
Tappet clearance (when cold)
IN: 0.10 – 0.20 mm (0.0039 – 0.0079 in)
EX: 0.20 – 0.30 mm (0.0079 – 0.0118 in)
2
1
2-5
2-6
PERIODIC MAINTENANCE
ADJUSTMENT
The clearance is adjusted by replacing the existing tappet shim
with a thicker or thinner shim.
Remove the intake or exhaust camshafts. (
3-12)
Remove the tappet and shim by hand or with a magnet. (
3-22)
Check the numbers printed on the tappet shim. These numbers indicate the thickness of the tappet shim, as illustrated.
Select a replacement tappet shim that will provide the proper
clearance. Tappet shims are available in 25 sizes, ranging from
2.30 to 3.50 mm (0.09 to 0.14 in) in increments of 0.05 mm
(0.002 in). Install the selected shim 1 at the valve stem end,
with the numbers facing towards the tappet. Be sure to measure the shim with a micrometer to ensure that it is of the
proper size.
Refer to the tappet shim selection table for details.
NOTE:
Be sure to apply molybdenum oil solution to the top and bottom faces of the tappet shim.
When installing the tappet shim, make sure that the side with
the numbers face towards the tappet.
Install the camshafts as specified. (
3-61 to 3-63)
After replacing the tappet shim and camshafts, rotate the
crankshaft so that the tappet is depressed fully (this will
squeeze out any oil trapped between the tappet shim and the
tappet that could cause an incorrect measurement). After rotating the crankshaft, check the tappet clearance again to make
sure that it is within specification.
When installing the cylinder head cover, apply SUZUKI BOND
“1207B” to the cam end caps of the cylinder head cover gasket.
For USA
99104-31140: SUZUKI BOND “1207B”
For the other countries
99000-31140: SUZUKI BOND “1207B”
Tighten the cylinder head cover bolts to specification in two
stages.
Cylinder head cover bolt
Initial: 10 N·m (1.0 kgf-m, 7.0 lb-ft)
Final: 14 N·m (1.4 kgf-m, 10.0 lb-ft)
MEASURED
TAPPET
CLEARANCE
(mm)
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.50
0.86–0.90
0.91–0.95
0.96–1.00
1.01–1.05
1.06–1.10
1.11–1.15
1.16–1.20
1.21–1.25
1.26–1.30
1.31–1.35
1.36–1.40
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.50
3.50
3.45
3.40
3.35
3.30
3.50
3.50
3.45
3.40
3.50
3.50
3.45
3.40
3.35
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.05
3.00
3.10
310
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.10
3.05
3.15
315
3.50
3.50
3.45
3.40
3.35
3.30
3.15
3.10
3.20
320
3.50
3.50
3.45
3.40
3.35
3.20
3.15
3.25
325
3.50
3.50
3.45
3.40
3.25
3.20
3.30
330
3.50
3.50
3.45
3.30
3.25
3.35
335
3.50
3.50
3.35
3.30
3.40
340
3.50
3.40
3.35
3.45
345
3.45
3.40
3.50
350
I. Measure tappet clearance when the engine is cold.
II. Measure present shim size.
III. Match clearance in vertical column with present shim size in horizontal
column.
Example:
Tappet clearance is
0.23 mm
Present shim size
2.70 mm
Shim size to be used
2.80 mm
How to use this chart:
3.50
3.50
3.45
3.40
3.35
3.35
3.30
3.30
3.25
3.20
0.81–0.85
3.00
2.95
3.10
3.05
3.20
3.15
3.30
3.25
3.25
3.20
3.15
3.10
2.95
3.05
3.00
3.15
3.10
3.25
3.20
3.20
3.15
3.10
3.05
2.90
3.00
2.95
3.10
3.05
3.20
3.15
3.15
3.10
3.05
3.00
0.76–0.80
2.95
2.90
3.05
3.00
3.15
3.10
3.10
3.05
3.00
2.95
0.71–0.75
2.90
2.85
3.00
2.95
3.10
3.05
3.05
3.00
2.95
2.90
2.85
2.95
2.90
3.05
3.00
3.00
2.95
2.90
2.85
2.80
2.90
2.85
3.00
2.95
2.95
2.90
2.85
2.80
0.66–0.70
2.85
2.80
2.95
2.90
2.90
2.85
2.80
2.75
0.61–0.65
2.80
2.75
2.90
2.85
2.85
2.80
2.75
2.70
2.75
2.85
2.80
2.80
2.75
2.70
2.65
2.70
2.80
2.75
2.75
2.70
2.65
2.60
0.56–0.60
2.75
2.70
2.70
2.65
2.60
2.55
0.51–0.55
2.70
2.65
2.65
2.60
2.55
2.50
2.65
2.60
2.55
2.50
2.45
2.60
3.00
2.95
3.05
305
0.46–0.50
2.95
2.90
3.00
300
0.41–0.45
2.90
2.85
2.95
295
2.55
2.85
2.80
2.90
290
2.50
2.80
2.75
2.85
285
0.36–0.40
2.75
2.70
2.80
280
0.31–0.35
2.70
2.65
2.75
275
3.15
2.65
2.60
2.70
270
2.45
2.60
2.55
2.65
265
0.26–0.30
2.55
2.50
2.60
260
SPECIFIED CLEARANCE/NO ADJUSTMENT REQUIRED
2.50
2.45
2.55
255
2.40
2.45
2.40
2.50
250
0.21–0.25
2.40
2.35
2.45
245
TAPPET SHIM SET NO.(12800-41810)
0.10–0.20
2.35
2.40
240
2.30
2.30
2.35
235
0.05–0.09
2.30
230
0.00–0.04
PRESENT
SHIM SIZE
(mm)
SUFFIX
NO.
TAPPET SHIM SELECTION TABLE (INTAKE)
TAPPET SHIM NO. (12892-41C00-XXX)
PERIODIC MAINTENANCE
2-7
INTAKE SIDE
MEASURED
TAPPET
CLEARANCE
(mm)
2.85
2.90
2.95
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.50
0.81–0.85
0.86–0.90
0.91–0.95
0.96–1.00
1.01–1.05
1.06–1.10
1.11–1.15
1.16–1.20
1.21–1.25
1.26–1.30
1.31–1.35
1.36–1.40
1.41–1.45
1.46–1.50
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2.95
2.90
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2.95
2.90
2.85
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2.95
2.90
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2.95
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2.95
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.50
3.50
3.45
3.40
3.35
3.30
3.50
3.50
3.45
3.40
3.35
3.50
3.50
3.45
3.40
3.50
3.50
3.45
3.50
3.50
3.50
I. Measure tappet clearance when the engine is cold.
II. Measure present shim size.
III. Match clearance in vertical column with present shim size in horizontal
column.
Example:
Tappet clearance is
0.38 mm
Present shim size
2.90 mm
Shim size to be used
3.05 mm
How to use this chart:
3.50
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.20
3.15
3.20
0.76–0.80
2.85
2.80
2.95
2.90
3.05
3.00
3.15
3.10
3.10
2.80
2.90
2.85
2.95
3.00
3.10
3.05
3.05
2.75
2.85
2.80
2.95
2.90
3.05
3.00
3.00
0.71–0.75
2.80
2.75
2.90
2.85
3.00
2.95
2.95
0.66–0.70
2.75
2.70
2.85
2.80
2.95
2.90
2.90
2.70
2.75
2.80
2.90
2.85
2.85
2.65
2.75
2.70
2.85
2.80
2.80
0.61–0.65
2.70
2.65
2.80
2.75
2.75
0.56–0.60
2.65
2.60
2.75
2.70
2.70
2.60
2.70
2.65
2.65
2.55
2.65
2.60
2.60
0.51–0.55
2.60
2.55
2.55
0.46–0.50
2.50
2.55
2.50
2.50
2.45
3.20
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2.95
2.90
2.85
2.80
2.75
2.70
2.65
2.45
2.60
0.41–0.45
2.55
0.36–0.40
2.50
3.15
2.45
3.40
3.35
3.30
3.50
350
3.35
3.30
3.25
3.45
345
3.30
3.25
3.20
3.40
340
3.25
3.20
3.15
3.35
335
3.20
3.15
3.10
3.30
330
3.15
3.10
3.05
3.25
325
3.10
3.05
3.00
3.20
320
3.05
3.00
2.95
3.15
315
3.00
2.95
2.90
3.10
310
2.95
2.90
2.85
3.05
305
2.90
2.85
2.80
3.00
300
2.85
2.80
2.75
2.95
295
2.80
2.75
2.70
2.90
290
2.75
2.70
2.65
2.85
285
2.70
2.65
2.60
2.80
280
2.65
2.60
2.55
2.75
275
2.60
2.55
2.50
2.70
270
2.40
2.40
2.55
2.50
2.45
2.65
265
0.31–0.35
2.35
2.50
2.45
2.40
2.60
260
SPECIFIED CLEARANCE/NO ADJUSTMENT REQUIRED
2.30
2.45
2.40
2.35
2.55
255
TAPPET SHIM SET NO.(12800-41810)
0.20–0.30
0.15–0.19
2.40
2.35
2.30
0.10–0.14
2.50
250
2.35
2.45
245
2.30
2.40
240
2.30
2.35
235
0.05–0.09
2.30
230
0.00–0.04
PRESENT
SHIM SIZE
(mm)
SUFFIX
NO.
TAPPET SHIM SELECTION TABLE (EXHAUST)
TAPPET SHIM NO. (12892-41C00-XXX)
2-8
PERIODIC MAINTENANCE
EXHAUST SIDE
PERIODIC MAINTENANCE
SPARK PLUG
Inspect every 30 hours of operation.
Replace every 60 hours of operation.
Remove the fuel tank. (
4-2)
Disconnect the spark plug cap and remove the spark plug.
NGK
DENSO
Cold type
CR9E
CR10E
U27ESR-N
U31ESR-N
Standard
Hot type
CR8E
CR7E
U24ESR-N
U22ESR-N
CARBON DEPOSITS
Check to see if there are carbon deposits on the spark plug. If
carbon is deposited, remove it using a spark plug cleaner machine or carefully use a tool with a pointed end.
SPARK PLUG GAP
Measure the spark plug gap using a thickness gauge. If the spark
plug gap is out of specification, adjust the gap.
Spark plug gap
Standard: 0.7 – 0.8 mm (0.028 – 0.031 in)
09900-20803: Thickness gauge
ELECTRODE
Check the condition of the electrode.
If the electrode is extremely worn or burnt, replace the spark
plug with a new one.
Also, replace the spark plug if it has a broken insulator, damaged threads, etc.
Check the thread size and reach when replacing the
spark plug. If the reach is too short, carbon will be deposited on the screw portion of the spark plug hole
and engine damage may result.
SPARK PLUG INSTALLATION
To avoid damaging the cylinder head threads; first, finger tighten the spark plug, and then tighten it to the
specified torque using the spark plug wrench.
Insert the spark plug and finger tighten it to the cylinder head,
and then tighten it to the specified torque.
Spark plug: 11 N·m (1.1 kgf-m, 8.0 lb-ft)
2-9
2-10
PERIODIC MAINTENANCE
SPARK ARRESTER
Clean every 30 hours of operation.
Remove the spark arrester.
Remove the carbon deposits from spark arrester and muffler.
FUEL LINE
Inspect initially at five hours of operation and every
30 hours thereafter.
Replace every four years of operation.
Inspect the fuel hose for damage and fuel leakage. If any damages are found, replace the fuel hoses with new ones.
DECOMPRESSION LEVER (DR-Z400)
Inspect initially at five hours of operation and every
60 hours, thereafter.
Incorrect adjustment of the lever clearance may result in starting
difficulties or engine damage. Check the lever clearance and if
necessary, adjust as follows:
Adjust the tappet clearance. (
2-5 to 2-8)
Loosen the locknuts 1.
Turn the adjuster 2 to provide the specified lever clearance A.
Tighten the locknuts 1.
Decompression cable play A:
0 – 0.1 mm (0 – 0.004 in)
2
1
A
PERIODIC MAINTENANCE
ENGINE OIL AND OIL FILTER
Replace initially at five hours of operation and every
60 hours thereafter.
1
2
The oil should be changed while the engine is warm. Oil filter
replacement at the above intervals, should be done together with
the engine oil change.
ENGINE OIL REPLACEMENT
Place an oil pan below the engine, and then drain the oil by
removing the engine oil drain plugs (1, 2) and engine oil
filler cap 3.
Tighten the engine oil drain plugs (1, 2) to the specified
torque, and then pour the new oil through the oil filler hole.
When performing an oil change (without oil filter replacement),
the engine will hold about 1.7 L (1.8 US qt, 1.5 Imp qt) of oil.
Use an engine oil that meets API service classifications SF or
SG and that has a viscosity rating of SAE 10W-40.
3
Engine oil drain plug
(on the crankcase) 1: 21 N·m (2.1 kgf-m, 15.0 lb-ft)
(on the frame) 2:
18 N·m (1.8 kgf-m, 13.0 lb-ft)
4
When installing the engine oil drain plug 2 with gasket, face the taper of gasket to drain plug as shown.
Make sure that the engine is cooled.
Place the motorcycle on level ground and hold it vertically.
Install the oil filler cap 3.
Start the engine and allow it to run for three minutes at idling
speed.
Turn off the engine and wait about three minutes, and then
check the oil level on the dipstick 4. The oil level should be
between the “L” (low) and “F” (full) level lines. If the oil level is
lower than the “L” level line, add oil to the “F” level line.
NOTE:
Engine oil expands and oil level increase when the engine oil is
hot.
2-11
2-12
PERIODIC MAINTENANCE
OIL FILTER REPLACEMENT
Drain the engine oil as described in the engine oil replacement procedure.
Remove the oil filter cap 1 and oil filter 2.
Replace the oil filter with a new one.
1
NOTE:
Before replacing the oil filter cap, make sure that the spring 3
and a new O-ring 4 are installed correctly.
Make sure that the O-ring 5 behind the filter is in the correct
position.
2
3 4
5
Replace the oil filter cap and tighten the nut securely.
Add new engine oil and check the oil level as described in the
engine oil replacement procedure.
Engine oil capacity
Oil change:
1.7 L (1.8 US qt, 1.5 Imp qt)
Oil and filter change: 1.8 L (1.9 US qt, 1.6 Imp qt)
Engine overhaul:
1.9 L (2.0 US qt, 1.7 Imp qt)
When reassembling the oil filter, make sure that the oil
filter is installed as shown above. If the filter is installed
improperly, serious engine damage may result.
ENGINE OIL HOSES
Inspect initially at five hours of operation and every
30 hours thereafter.
Inspect the engine oil hoses for damage and oil leakage. If any
damages are found, replace the engine oil hoses with new ones.
PERIODIC MAINTENANCE
2-13
THROTTLE CABLE PLAY
Inspect initially at five hours of operation and every
30 hours thereafter.
Remove the fuel tank. (
4-2)
A twin throttle cable system is used in this motorcycle. Cable 1
is for pulling and cable 2 is for returning. To adjust the cable
play, adjust the returning cable first and then adjust the pulling
cable.
RETURNING CABLE PLAY
The returning cable should be adjusted to have a thread length A
of 3 mm (0.12 in) as shown in the illustration. If the adjustment is
necessary, adjust the thread length in the following way:
Loosen the locknut 3.
Turn the nut 4 to obtain the thread length A of 3 mm
(0.12 in).
Tighten the locknut 3 securely.
PULLING CABLE PLAY
The pulling cable should be adjusted to have a cable play B of
2 – 4 mm (0.08 – 0.16 in) as shown in the Fig. If the adjustment
is necessary, adjust the cable play in the following way:
Loosen the locknuts (5, 6).
Turn the adjuster 7 or 8 to obtain the cable play B of
2 – 4 mm (0.08 – 0.16 in).
Tighten the locknuts (5, 6) securely.
8 61
2
7 5
43
A
After the adjustment is completed, check that handlebar movement does not raise the engine idle speed and
that the throttle grip returns smoothly and automatically.
B
2-14
PERIODIC MAINTENANCE
ENGINE IDLE SPEED
Inspect initially at five hours of operation and every
30 hours thereafter.
NOTE:
Make this adjustment when the engine is hot.
Connect the multi circuit tester to the high-tension cord.
Start the engine and set the engine idle speed between 1 700
and 1 900 r/min by turning the throttle stop screw 1.
1
Engine idle speed: 1 800 ± 100 r/min
09900-25008: Multi circuit tester set
ENGINE COOLANT
Replace every two years of operation.
ENGINE COOLANT LEVEL CHECK
NOTE:
This motorcycle has an overflow tank at the end of the breather
hose. Therefore, the engine coolant level may decrease while
riding. Check the engine coolant level before every ride.
Remove the radiator cap 1 and check that the engine coolant level is at the bottom of the inlet hole.
If not, replenish the radiator with the specified coolant.
Do not open the radiator cap when the engine is hot,
as you may be injured by escaping hot liquid or vapor.
Engine coolant may be harmful if swallowed or if it
comes in contact with the skin or eyes. If engine coolant gets into the eyes or contacts the skin, flush the
eyes or wash the skin thoroughly, with plenty of water. If engine coolant is swallowed, induce vomiting
and call a physician immediately.
1
PERIODIC MAINTENANCE
ENGINE COOLANT REPLACEMENT
Remove the radiator cap 1 and drain plug 2. Then drain the
engine coolant.
Tighten the drain plug 2.
Pour the specified engine coolant slowly into the radiator.
1
Engine coolant:
Use an antifreeze designed for aluminum radiators
mixed with distilled water only.
Water/antifreeze mixture ratio: 50:50 – 40:60
2
NOTE:
For engine coolant information, refer to page 5-4.
AIR BLEEDING THE ENGINE COOLANT CIRCUIT
Bleed air from the air bleeder bolt 3.
Tighten the air bleeder bolt 3 to the specified torque.
Air bleeder bolt: 6.0 N·m (0.6 kgf-m, 4.3 lb-ft)
Add engine coolant up to the radiator inlet.
Tighten the radiator cap securely.
After warming up and cooling down the engine, add the specified engine coolant.
Engine coolant capacity:
1 250 ml (1.3 US qt, 1.1 Imp qt)
RADIATOR HOSES
Inspect initially at five hours of operation and every
30 hours thereafter.
Inspect the radiator hoses for damage and engine coolant leakage. If any damages are found, replace the radiator hoses with
new ones.
3
2-15
2-16
PERIODIC MAINTENANCE
CLUTCH
Inspect initially at five hours of operation and every
30 hours thereafter.
Loosen the locknut 1 and turn the adjuster 2 fully in.
Loosen the locknut 3 and turn the adjuster 4 until the clutch
lever play A is within specification.
3 4
A
2 1
Clutch lever play A: 10 – 15 mm (0.4 – 0.6 in)
Tighten the locknuts.
DRIVE CHAIN
Clean, lubricate and inspect each time the motorcycle
is ridden.
With the transmission in neutral, support the motorcycle using a
jack or wooden block and turn the rear wheel slowly by hand.
Visually inspect the drive chain for the possible damages listed
below.
Loose pins
Twisted or seized links
Damaged rollers
Kinked or binding links
Rusted links
Excessive wear
Missing O-ring seals
If any damages are found, replace the drive chain with a new
one.
The standard drive chain is RK520KZO. SUZUKI recommends to use this standard drive chain as a replacement.
NOTE:
When replacing the drive chain, replace the drive chain and
sprockets as a set.
CHECKING AND ADJUSTING
Remove the cotter pin. (E-03, 28)
Remove the rear axle nut 1.
Tense the drive chain fully by turning both drive chain adjusters 2.
2
1
PERIODIC MAINTENANCE
Count out 21 pins (20-pitch) on the drive chain and measure
the distance between the two points. If the distance exceeds
the service limit, replace the drive chain with a new one.
09900-20103: Vernier calipers
Drive chain 20-pitch length
Service Limit: 319.4 mm (12.57 in)
Loosen or tighten both chain adjusters 1 until there is 40 –
50 mm (1.6 – 2.0 in) of slack at the middle of the chain between the engine and rear sprockets as shown. The reference marks 2 on both sides of the swingarm and the edge of
each chain adjuster must be aligned to ensure that the front
and rear wheels are correctly aligned.
Drive chain slack: 40 – 50 mm (1.6 – 2.0 in)
After adjusting the drive chain, tighten the rear axle nut 3 to
the specified torque.
Rear axle nut:
100 N·m (10.0 kgf-m, 72.5 lb-ft) .. for E-03, 28
110 N·m (11.0 kgf-m, 79.5 lb-ft) .. for the other countries
CLEANING AND LUBRICATING
Clean the drive chain with kerosine. If the drive chain tends to
rust quickly, the intervals must be shortened.
Do not use trichlene, gasoline or any similar fluids.
These fluids have too great a dissolving power for this
chain and, what is more important, they can damage
the O-rings (or seals) confining the grease in the bushing to pin clearance. Remember, high durability comes
from the presence of grease in that clearance.
After cleaning and drying the chain, oil it with a heavyweight
engine oil.
1
2
3
2-17
2-18
PERIODIC MAINTENANCE
BRAKES
Inspect initially at five hours of operation and every
30 hours thereafter.
1
BRAKE PADS
The extent of brake pad wear can be checked by observing the
grooved limit line 1 on the brake pad. When the wear exceeds
the grooved limit line, replace the pads with new ones.
(
6-46 and 6-55)
1
Replace the brake pads as a set, otherwise braking performance will be adversely affected.
BRAKE PEDAL HEIGHT
Loosen the locknut 1.
Adjust the brake pedal height by turning the push rod 2 until
the pedal is 5 mm (0.2 in) A below the top face of the footrest.
Tighten the locknut 1 securely.
2
Brake pedal height: 5 mm (0.2 in)
1
A
PERIODIC MAINTENANCE
BRAKE FLUID
Inspect initially at five hours of operation and every
30 hours thereafter.
Replace every two years of operation.
BRAKE FLUID LEVEL
Keep the motorcycle upright and place the handlebar straight.
Check the brake fluid level by observing the lower limit line on
the front and rear brake fluid reservoir.
When the brake fluid level is below the lower limit line, add
brake fluid that meets the following specification to the specified level.
Specification and classification: DOT 4
The brake system is filled with an glycol-based brake
fluid, which is classified DOT 4. Do not use or mix
other types of brake fluid, such as silicone-based
and petroleum-based brake fluids when refilling the
brake system, otherwise serious damage to the brake
system will result.
Do not use any brake fluid taken from old, used, or
unsealed containers.
Do not reuse brake fluid left over from the last servicing or which has been stored for a long period of time.
When storing brake fluid, make sure to seal the container completely and keep it out of the reach of children.
When replenishing brake fluid, make sure not to get
any dust or other foreign materials in the fluid.
Brake fluid, if it leaks, will interfere with safe running
and immediately discolor painted surfaces. Check
the brake hoses and hose joints for cracks and oil
leakage before riding.
AIR BLEEDING THE BRAKE FLUID CIRCUIT
Air trapped in the brake fluid circuit acts like a cushion to absorb
a large proportion of the pressure developed by the master cylinder and thus interferes with the full braking performance of the
brake caliper. The presence of air is indicated by “sponginess” of
the brake lever and also by lack of braking force. Considering
the danger to which such trapped air exposes the machine and
rider, it is essential that, after remounting the brake and restoring the brake system to the normal condition, the brake fluid
circuit be purged of air in the following manner:
Fill the master cylinder reservoir to the top of the inspection
window. Replace the reservoir cap to prevent dirt from entering.
Attach a hose to the air bleeder valve, and insert the free end
of the hose into a receptacle.
2-19
2-20
PERIODIC MAINTENANCE
FRONT BRAKE
Bleed air from the brake system.
Squeeze and release the brake lever several times in rapid
succession and squeeze the lever fully without releasing it.
Loosen the air bleeder valve by turning it a quarter of a turn
so that the brake fluid runs into the receptacle, this will remove the tension of the brake lever causing it to touch the
handlebar grip. Then, close the air bleeder valve, pump and
squeeze the lever, and open the valve. Repeat this process
until the fluid flowing into the receptacle no longer contains
air bubbles.
NOTE:
While bleeding the brake system, replenish the brake fluid in the
reservoir as necessary. Make sure that there is always some
fluid visible in the reservoir.
Close the air bleeder valve, and disconnect the hose. Fill the
reservoir with brake fluid to the top of the inspection window.
Air bleeder valve: 7.5 N·m (0.75 kgf-m, 5.5 lb-ft)
Handle brake fluid with care: the fluid reacts chemically with paint, plastics, rubber materials, etc.
REAR BRAKE
The only difference between bleeding the front and rear brake is
that the rear master cylinder is actuated by a pedal.
PERIODIC MAINTENANCE
BRAKE HOSES
Inspect initially at five hours of operation and every
30 hours thereafter.
Replace every four years of operation.
Check the brake hoses for leakage, cracks, wear and damage. If any damages are found, replace the brake hoses with
new ones.
TIRES
Check tire pressure and the tire for damage each time
the motorcycle is ridden.
TIRE TREAD CONDITION
Operating the motorcycle with excessively worn tires will decrease riding stability and consequently invite a dangerous situation. It is highly recommended to replace a tire when the remaining depth of the tire tread reaches the following specification.
09900-20805: Tire depth gauge
Tire tread depth
Service Limit: Front 4.0 mm (0.16 in)
Rear 4.0 mm (0.16 in)
2-21
2-22
PERIODIC MAINTENANCE
TIRE PRESSURE
If the tire pressure is too high or too low, steering will be adversely affected and tire wear will increase. Therefore, maintain
the correct tire pressure for good roadability and a longer tire
life. Cold inflation tire pressure is as follows.
COLD INFLATION TIRE PRESSURE
kPa
kgf/cm2
psi
FRONT
100
1.0
14
REAR
100
1.0
14
The standard tire fitted on this motorcycle is a 80/10021 51M for the front and a 110/100-18 64M for the rear.
The use of tires other than those specified may cause
instability. It is highly recommended to use the specified tires.
SPOKE NIPPLES
Inspect each time the motorcycle is ridden.
Make sure that the nipples are tight. If necessary, tighten them
with a spoke nipple wrench.
Spoke nipple: 3.0 N·m (0.3 kgf-m, 2.0 lb-ft)
PERIODIC MAINTENANCE
STEERING
Inspect initially at five hours of operation and every
60 hours thereafter.
The steering should be adjusted properly for smooth turning of
the handlebar and safe operation. Overtight steering prevents
smooth turning of the handlebar and too loose steering will cause
poor stability. Check that there is no play in the front fork. Support the motorcycle so that the front wheel is off the ground. With
the wheel facing straight ahead, grasp the lower fork tubes near
the axle and pull forward. If play is found, adjust the steering.
(
6-23)
FRONT FORK
Inspect initially at five hours of operation and every
60 hours thereafter.
Inspect the front forks for oil leakage, scoring, or scratches on
the outer surface of the inner tubes. If any damages are found,
replace the front fork with a new one. (
6-13 and 6-14)
REAR SUSPENSION
Inspect initially at five hours of operation and every
60 hours thereafter.
Inspect the rear shock absorber for oil leakage and damage. If
any damages are found, replace the rear shock absorber with a
new one.
2-23
2-24
PERIODIC MAINTENANCE
CHASSIS NUTS AND BOLTS
Tighten initially at five hours of operation and every 30 hours thereafter.
Check that all chassis nuts and bolts are tightened to their specified torque. (Refer to page 2-25 for the
locations of following the nuts and bolts.)
ITEM
N·m
kgf-m
lb-ft
1 Front axle nut
42
42
30.5
2 Front axle pinch bolt
18
1.8
13.0
3 Front fork damper rod bolt
80
8.0
58.0
4 Front fork lower clamp bolt
32
3.2
23.0
5 Front fork upper clamp bolt
30
3.0
21.5
6 Front fork cap bolt
23
2.3
16.5
7 Steering stem head nut
90
9.0
65.0
8 Handlebar clamp bolt
23
2.3
16.5
9 Front brake master cylinder mounting bolt
10
1.0
7.0
0 Front brake caliper mounting bolt
26
2.6
19.0
A Front brake pad mounting pin
18
1.8
13.0
B Brake hose union bolt (front & rear)
23
2.3
16.5
C Brake air bleeder valve (front & rear)
7.5
0.75
5.5
D Brake disc mounting bolt (front & rear)
10
1.0
7.0
E Swingarm pivot nut
77
7.7
55.5
F Rear brake pedal bolt
29
2.9
21.0
G Rear shock absorber mounting nut (upper & lower)
55
5.5
40.0
H Cushion rod mounting nut
100
10.0
72.5
I Cushion lever mounting nut (front)
100
10.0
72.5
J Cushion lever mounting nut (center)
100
10.0
72.5
K Rear axle nut
E-03, 28
100
10.0
72.5
The other countries
110
11.0
79.5
L Rear brake pad mounting pin
18
1.8
13.0
M Rear brake master cylinder mounting bolt
10
1.0
7.0
N Rear brake master cylinder rod locknut
18
1.8
13.0
O Seat rail mounting nut (upper)
35
3.5
25.5
P Seat rail mounting bolt (lower)
35
3.5
25.5
Q Rear sprocket nut
30
3.0
21.5
R Side-stand bolt
50
5.0
36.0
S Side-stand nut
55
5.5
40.0
T Drive chain roller mounting bolt (upper & lower)
40
4.0
29.0
U Spoke nipple
3
0.3
2.0
PERIODIC MAINTENANCE
8
2
D
0
U
5
C
1
3
7
6
4
B
A
L
C
U
9
B
D
K
B
T
P
P
N
M
E
R
F
O
H
G
I
G
J
Q
T
S
2-25
2-26
PERIODIC MAINTENANCE
GENERAL LUBRICATION
Proper lubrication is important for smooth operation and long life of each working part of the motorcycle.
Major lubrication points are indicated below.
0
1
9
3
23
A
5
0
678
1
2
3
4
Odometer cable
Odometer gearbox
Wheel bearing
Sidestand pivot
5
6
7
8
4
Drive chain
Swingarm pivot
Cushion lever pivot
Cushion lever rod pivot
9 Brake pedal pivot
0 Brake lever holder
A Clutch lever holder
NOTE:
Before lubricating each part, remove any rust and wipe off any grease, oil, dirt, or grime.
Lubricate exposed parts which are subject to rust, with a rust preventative spray, especially whenever the
motorcycle has been operated under wet or rainy conditions.
PERIODIC MAINTENANCE
2-27
COMPRESSION PRESSURE CHECK (DR-Z400E)
The compression pressure reading of a cylinder is a good indicator of its internal condition.
The decision to overhaul the cylinder is often based on the results of a compression test. Periodic maintenance records kept at your dealership should include compression readings for each maintenance service.
Compression pressure
Standard: 1 000 kPa (10.0 kgf/cm2, 142 psi)
(Automatic decompression actuated)
Low compression pressure can indicate any of the following conditions:
Excessively worn cylinder walls
Worn piston or piston rings
Piston rings stuck in grooves
Poor valve seating
Ruptured or otherwise defective cylinder head gasket
NOTE:
When the compression pressure goes below specification, check the engine for conditions listed above.
COMPRESSION TEST PROCEDURE
NOTE:
Before testing the engine for compression pressure, make sure
that the cylinder head bolts are tightened to the specified
torque values and the valves are properly adjusted.
Warm up the engine before testing.
Make sure that the battery is fully charged.
Remove the related parts and test the compression pressure in
the following manner.
Remove the spark plug. (
2-9)
Install the compression gauge and adaptor in the spark plug
hole. Make sure that the connection is tight.
Keep the throttle lever in the fully open position.
Press the starter button and crank the engine for a few seconds.
Record the maximum gauge reading as the cylinder compression.
09915-64510: Compression gauge set
09915-63310: Adaptor
2-28
PERIODIC MAINTENANCE
OIL PRESSURE CHECK
Check the engine oil pressure periodically. This will give a good indication of the condition of the moving
parts.
Oil pressure:
Above 40 kPa (0.4 kgf/cm2, 5.7 psi)
at 3 000 r/min, oil temp at 60°C
Below 140 kPa (1.4 kgf/cm2, 19.9 psi)
Low or high oil pressure can indicate any of the following conditions:
LOW OIL PRESSURE
Clogged oil filter
Oil leakage from the oil passage
Damaged O-ring
Defective oil pump
Combination of the above items
HIGH OIL PRESSURE
Engine oil viscosity is too high
Clogged oil passage
Combination of the above items
OIL PRESSURE TEST PROCEDURE
Connect a tachometer to the high-tension cord.
Remove the main oil gallery plug 1.
Install the oil pressure gauge and adaptor into the main oil
gallery.
Warm up the engine as follows:
Summer: 10 minutes at 2 000 r/min
Winter: 20 minutes at 2 000 r/min
After warming up the engine, increase the engine speed to
3 000 r/min (check the tachometer), and then read the oil pressure gauge.
09915-74510: Oil pressure gauge
09915-70610: Adapter
1
3
ENGINE
3-1
ENGINE
CONTENTS
ENGINE COMPONENTS REMOVABLE WITH THE ENGINE IN PLACE ........................ 3- 2
ENGINE REMOVAL AND REMOUNTING ........................................................................ 3- 3
ENGINE REMOVAL ...................................................................................................... 3- 3
ENGINE REMOUNTING ............................................................................................... 3- 8
ENGINE DISASSEMBLY ................................................................................................... 3-11
ENGINE COMPONENTS INSPECTION AND SERVICE ................................................. 3-22
CYLINDER HEAD ......................................................................................................... 3-22
CAMSHAFT/AUTOMATIC DECOMPRESSION ASSEMBLY ...................................... 3-31
CYLINDER .................................................................................................................... 3-33
PISTON AND PISTON RING ........................................................................................ 3-33
CONROD ....................................................................................................................... 3-35
CRANKSHAFT ............................................................................................................. 3-36
STARTER CLUTCH (DR-Z400E) ................................................................................. 3-36
STARTER TORQUE LIMITER (DR-Z400E) ................................................................. 3-37
OIL PUMP ..................................................................................................................... 3-37
CLUTCH ........................................................................................................................ 3-37
GEARSHIFT FORK AND GEAR .................................................................................. 3-38
TRANSMISSION ........................................................................................................... 3-39
BEARINGS .................................................................................................................... 3-42
OIL SEALS .................................................................................................................... 3-45
ENGINE REASSEMBLY ..................................................................................................... 3-47
CRANKSHAFT .............................................................................................................. 3-47
GEARSHIFT CAM AND FORK .................................................................................... 3-48
CRANKCASE ................................................................................................................ 3-49
STARTER CLUTCH AND GENERATOR ROTOR ........................................................ 3-50
BALANCER SHAFT ..................................................................................................... 3-51
PRIMARY DRIVE GEAR ............................................................................................... 3-52
GEARSHIFT CAM DRIVEN GEAR ............................................................................... 3-52
GEARSHIFT SHAFT ..................................................................................................... 3-53
OIL PUMP ..................................................................................................................... 3-53
KICK STARTER (DR-Z400) .......................................................................................... 3-54
CAM CHAIN .................................................................................................................. 3-55
CLUTCH ........................................................................................................................ 3-55
RIGHT CRANKCASE COVER ...................................................................................... 3-57
CLUTCH COVER .......................................................................................................... 3-57
GENERATOR ROTOR COVER ..................................................................................... 3-57
STARTER DRIVE GEAR COVER (DR-Z400E) ............................................................ 3-58
PISTON RING ................................................................................................................ 3-58
PISTON AND CYLINDER ............................................................................................. 3-59
CYLINDER HEAD ......................................................................................................... 3-60
CAMSHAFT/AUTOMATIC DECOMPRESSION ASSEMBLY ....................................... 3-61
CYLINDER HEAD COVER ............................................................................................ 3-63
CAM CHAIN TENSION ADJUSTER ............................................................................. 3-64
3
3-2
ENGINE
ENGINE COMPONENTS REMOVABLE WITH ENGINE IN PLACE
The parts listed below can be removed and installed without removing the engine from the frame. Refer to
the page listed in each section for removal and installation instructions.
ENGINE LEFT SIDE
PARTS
Engine sprocket
Starter drive/driven gear (DR-Z400E)
Generator rotor
Starter clutch
REMOVAL
3-6
3-14
3-19
3-19
INSTALLATION
3-9
3-57, 3-58
3-50
3-50
REMOVAL
3-5
3-14
3-4
3-16
3-16
3-17
3-18
3-18
3-18
3-19
3-19
3-17
INSTALLATION
3-10
–
3-10
3-56
3-56
3-56
3-53
3-53
3-53
3-52
3-51
3-54
REMOVAL
4-10
3-4
3-11
3-11
3-12
3-12
3-13
3-13
3-13
3-17
INSTALLATION
4-15
–
3-64
3-63
3-61
3-61
3-60
3-60
3-59
3-55
ENGINE RIGHT SIDE
PARTS
Exhaust pipe/muffler
Oil filter
Kick lever (DR-Z400)
Clutch pressure plate, drive plates, and driven plates
Clutch sleeve hub
Primary driven gear assembly
Oil pump drive/driven gear
Oil pump
Gearshift shaft
Gearshift cam driven gear
Balancer drive/driven gear
Kick starter drive/driven gear (DR-Z400)
ENGINE CENTER
PARTS
Carburetor
Starter motor (DR-Z400E)
Cam chain tension adjuster
Cylinder head cover
Camshaft/automatic decompression assembly
Decompression lever assembly (DR-Z400)
Cylinder head
Cylinder
Piston
Cam chain
ENGINE
ENGINE REMOVAL AND REMOUNTING
ENGINE REMOVAL
Before taking the engine out of the frame, wash the engine using a steam cleaner. Engine removal is sequentially explained in
the following steps.
Remove the seat and frame covers. (
6-2)
Drain the engine oil. (
2-11)
Drain the engine coolant. (
2-15)
Remove the carburetor. (
4-10)
Disconnect the - battery lead wire and engine ground coupler. (DR-Z400E)
Remove the engine side covers.
Remove the engine plate.
Disconnect the generator couplers.
-
3-3
3-4
ENGINE
Remove the regulator/rectifier.
Remove the engine coolant overflow tank mounting bolt.
Disconnect the spark plug cap 1 , engine oil breather
hose 2, engine oil hose 3, and engine oil tank 4.
1
3
2
4
3
Remove the clutch release arm 5.
Remove the starter motor 6. (DR-Z400E)
6
5
3
Remove the kick lever. (DR-Z400)
ENGINE
3-5
Remove the exhaust pipe 1 and muffler 2.
1
2
1
Disconnect the radiator hoses.
Disconnect the decompression cable. (DR-Z400)
Disconnect the engine oil pipe 3 and engine oil hose union
bolt 4.
3
4
3
3-6
ENGINE
Remove the gearshift lever.
Remove the engine sprocket cover.
Flatten the washer 1 and remove the engine sprocket nut
2 while pressing down on the rear brake pedal.
1
2
Remove the cotter pins and brake pedal.
Replace the removed cotter pins with new ones.
Remove the engine sprocket.
ENGINE
Remove the engine from the frame.
3-7
3-8
ENGINE
ENGINE REMOUNTING
Remount the engine in the reverse order of engine removal.
Install the engine mounting nuts and bolts.
NOTE:
Temporally tighten the nuts at this stage.
The engine mounting nuts are self-locking. Once the nut has
been removed, it is no longer of any use.
Replace the engine mounting nuts with new ones.
Hold the bolthead with a wrench, and then tighten the engine mounting nuts to the specified torque.
A
I
B
G
A
B
A
H
C
B
D
E
F
ITEM
A
B
C
N·m
40
66
77
kgf-m
4.0
6.6
7.7
lb-ft
29.0
47.5
55.5
LENGTH
Bolt D
Bolt E
Bolt F
Bolt G
Bolt H
Bolt I
90 mm (3.5 in)
100 mm (3.9 in)
115 mm (4.5 in)
50 mm (2.0 in)
50 mm (2.0 in)
245 mm (9.6 in)
D
ENGINE
Tighten the brake pedal bolt to the specified torque.
Brake pedal bolt: 29 N·m (2.9 kgf-m, 21.0 lb-ft)
NOTE:
After installing the brake pedal, install the new cotter pins into
the brake pedal bolt and pin.
Install the engine sprocket, with side A of the sprocket facing
toward the engine.
A
Tighten the engine sprocket nut to the specified torque.
Engine sprocket nut: 110 N·m (11.0 kgf-m, 79.5 lb-ft)
NOTE:
When tightening the engine sprocket nut, depress the brake
pedal.
Bend the washer securely.
Tighten the engine oil hose union bolt to the specified torque.
Engine oil hose union bolt: 23 N·m (2.3 kgf-m, 16.5 lb-ft)
3-9
3-10
ENGINE
Tighten the exhaust pipe nut 1, exhaust pipe bolt 2, muffler connection bolt 3, muffler mounting bolt 4 and muffler
mounting nut 5 to the specified torque.
Exhaust pipe nut and bolt : 23 N·m (2.3 kgf-m, 16.5 lb-ft)
Muffler connection bolt:
20 N·m (2.0 kgf-m, 14.5 lb-ft)
Muffler mounting nut and bolt:
23 N·m (2.3 kgf-m, 16.5 lb-ft)
1
4
3
2
5
Apply THREAD LOCK SUPER “1303” to the kick lever bolt,
and then tighten it. (DR-Z400)
99000-32030: THREAD LOCK SUPER “1303”
Pour 1.9 L (2.0 US qt, 1.7 Imp qt) of an API service classified
SF or SG engine oil that has a viscosity rating of SAE 10W-40,
into the oil filler hole, located in the frame, after overhauling it.
Start the engine and allow it to run for about three minutes at
idle speed.
Turn off the engine and wait about three minutes, and then
check the oil level on the dipstick.
Engine oil capacity
Oil change:
1.7 L (1.8 US qt, 1.5 Imp qt)
Oil and filter change: 1.8 L (1.9 US qt, 1.6 Imp qt)
Engine overhaul:
1.9 L (2.0 US qt, 1.7 Imp qt)
Adjust the following items to specification.
Throttle cable play .............................................
Engine idle speed ..............................................
Brake pedal ........................................................
2-13
2-14
2-18
ENGINE
3-11
ENGINE DISASSEMBLY
Remove the cap bolt 1 and cam chain tension adjuster 2.
2
1
Remove the top-dead-center (TDC) plug 3 and generator
cover cap 4.
3
4
Turn the generator rotor until the “T” line on the generator
rotor is aligned with the center of the hole in the generator
cover.
NOTE:
When removing the cylinder head cover, the piston must be at
TDC of the compression stroke.
Remove the spark plug.
Remove the cylinder head cover bolts in diagonal stages,
and then remove the cylinder head cover.
T
3-12
ENGINE
Remove the cam chain guide 1 and camshaft journal holders 2.
1
Remove the dowel pins 3, intake camshaft 4 and exhaust
camshaft 5.
2
3
NOTE:
Do not drop the dowel pins into the crankcase.
4
5
3
Remove the decompression lever assembly. (DR-Z400)
Remove the cylinder head side bolt.
NOTE:
Do not drop the cam chain into the crankcase.
Remove the four cylinder head bolts in diagonal stages.
NOTE:
Before loosening the cylinder head bolts, loosen the cylinder
head bolts (6 mm) and cylinder base nuts.
ENGINE
3-13
Remove the cylinder head bolts, and then remove the cylinder
head.
NOTE:
If the cylinder head does not come off easily, lightly tap it using a
plastic mallet.
Remove the cylinder head gasket 1 and dowel pins 2.
2
1
Remove the cam chain guide 3.
Remove the cylinder base nuts 4, and then remove the cylinder.
NOTE:
If the cylinder does not come off easily, lightly tap it using a plastic mallet.
3
4
Remove the cylinder gasket 5 and dowel pins 6.
5
6
Place a clean rag over the cylinder base to prevent the piston pin circlip from dropping into the crankcase.
Remove the piston pin circlip.
Draw out the piston pin and remove the piston.
3-14
ENGINE
Remove the generator rotor cover. (DR-Z400)
Remove the starter drive gear cover 1 and starter drive
gear 2. (DR-Z400E)
1
2
Remove the generator rotor cover. (DR-Z400E)
Remove the starter driven gear 3 , dowel pins 4 , and
gasket 5.
3
5
4
Remove the oil filter cap 6 and oil filter 7.
6
7
4
ENGINE
3-15
Remove the water pump cover.
Remove the clutch cover.
Remove the right crankcase cover.
Remove the dowel pins 1 and gasket 2.
2
1
1
Loosen the clutch spring set bolts working in diagonal stages,
and then remove them when they are fully loosened.
3-16
ENGINE
Remove the clutch pressure plate, clutch drive plates, and
clutch driven plates.
Remove the push rod, spring washer, and spring washer
seat.
Flatten the clutch sleeve hub washer.
Hold the clutch sleeve hub using the special tool, and then
remove the clutch sleeve hub nut.
09920-53740: Clutch sleeve hub holder
Remove the clutch sleeve hub and washer.
ENGINE
3-17
Remove the primary driven gear assembly and collar.
Remove the cam chain tensioner 1 and cam chain 2.
1
2
Remove the retainer 3, spacer 4 and kick starter driven
gear 5. (DR-Z400)
3
5
4
Remove the kick starter assembly 6. (DR-Z400)
Remove the kick starter guide 7. (DR-Z400)
6
7
Remove the retainer 8 and spacer 9. (DR-Z400E)
8
9
3-18
ENGINE
Remove the oil pump idle gear 1 and oil pump driven
gear 2.
1
2
Remove the pin 3 and oil pump assembly.
Do not remove the circrip A, before separating the
crankase to prevent the oil pump idle gear shaft from
dropping into the crankcase.
A
3
Remove the gearshift shaft 4 by removing the circlip 5.
Remove the gearshift arm stopper 6.
6
5
4
Remove the gearshift pawl lifter 7 and gearshift cam driven
gear 8.
7
8
Remove the gearshift cam stopper arm.
ENGINE
Remove the gearshift cam driven gear bolt.
Hold the generator rotor using the special tool (DR-Z400) or
a 26-mm offset wrench (DR-Z400E), and then remove the
balancer driven gear nut.
09930-44913: Rotor holder
Remove the washer, balancer driven gear, and key.
Hold the generator rotor using the special tool (DR-Z400) or
a 26-mm offset wrench (DR-Z400E), and then remove the
primary drive gear nut.
09930-44913: Rotor holder
Remove the washer, primary drive gear, pin, key, and balancer drive gear.
The primary drive gear nut has left-hand threads.
Hold the generator rotor using the special tool (DR-Z400) or
a 26-mm offset wrench (DR-Z400E), and then remove the
generator rotor nut.
09930-44913: Rotor holder
Remove the generator rotor using the special tool.
09930-31921: Rotor remover
NOTE:
Do not use the rotor remover attachment to remove the generator rotor, since it will not fit on the end of the crankshaft.
Temporarily install the generator rotor nut to the crankshaft,
and then remove the generator rotor using the special tool.
Do not hit the generator rotor with a hammer, otherwise the rotor may be damaged.
3-19
3-20
ENGINE
Remove the left crankcase securing bolts.
Remove the right crankcase securing bolts.
Separate the crankcase using the special tool.
09920-13120: Crankcase separating tool
NOTE:
Fit the crankcase separating tool to the right side, so that the
tool plate is paralleled with the end face of the crankcase.
Remove the dowel pins.
Remove the gear shift fork shafts 1, gear shift forks 2, and
gear shift cam 3.
1
2
1
2
3
ENGINE
Remove the countershaft assembly 1 and driveshaft assembly 2.
Remove the balancer shaft.
Remove the crankshaft from the crankcase using the special tool.
09920-13120: Crankcase separating tool
Remove the oil sump filter.
1
2
3-21
3-22
ENGINE
ENGINE COMPONENTS INSPECTION
AND SERVICE
CYLINDER HEAD
DISASSEMBLY
Identify the position of each removed part. Organize
the parts in their respective groups (i.e., exhaust or intake) so that they can be installed in their original positions.
Remove the intake pipe.
Remove the engine coolant hose housing.
Remove the tappets 1 and shims 2 by hand or by using a
magnet.
Compress the valve springs, and then remove the valve cotters from the valve stem using the special tools.
09916-14510: Valve spring compressor
09916-14910: Attachment
09916-84511: Tweezers
Remove the valve spring retainer and valve springs.
Remove the valve from the other side.
1
2
1
2
ENGINE
Remove the oil seal with long-nose pliers.
Remove the valve spring seat.
NOTE:
Removal of valves completes ordinary disassembling work. If
valve guides have to be removed for replacement after inspecting the related parts, carry out the steps shown in the valve guide
servicing.
CYLINDER HEAD DISTORTION
Decarbonize the combustion chamber.
Check the gasket surface of the cylinder head for distortion using a straightedge and thickness gauge. Take clearance readings at several places. If any clearance reading exceeds the service limit, replace the cylinder head with a new one.
09900-20803: Thickness gauge
Cylinder head distortion
Service Limit: 0.05 mm (0.002 in)
VALVE STEM RUNOUT
Support the valve using V-blocks and measure the valve stem
runout using the dial gauge, as shown. If the runout exceeds the
service limit, replace the valve with a new one.
09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09900-21304: V-block set (100 mm)
Valve stem runout
Service Limit: 0.05 mm (0.002 in)
3-23
3-24
ENGINE
VALVE HEAD RADIAL RUNOUT
Support the valve using a V-block and measure the valve head
radial runout using the dial gauge, as shown. If the runout exceeds the service limit, replace the valve with a new one.
09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09900-21304: V-block set (100 mm)
Valve head radial runout
Service Limit: 0.03 mm (0.001 in)
VALVE FACE WEAR
Visually inspect each valve face for wear or damage. If any abnormal wear is found, replace the respective valve with a new
one. Measure the valve face thickness T. If the valve face thickness is not within the specified value, replace the valve with a
new one.
09900-20101: Vernier calipers
Valve face thickness T
Service Limit: 0.5 mm (0.02 in)
VALVE STEM DEFLECTION
Lift the valve about 10 mm (0.39 in) from the valve seat. Measure the valve stem deflection in two directions, “X” and “Y”, perpendicular to each other. Position the dial gauge as shown. If the
deflection exceeds the service limit, determine whether the valve
or the guide should be replaced with a new one.
09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
Valve stem deflection
Service Limit: 0.35 mm (0.014 in)
VALVE STEM WEAR
Measure the valve stem outside diameter using the micrometer.
If the outside diameter is not within the specified value, replace
the valve with a new one. If the valve stem outside diameter is
within specification, but the valve stem deflection is not, replace
the valve guide with a new one. After replacing the valve or valve
guide, check the deflection.
09900-20205: Micrometer (0 – 25 mm)
Valve stem O.D.
Standard:
IN: 4.975 – 4.990 mm (0.1959 – 0.1965 in)
EX: 4.955 – 4.970 mm (0.1951 – 0.1957 in)
X
Y
ENGINE
VALVE GUIDE SERVICING
Drive the valve guide out toward the camshaft side using the
valve guide remover.
09916-44310: Valve guide remover/installer
NOTE:
Discard the removed valve guide.
Only oversized valve guides are available as replacement
parts.
Refinish the valve guide holes in the cylinder head using the
valve guide reamer and handle.
09916-34580: Valve guide reamer (10.8 mm)
09916-34542: Reamer handle
Oil the stem hole of each valve guide and drive the guide
into the guide hole using the valve guide installer and attachment.
09916-44310: Valve guide remover/installer
09916-53360: Valve guide installer attachment
Failure to oil the valve guide hole before driving the
new guide into place may result in a damaged guide or
head.
After fitting the valve guides, refinish their guiding bores with
the valve guide reamer. Be sure to clean and oil the guides
after reaming.
09916-34570: Valve guide reamer (5.0 mm)
09916-34542: Reamer handle
3-25
3-26
ENGINE
VALVE SEAT WIDTH
Coat the valve seat uniformly with prussian blue. Install the
valve and attach a valve lapper onto it. Tap the coated seat
with the valve face in a rotating manner, in order to obtain a
clear impression of the seating contact.
09916-10911: Valve lapper set
The ring-like dye impression left on the valve face must be
continuous, without any breaks. In addition, the width of the
dye ring, which is the valve seat width, must be within the
following specification.
Valve seat width W
Standard: 0.9 – 1.1 mm (0.035 – 0.043 in)
If the valve seat is out of specification, re-cut the seat.
VALVE SEAT SERVICING
The valve seats for both the intake and exhaust valves are machined to three different angles. The seat contact surface is cut
at 45°.
intake
exhaust
60˚
60˚
30˚
45°
15°
30°
60°
Intake
N-128
—
N-128
N-114
Exhaust
N-128
N-121
—
N-114
For USA
Valve seat cutter: N-114, N-121, and N-128
Solid pilot:
N-100-5.0
For the other countries
09916-21110: Valve seat cutter set
09916-22420: Cutter N-128
09916-22430: Cutter N-114
09916-20610: Cutter N-121
09916-24311: Solid pilot N-100-5.0
NOTE:
Use the solid pilot N-100-5.0 along with the valve seat cutters
N-114, N-121, and N-128.
The valve seat contact area must be inspected after
each cut.
45˚
45˚
15˚
ENGINE
When installing the solid pilot 1, rotate it slightly.
1
Seat the pilot snugly. Install the 45° cutter 2, attachment 3,
and T-handle 4.
4
3
2
INITIAL SEAT CUT
Descale and clean up the seat using the 45° cutter. Rotate
the cutter one or two turns.
Measure the valve seat width W after every cut.
W
45°
If the valve seat is pitted or burned, use the 45° cutter to
condition the seat some more.
NOTE:
Cut only the minimum amount necessary from the seat to prevent the possibility of the tappet shim replacement.
3-27
3-28
ENGINE
TOP NARROWING CUT
If the contact area is too high on the valve, or if it is too wide,
use the 30° cutter ( for the intake side ) and the 15° cutter (for
the exhaust side) to lower and narrow the contact area.
w
30˚
W
15°
FINAL SEAT CUT
If the contact area is too low or too narrow, use the 60° cutter
to raise and widen the contact area. If the contact area is too
high or too wide, use the 15° cutter to lower and narrow it to
the correct width.
After the desired seat position and width is achieved, use the
60° cutter very lightly to clean up any burrs caused by the
previous cutting operations.
DO NOT use a lapping compound after the final cut is
made. The finished valve seat should have a velvety
smooth finish but not a highly polished or shiny one.
This will provide a soft surface for the final seating of
the valve which will occur during the first few seconds
of engine operation.
NOTE:
After servicing the valve seats, be sure to check the tappet clearance after the cylinder head has been installed. (
2-5 to 2-8)
w
60˚
ENGINE
VALVE SEAT SEALING CONDITION INSPECTION
With the valve and valve spring assembled, pour a small quantity of gasoline into the intake or exhaust port.
Check that no gasoline leaks through the valve seat. If leakage
is found, correct the sealing surface.
Gasoline is highly flammable and explosive.
Keep heat, sparks, and flames away from gasoline.
VALVE SPRING
The force of the coil spring keeps the valve seat tight. A weakened spring results in reduced engine power output and accounts
for the chattering noise coming from the valve mechanism.
Check the valve springs for proper strength by measuring their
free length and also by the force required to compress them. If
the spring length is less than the service limit or if the force required to compress the valve spring is not within specification,
replace both the inner and outer springs as a set.
Valve spring free length (IN & EX)
Service Limit:
INNER: 32.6 mm (1.28 in)
OUTER:36.3 mm (1.43 in)
Valve spring tension (IN & EX)
Standard:
INNER: 5.6 – 6.4 kgf/27.4 mm (12.3 – 14.1 lbs/1.08 in)
OUTER:12.6 – 14.5 kgf/30.9 mm (27.7 – 32.0 lbs/1.22 in)
3-29
3-30
ENGINE
REASSEMBLY
Install each valve spring seat.
Apply molybdenum oil solution to each oil seal and press-fit
them into position.
Do not reuse the oil seals.
Apply molybdenum oil solution to the valve as shown, and
then insert them into the valve guides.
When inserting each valve into the valve guides, make
sure not to damage the lip of the oil seal.
Install the valve spring with the smaller pitch A facing the
cylinder head.
B Larger pitch
C Down
Install the valve spring retainer by pressing down the spring
using the valve lifter. Fit the cotter halves to the stem end and
release the lifter to allow the cotter 1 to wedge between the
retainer and the valve stem. Make sure that the rounded lip 2
of the cotter fits snugly into the groove 3 in the stem end.
09916-14510: Valve spring compressor
09916-14910: Attachment
09916-84511: Tweezers
Be sure to install all of the parts in their original positions.
ENGINE
CAMSHAFT/AUTOMATIC DECOMPRESSION ASSEMBLY
Do not attempt to disassemble the camshaft/automatic
decompression assembly. It is not serviceable.
AUTOMATIC DECOMPRESSION
Move the automatic decompression weight by hand to inspect if
it is operating smoothly. If the automatic decompression weight
does not operate smoothly, replace it with a new one.
CAM WEAR
Worn-down cams are often the cause of mistimed valve operation resulting in reduced power output.
Measure the cam height H using the micrometer. If the cams
are worn to the service limit, replace the camshaft with new a
one.
09900-20202: Micrometer (25 – 50 mm)
Cam height H
Service Limit:
IN: 36.610 mm (1.4413 in)
EX: 36.580 mm (1.4402 in)
3-31
3-32
ENGINE
CAMSHAFT JOURNAL WEAR
Measure the oil clearance, with the camshaft installed, using the
plastigauge.
09900-22301: Plastigauge
09900-22302: Plastigauge
Camshaft journal oil clearance (IN & EX)
Service Limit: 0.150 mm (0.0059 in)
Tighten the camshaft journal holder bolts evenly and in diagonal
stages to the specified torque.
Camshaft journal holder bolt:
10 N·m (1.0 kgf-m, 7.0 lb-ft)
NOTE:
Do not rotate the camshaft with the plastigauge in place.
Remove the journal holders and read the width of the compressed
plastigauge with the envelope scale. This measurement should
be taken at the widest part of the compressed plastigauge.
If the camshaft journal oil clearance exceeds the service limit,
measure the inside diameter of the camshaft journal holder and
outside diameter of the camshaft journal. Replace the camshaft
or the cylinder head and camshaft holder depending upon which
one exceeds the specification.
09900-22403: Small bore gauge
Camshaft journal holder I.D. (IN & EX)
Standard: 22.012 – 22.025 mm (0.8666 – 0.8671 in)
09900-20205: Micrometer (0 – 25 mm)
Camshaft journal O.D. (IN & EX)
Standard: 21.972 – 21.993 mm (0.8653 – 0.8659 in)
CAMSHAFT RUNOUT
Support the valve using V-blocks and measure the camshaft
runout using the dial gauge. If the runout exceeds the service
limit, replace the camshaft with a new one.
09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09900-21304: V-block set (100 mm)
Camshaft runout
Service Limit: 0.10 mm (0.004 in)
ENGINE
CYLINDER
CYLINDER DISTORTION
Check the gasket surface of the cylinder block for distortion using a straightedge and thickness gauge. Take clearance readings at several places. If any clearance reading exceeds the service limit, replace the cylinder block with a new one.
09900-20803: Thickness gauge
Cylinder distortion
Service Limit: 0.05 mm (0.002 in)
CYLINDER BORE
Inspect the cylinder wall for any scratches, nicks or other damage. Measure the cylinder bore diameter at six places.
09900-20508: Cylinder gauge set
Cylinder bore
Standard: 90.000 – 90.015 mm (3.5433 – 3.5439 in)
PISTON AND PISTON RING
PISTON DIAMETER
Measure the piston diameter using the micrometer at 15 mm
(0.6 in) from the skirt end.
If the piston diameter is less than the service limit, replace the
piston with a new one.
09900-20204: Micrometer (75 – 100 mm)
Piston diameter
Service Limit: 89.880 mm (3.5386 in)
3-33
3-34
ENGINE
PISTON-RING-TO-GROOVE CLEARANCE
Measure the side clearances of the 1st and 2nd piston rings
using the thickness gauge. If any clearance reading exceeds the
service limit, replace both the piston and piston rings.
09900-20803: Thickness gauge
09900-20205: Micrometer (0 – 25 mm)
Piston-ring-to-groove clearance
Service Limit:
1st: 0.18 mm (0.0071 in)
2nd: 0.15 mm (0.0059 in)
Piston ring groove width
Standard:
1st: 0.78 – 0.80 mm (0.0307 – 0.0315 in)
1.30 – 1.32 mm (0.0512 – 0.0520 in)
2nd: 0.81 – 0.83 mm (0.0319 – 0.0327 in)
Oil: 2.01 – 2.03 mm (0.0791 – 0.0799 in)
Piston ring thickness
Standard:
1st: 0.71 – 0.76 mm (0.0280 – 0.0299 in)
1.08 – 1.10 mm (0.0425 – 0.0433 in)
2nd: 0.77 – 0.79 mm (0.0303 – 0.0311 in)
PISTON RING FREE END GAP AND PISTON RING END GAP
Measure the piston ring free end gap using the vernier calipers,
first, and then fit the piston ring squarely into the cylinder and
measure the piston ring end gap using the thickness gauge.
If any measurement exceeds the service limit, replace the piston ring with a new one.
09900-20101: Vernier calipers
Piston ring free end gap
Service Limit:
1st: 5.5 mm (0.22 in)
2nd: 9.2 mm (0.36 in)
09900-20803: Thickness gauge
Piston ring end gap
Service Limit:
1st: 0.50 mm (0.020 in)
2nd: 0.50 mm (0.020 in)
ENGINE
PISTON PIN AND PIN BORE
Measure the piston pin bore diameter using the small bore gauge.
If the diameter exceeds the service limit, replace the piston with
a new one.
09900-20602: Dial gauge (1/1000 mm)
09900-22403: Small bore gauge (18 – 35 mm)
Piston pin bore
Service Limit: 20.030 mm (0.7886 in)
Measure the piston pin outside diameter at three positions using the micrometer. If any measurement exceeds the service
limit, replace the piston pin with a new one.
09900-20205: Micrometer (0 – 25 mm)
Piston pin O.D.
Service Limit: 19.980 mm (0.7866 in)
CONROD
CONROD SMALL END I.D.
Measure the conrod small end inside diameter using the small
bore gauge.
If the conrod small end inside diameter exceeds the service limit,
replace the conrod with a new one.
09900-20605: Dial calipers
Conrod small end I.D.
Service Limit: 20.040 mm (0.7890 in)
CONROD DEFLECTION AND BIG END SIDE CLEARANCE
Wear on the big end of the conrod can be estimated by checking
the movement of the small end of the rod. This method can also
be used to check the extent of wear on the parts of the conrod’s
big end.
09900-20701: Magnetic stand
09900-20606: Dial gauge (1/100 mm)
09900-21304: V-block set (100 mm)
Conrod deflection
Service Limit: 3.0 mm (0.12 in)
Push the big end of the conrod to one side and measure the
side clearance using a thickness gauge. If the clearance exceeds
the service limit, replace the crankshaft assembly with a new
one or bring the deflection and the side clearance within the
service limit by replacing the worn parts (conrod, big end bearing, crank pin, etc.) with new ones.
09900-20803: Thickness gauge
Big end side clearance
Service Limit: 1.00 mm (0.039 in)
3-35
3-36
ENGINE
CRANKSHAFT
CRANKSHAFT RUNOUT
Support the crankshaft using V-blocks and measure the crankshaft runout using the dial gauge, as shown. If the runout exceeds the service limit, replace the crankshaft with a new one.
09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09910-21304: V-block set (100 mm)
Crankshaft runout
Service Limit: 0.08 mm (0.003 in)
STARTER CLUTCH (DR-Z400E)
Hold the rotor with a 26-mm offset wrench and remove the
hexagon bolts.
Install the starter clutch in the proper direction as shown.
NOTE:
When installing the starter clutch onto the rotor, make sure that
the notch A in the bearing faces to the rotor.
Apply engine oil to the starter clutch.
Apply THREAD LOCK SUPER “1303” to the hexagon bolts,
and then tighten them to the specified torque while holding
the rotor and using a 26-mm offset wrench.
99000-32030: THREAD LOCK SUPER “1303”
Starter clutch bolt: 26 N·m (2.6 kgf-m, 19.0 lb-ft)
Install the starter gear 1 to the starter clutch.
Check that the rotor 2 turns in the direction of the arrow 3
on the rotor while holding the starter gear, and that the rotor
never turns in the opposite direction of the arrow.
1
2
3
ENGINE
STARTER TORQUE LIMITER (DR-Z400E)
Do not attempt to disassemble the starter torque limiter. It is unserviceable.
Check the slip torque of the starter torque limiter using the special tools and vise as shown, if the slip torque is not within the
specified torque, replace the starter torque limiter with a new
one.
09930-73170: Starter torque limiter holder
09930-73180: Starter torque limiter socket
Slip torque:
30 – 55 N·m (3.0 – 5.5 kgf-m, 21.5 – 40.0 lb-ft)
OIL PUMP
The oil pump case securing screw is applied with
SUZUKI THREAD LOCK SUPER “1303”. If an attempt is
made to overhaul the oil pump assembly, the screw may
be damaged. Only the oil pump unit is available as a
replacement.
99000-32030: THREAD LOCK SUPER “1303”
CLUTCH
CLUTCH DRIVE PLATES
Measure the thickness of the clutch drive plates using vernier
calipers. If a clutch drive plate is not within the service limit, replace the clutch plates as a set.
09900-20101: Vernier calipers
Drive plate thickness (No.1 & No.2)
Service Limit: 2.62 mm (0.103 in)
Drive plate claw width (No.1 & No.2)
Service Limit: 13.2 mm (0.520 in)
CLUTCH DRIVEN PLATES
Measure each clutch driven plate for distortion using the thickness gauge. If a clutch driven plate is not within the service
limit, replace the clutch plates as a set.
09900-20803: Thickness gauge
Driven plate distortion
Service Limit: 0.10 mm (0.004 in)
3-37
3-38
ENGINE
CLUTCH SPRING FREE LENGTH
Measure the free length of each clutch spring using vernier
calipers. If any spring is not within the service limit, replace all
of the springs with new ones.
09900-20101: Vernier calipers
Clutch spring free length
Service Limit: 49.9 mm (1.96 in)
GEARSHIFT FORK AND GEAR
GEARSHIFT-FORK-TO-GEARSHIFT-FORK GROOVE
CLEARANCE
Clearance for each gearshift fork plays an important role in the
smoothness and positiveness of the shifting process.
Measure the gearshift fork clearance in the groove of its respective gear using the thickness gauge.
If the clearance exceeds specification, replace the fork, its respective gear, or both.
09900-20803: Thickness gauge
09900-20101: Vernier calipers
Gearshift-fork-to-gearshift-fork-groove clearance
Service Limit: 0.50 mm (0.020 in)
Shift fork groove width
Standard: 4.8 – 4.9 mm (0.189 – 0.193 in)
Shift fork thickness
Standard: 4.6 – 4.7 mm (0.181 – 0.185 in)
ENGINE
TRANSMISSION
DISASSEMBLY
Disassemble the transmission gears as shown.
1
2
3
4
5
6
7
8
9
0
A
B
C
D
Countershaft
5th (top) drive gear
Circlip
3rd drive gear
Circlip
4th drive gear
2nd drive gear
Circlip
Bearing
Bearing
Driveshaft
Washer
2nd driven gear
Spacer
E
F
G
H
I
J
K
L
M
N
O
P
Bearing
Oil seal
4th driven gear
3rd driven gear
Washer
Circlip
5th (top) driven gear
Washer
1st (low) driven gear
Spacer
Washer
Bearing
3-39
3-40
ENGINE
REASSEMBLY
Reassemble the transmission in the reverse order of disassembly. Pay special attention to the following points:
NOTE:
Before installing the gears, apply engine oil to the inner surface
of each gear and bushing.
Never reuse a circlip. After a circlip has been removed from a shaft, it should be discarded and a
new circlip must be installed.
When installing a new circlip, do not expand the end
gap larger than required to slip the circlip over the
shaft.
After installing a new circlip, make sure that it is
completely seated in its groove and securely fitted.
NOTE:
When reassembling the transmission, attention must be given
to the locations and positions of the washers and circlips. The
cross sectional view shows the correct position of the gears,
washers, and circlips. (
3-41)
When installing a new circlip, pay attention to the direction of
the circlip. Fit it to the side where the thrust is, as shown. The
rounded side should be against the gear surface.
A Thrust
B Sharp edge
ENGINE
2
A
1
1 Countershaft
2 Driveshaft
3-41
3-42
ENGINE
BEARINGS
Wash the bearing with a cleaning solvent and lubricate it with
motor oil before inspection. Rotate the inner race and check to
see that it turns smoothly. If it does not turn quietly and smoothly,
or if there are signs of any abnormalities, the bearing is defective and must be replaced with a new one as follows.
RIGHT COUNTERSHAFT BEARING
Remove the bearing retainer.
Remove the right countershaft bearing using the special tool.
09921-20220: Bearing remover set
Replace the removed bearing with a new one.
Install the right countershaft bearings using the special tool.
09913-70210: Bearing installer set
Apply a small quantity of THREAD LOCK “1342” or THREAD
LOCK SUPER “1322” to the bearing retainer screws, and
tighten them securely.
For USA
99000-32050: THREAD LOCK “1342”
For the other countries
99000-32110: THREAD LOCK SUPER “1322”
LEFT COUNTERSHAFT BEARING
Remove the left countershaft bearing using the special tool.
09923-73210: Bearing remover
09930-30102: Sliding hammer
Replace the removed bearing with a new one.
Install the left countershaft bearing using the special tool.
09913-70210: Bearing installer set
ENGINE
DRIVESHAFT BEARINGS
Remove the right and left driveshaft bearings using the special tool.
09921-20220: Bearing remover set
Replace the removed bearings with new ones.
Install the right and left driveshaft bearings using the special
tool.
09913-70210: Bearing installer set
CRANKSHAFT BEARINGS
Remove the bearing retainer.
Remove the right and left crankshaft bearings using the special tools.
09921-20220: Bearing remover set
Replace the removed bearings with new ones.
Install the right and left crankshaft bearing using the special
tool.
09913-70210: Bearing installer set
RIGHT GEARSHIFT CAM BEARING
Remove the bearing retainer.
Remove the right gearshift cam bearing.
Replace the removed bearing with a new one.
Install the right gearshift cam bearing.
3-43
3-44
ENGINE
LEFT GEARSHIFT CAM BEARING
Remove the left gear shift cam bearing.
Replace the removed bearing with a new one.
Install the left gearshift cam bearing.
RIGHT BALANCER SHAFT BEARING
Remove the right balancer shaft bearing using the special
tool.
09921-20220: Bearing remover set
Replace the removed bearing with a new one.
Install the right balancer shaft bearing using the special tool.
09913-70210: Bearing installer set
LEFT BALANCER SHAFT BEARING
Remove the left balancer shaft bearing using the special tools.
09921-20210: Bearing remover
09930-30102: Sliding hammer
Replace the removed bearing with a new one.
Install the left balancer shaft bearing using the special tool.
09913-70210: Bearing installer set
ENGINE
OIL SEALS
Damage to the lip of the oil seal may result in leakage of the air/
fuel mixture or engine oil. Inspect the oil seal for wear or damage. If any damages are found, replace the oil seal with a new
one.
Install the oil seals into the crankcase, clutch housing case,
and generator rotor cover. Pay attention to the following points:
Replace the removed oil seals with new ones.
Apply SUZUKI SUPER GREASE “A” to the lip of the oil seals.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
DRIVESHAFT OIL SEAL
Remove the collar 1 and retainer 2.
2
1
Remove the driveshaft oil seal from the left crankcase using
the special tool.
09913-50121: Oil seal remover
Replace the removed oil seal with a new one.
3-45
3-46
ENGINE
Install the driveshaft oil seal into the left crankcase slowly,
using the special tool.
09913-70210: Bearing installer set
GEARSHIFT SHAFT OIL SEAL
Remove the gearshift shaft oil seal from the left crankcase,
slowly using the special tool.
09913-50121: Oil seal remover
Replace the removed oil seal with a new one.
Install the gearshift shaft oil seal into the left crankcase slowly,
using the special tool.
09913-70210: Bearing installer set
OIL CHECK VALVE
Remove the bushing 1, oil check valve ball 2 and spring 3
from the right crankcase cover.
Install the spring 3, oil check valve ball 2 and bushing 1 to
the right crankcase cover 4 as shown.
The rubber part of bushing 1 must face to the outside.
ENGINE
ENGINE REASSEMBLY
Reassemble the engine in the reverse order of disassembly.
Pay special attention to the following points:
NOTE:
Apply engine oil to each running and sliding part before reassembling the engine.
CRANKSHAFT
1
2
3
4
5
6
7
Bearing
Crankshaft (R)
Conrod
Bearing
Crank pin
Crankshaft (L)
Bearing
Determine the width between the webs referring to the figure when rebuilding the crankshaft.
Crank-web-to-web-width
Standard: 62.0 ± 0.1 mm (2.441 ± 0.004 in)
When mounting the crankshaft in the crankcase, it is necessary to pull its left end into the crankcase by using the special
tools.
09910-32812: Crankshaft installer
09940-52861: Attachment
Never fit the crankshaft into the crankcase by striking
it with a plastic hammer.
Always use the special tool, otherwise the accuracy of
the crankshaft alignment will be affected.
3-47
3-48
ENGINE
GEARSHIFT CAM AND FORK
1
2
3
4
5
6
7
8
9
Gearshift
Gearshift
Gearshift
Bearing
Pin
Gearshift
Bearing
Gearshift
Gearshift
fork No.1
fork No.2
fork shaft
cam
fork No.3
fork shaft
Install the gearshift forks into the gearshifting grooves in the
correct position and direction.
Install the gearshift fork shafts.
NOTE:
After the gearshift fork shaft and gearshift forks have been
fitted, make sure that the gears engage normally.
Set the transmission gears to the neutral position.
ENGINE
CRANKCASE
Reassemble the crankcase in the reverse order of disassembly. Pay special attention to the following points:
Thoroughly remove the sealant material and oil stains on
the mating surface of the right and left crankcases.
Before installing the sump filter, wash the sump filter with cleaning solvent, and then blow compressed air through it to dry it
off.
Install the dowel pins to the left crankcase.
Apply engine oil to the conrod big end and to the transmission gears.
Apply SUZUKI BOND “1207B” or “1215” to the mating surface of the right crankcase and A part of both crankcases
as shown.
For USA
99104-31140: SUZUKI BOND “1207B”
For the other countries
99000-31110: SUZUKI BOND “1215”
A
/
3-49
3-50
ENGINE
Tighten the crankcase bolts to the specified torque.
Crankcase bolt: 11 N·m (1.1 kgf-m, 8.0 lb-ft)
After the crankcase bolts have been tightened, check if the
crankshaft, countershaft, and driveshaft rotate smoothly. If a
large resistance is felt to rotation, try to free the shafts by
tapping them with a plastic mallet.
STARTER CLUTCH AND GENERATOR
ROTOR
Remove the grease from the tapered portion of the crankshaft and the generator rotor.
Install the starter driven gear 1 and key 2.
Tighten the generator rotor nut to the specified torque using
the special tool (DR-Z400) or a 26-mm offset wrench (DRZ400E).
09930-44913: Rotor holder
Generator rotor nut: 100 N·m (10.0 kgf-m, 72.5 lb-ft)
1
2
ENGINE
BALANCER SHAFT
1
2
3
4
5
6
Washer
Balancer driven gear
Bearing
Pin
Balancer shaft
Bearing
A Balancer shaft nut
ITEM
A
N·m
50
kgf-m
5.0
lb-ft
36.0
When installing the balancer drive gear, align the pin 1 with
the groove 2.
1
2
When installing the balancer driven gear, align the pin 3
with the groove 4.
Install the balancer driven gear by aligning the matching
marks.
3
4
Hold the generator rotor using the special tool (DR-Z400) or
a 26-mm offset wrench (DR-Z400E), and then tighten the
balancer shaft nut to the specified torque.
09930-44913: Rotor holder
Balancer shaft nut: 50 N·m (5.0 kgf-m, 36.0 lb-ft)
3-51
3-52
ENGINE
PRIMARY DRIVE GEAR
1
Install the key 1 and primary drive gear 2.
2
Hold the generator rotor using the special tool (DR-Z400) or
a 26-mm offset wrench (DR-Z400E), and then tighten the
primary drive gear nut to the specified torque.
09930-44913: Rotor holder
Primary drive gear nut: 110 N·m (11.0 kgf-m, 79.5 lb-ft)
GEARSHIFT CAM DRIVEN GEAR
Tighten the gearshift cam driven gear bolt to the specified
torque.
Gearshift cam driven gear bolt:
24 N·m (2.4 kgf-m, 17.5 lb-ft)
Install each pawl lifter into the gearshift cam driven gear. The
large shoulder A must face to the outside.
Apply a small quantity of THREAD LOCK “1342” or THREAD
LOCK SUPER “1322” to the pawl lifter screws, and then tighten
them securely.
For USA
99000-32050: THREAD LOCK “1342”
For the other countries
99000-32110: THREAD LOCK SUPER “1322”
ENGINE
GEARSHIFT SHAFT
Tighten the gearshift arm stopper to the specified torque.
Gearshift arm stopper: 19 N·m (1.9 kgf-m, 13.5 lb-ft)
OIL PUMP
Before mounting the oil pump, apply engine oil to the sliding
surfaces of the oil pump case, outer rotor, inner rotor, and
shaft.
When installing the inner rotor, align the pin 1 with the
groove 2.
1
2
Apply a small quantity of THREAD LOCK “1342” or THREAD
LOCK SUPER “1322” to the threaded parts of the oil pump
mounting screws, and then tighten them.
For USA
99000-32050: THREAD LOCK “1342”
For the other countries
99000-32110: THREAD LOCK SUPER “1322”
When installing the oil pump driven gear, align the pin 3 with
the groove 4.
3
4
3-53
3-54
ENGINE
KICK STARTER (DR-Z400)
1
2
3
4
5
6
7
8
9
0
A
B
C
Oil seal
Guide
Spring
Kick starter shaft
Kick starter drive gear
Washer
Circlip
Kick starter
Spring
Washer
Bolt
Kick starter guide
Kick starter stopper
When installing the kick starter drive gear onto the kick starter
shaft, align the punch mark 1 on the kick starter with the line
3 on the kick starter shaft.
2
Install the kick starter shaft assembly and hook the end of
the spring onto the crankcase boss.
1
ENGINE
CAM CHAIN
Install the cam chain 1 on to the sprocket.
Tighten the cam chain tensioner mounting bolt 2 to the specified torque.
Cam chain tensioner mounting bolt:
10 N·m (1.0 kgf-m, 7.0 lb-ft)
CLUTCH
1
2
3
4
5
6
7
8
9
0
A
B
C
D
E
F
G
H
Clutch release camshaft
Bolt
Spring retainer
Spring
Pressure plate
Drive plate (7 pcs)
Driven plate (7 pcs)
Drive plate (1 pc)
Bearing
Push piece
Washer
Spring washer
Spring washer seat
Clutch sleeve hub
Washer
Primary driven gear assembly
Spacer
Push rod
A Clutch sleeve hub nut
ITEM
A
N·m
70
kgf-m
7.0
lb-ft
50.5
2
1
3-55
3-56
ENGINE
Hold the clutch sleeve hub using the special tool, and then
tighten the clutch sleeve hub nut to the specified torque.
09920-53740: Clutch sleeve hub holder
Clutch sleeve hub nut: 70 N·m (7.0 kgf-m, 50.5 lb-ft)
Bend the tongue of the washer securely.
Install the spring washer seat 1 and spring washer 2 onto
the clutch sleeve hub correctly.
Insert the clutch drive plates and driven plates one by one
into the clutch sleeve hub in the prescribed order.
NOTE:
Be sure to install the drive plate with an inside diameter of
122.5 mm (4.82 in), first.
Two different types of drive plates are used: one with an inside diameter of 122.5 mm (4.82 in) and seven with an inside
diameter of 116 mm (4.5 in). For further information refer to
page 3-55.
Tighten the clutch spring set bolts securely in diagonal stages.
ENGINE
RIGHT CRANKCASE COVER
Install the dowel pins 1 and new gasket 2.
3-57
2
1
Use a new gasket to prevent oil leakage.
1
Tighten the right crankcase cover bolts securely.
A
NOTE:
Install the new gasket onto the right crankcase cover bolt A as
shown.
CLUTCH COVER
Tighten the clutch cover bolts securely.
A
NOTE:
Install the new gasket onto the clutch cover bolt A as shown.
GENERATOR ROTOR COVER
Install the starter driven gear 1 (DR-Z400E), dowel pins 2,
and new gasket 3.
1
3
Use a new gasket to prevent oil leakage.
2
Tighten the generator rotor cover bolts securely. (DR-Z400)
2
3-58
ENGINE
Tighten the generator rotor cover bolts securely. (DR-Z400E)
STARTER DRIVE GEAR COVER (DR-Z400E)
Tighten the starter drive gear cover screws securely.
PISTON RING
Install the oil ring first, the 2nd ring second, and the 1st ring
last.
NOTE:
The 1st 1 and 2nd 2 piston rings differ in shape.
The 1st and 2nd piston rings should be installed with the mark
facing up.
1
2
ENGINE
First, install a spacer 1 into the oil ring groove, and then
install the two side rails 2. The spacer and side rails do not
have a designated top and bottom. They can be installed in
any position.
When installing the spacer, be careful not to allow its
two ends to overlap in the groove.
È INCORRECT
É CORRECT
Position the piston ring gaps as shown. Before inserting the
piston into its cylinder, check that the gaps are properly positioned.
A Exhaust side
B Intake side
3 2nd ring and lower side rail
4 Upper side rail
5 1st ring and spacer
PISTON AND CYLINDER
Install the piston and cylinder in the reverse order of removal.
NOTE:
Install the piston with the punch mark on the piston head facing
toward the exhaust side.
Apply molybdenum oil solution onto the piston pin.
Apply molybdenum oil solution to the small end of the conrod.
Place a clean rag over the cylinder base to prevent the piston
pin circlip from dropping into the crankcase, and then fit the
piston pin circlip with long-nose pliers.
Use a new piston pin circlip to prevent circlip failure
with a bent one.
Apply engine oil to the sliding surface of the piston and big
end of the conrod.
3-59
3-60
ENGINE
Install the dowel pins 1 and new gasket 2 onto the crankcase.
2
Use a new gasket to prevent oil leakage.
1
Hold each piston ring with the piston ring sections positioned
correctly and put it into the cylinder. Make sure that the piston
rings are caught by the cylinder skirt.
NOTE:
When mounting the cylinder, after attaching the camshaft
drive chain, keep the camshaft drive chain taut. The camshaft drive chain must not be caught between the cam drive
chain sprocket and crankcase when the crankshaft is rotated.
NOTE:
There is a holder for the bottom end of the cam chain guide
cast in the crankcase. Make sure that the guide 1 is inserted
properly or binding of the cam chain and guide may result.
1
CYLINDER HEAD
Install the dowel pins 1 and new gasket 2.
1
2
Use a new cylinder head gasket to prevent gas leakage.
ENGINE
With the head snugly seated on the cylinder, secure it by
tightening the bolts in diagonal stages. Tighten the cylinder
head bolts to the specified torque.
Cylinder head bolt
Initial: 25 N·m (2.5 kgf-m, 18.0 lb-ft)
Final: 46 N·m (4.6 kgf-m, 33.5 lb-ft)
NOTE:
Apply engine oil to the threaded parts of the cylinder head
bolts and its washers.
Be sure to install the washer with rounded side facing up.
1
After tightening the cylinder head bolts to specification, tighten
the cylinder head bolts 1 and cylinder nuts 2 to the specified torque.
Cylinder head bolt: 10 N·m (1.0 kgf-m, 7.0 lb-ft)
Cylinder nut:
10 N·m (1.0 kgf-m, 7.0 lb-ft)
2
Tighten the cylinder head side bolt to the specified torque.
Cylinder head side bolt: 14 N·m (1.4 kgf-m, 10.0 lb-ft)
NOTE:
Be sure to install the gasket with the core bar facing toward the
head of the bolt.
Install the decompression lever assembly to the cylinder head,
and tighten its bolt 3 to the specified torque. (DR-Z400)
3
Decompression bolt: 10 N·m (1.0 kgf-m, 7.0 lb-ft)
CAMSHAFT/AUTOMATIC DECOMPRESSION ASSEMBLY
Turn the generator rotor until the “T” line on the generator
rotor is aligned with the center of the hole in the generator
cover.
If the crankshaft is turned without drawing the cam
chain upward, the cam chain will catch between crankcase and cam chain drive sprocket.
T
3-61
3-62
ENGINE
NOTE:
Just before installing the camshaft into the cylinder head, apply
molybdenum oil solution to the camshaft journals and cam faces.
Also, apply engine oil to the camshaft journal holders.
Place each camshaft into the correct position.
NOTE:
Camshafts which are marked “EX” are for the exhaust side and
those marked “IN” are for the intake side.
With the “T” line aligned with the center of the hole, hold the camshaft steady and lightly pull up the cam
chain to remove any slack between the cam chain drive sprocket and exhaust camshaft sprocket.
The exhaust camshaft sprocket has an arrow marked “1” 1. Turn the exhaust camshaft so that the
arrow is aligned with the gasket surface of the cylinder head. Engage the cam chain with the exhaust
camshaft sprocket.
The other arrow marked “2” 2 should now be pointing straight up. Starting from the roller pin that is
directly above the arrow marked “2” 2, count out 15 roller pins (from the exhaust camshaft side going
towards the intake camshaft side).
Engage the 15th roller pin on the cam chain with the arrow marked “3” 3 on the intake sprocket. Refer to
the following illustrations.
NOTE:
The cam chain should now be on all three sprockets. Be careful not to move the crankshaft until the camshaft journal holders and cam chain tensioner are secured.
1st pin
15th pin
3
3
2
1
2
2
3
1
1
ENGINE
Install the dowel pins.
Place each camshaft journal holders and cam chain guide
into the correct position.
NOTE:
Camshaft journal holders marked “EX” are for the exhaust side
and those marked “IN” are for the intake side.
Tighten the camshaft journal holder bolts to the specified
torque.
Camshaft journal holder bolt:
10 N·m (1.0 kgf-m, 7.0 lb-ft)
NOTE:
When tightening the camshaft journal holder bolts, the piston
position must be at TDC on the compression stroke.
CYLINDER HEAD COVER
Thoroughly wipe off oil from the fitting surfaces of the cylinder head and cover.
Apply SUZUKI BOND “1207B” to the end caps of the cylinder
head cover gasket as shown.
For USA
99104-31140: SUZUKI BOND “1207B”
For the other countries
99000-31140: SUZUKI BOND “1207B”
Apply engine oil to both sides of the washer 1.
Lightly tighten the cylinder head cover bolts in diagonal stages,
and then tighten them to the specified torque.
Cylinder head cover bolt
Initial: 10 N·m (1.0 kgf-m, 7.0 lb-ft)
Final: 14 N·m (1.4 kgf-m, 10.0 lb-ft)
Use a new washers 1 and cushion 2.
1
2
3-63
3-64
ENGINE
CAM CHAIN TENSION ADJUSTER
Install the cam chain tension adjuster. Pay special attention to
the following points:
Apply engine oil to the push rod.
Turn the adjusting screw clockwise with a flat-bladed screwdriver until the push rod is locked.
Fit a new gasket to the chain tension adjuster body.
Use a new gasket to prevent oil leakage.
Install the cam chain tension adjuster body to the cylinder,
and then tighten the two Allen bolts to the specified torque.
Cam chain tension adjuster bolt:
10 N·m (1.0 kgf-m, 7.0 lb-ft)
Turn the adjusting screw counterclockwise with a flat-bladed
screwdriver to unlock.
Tighten the cam chain tensioner spring holder bolt to the specified torque.
Cam chain tensioner spring holder bolt:
8 N·m (0.8 kgf-m, 6.0 lb-ft)
FUEL AND LUBRICATION SYSTEM
4-1
FUEL AND LUBRICATION SYSTEM
CONTENTS
FUEL TANK .................................................................................................... 4- 2
REMOVAL .................................................................................................. 4- 2
REMOUNTING ........................................................................................... 4- 2
FUEL VALVE .................................................................................................. 4- 3
REMOVAL AND INSPECTION .................................................................. 4- 3
FUEL STRAINER ....................................................................................... 4- 3
REMOUNTING ........................................................................................... 4- 3
CARBURETOR .............................................................................................. 4- 4
CONSTRUCTION ...................................................................................... 4- 4
SPECIFICATIONS...................................................................................... 4- 5
I.D. NO. LOCATION .................................................................................... 4- 5
SLOW SYSTEM .......................................................................................... 4- 6
COASTING ENRICHMENT SYSTEM ......................................................... 4- 6
MAIN SYSTEM ........................................................................................... 4- 7
ACCELERATOR PUMP SYSTEM .............................................................. 4- 8
STARTER SYSTEM .................................................................................... 4- 9
FLOAT SYSTEM ......................................................................................... 4- 9
REMOVAL .................................................................................................. 4-10
DISASSEMBLY .......................................................................................... 4-10
CLEANING................................................................................................. 4-13
INSPECTION ............................................................................................. 4-14
REASSEMBLY .......................................................................................... 4-14
REMOUNTING ........................................................................................... 4-15
LUBRICATION SYSTEM ............................................................................... 4-16
ENGINE LUBRICATION SYSTEM CHART .............................................. 4-16
4
4-2
FUEL AND LUBRICATION SYSTEM
FUEL TANK
REMOVAL
Remove the seat and side covers. (
6-2)
Turn the fuel valve to the “OFF” position.
Disconnect the fuel hose.
Gasoline is highly flammable and explosive.
Keep heat, sparks, and flames away from gasoline.
Remove the fuel tank.
REMOUNTING
Remount the fuel tank in the reverse order of removal.
FUEL AND LUBRICATION SYSTEM
FUEL VALVE
REMOVAL AND INSPECTION
Remove the fuel tank. (
Drain the fuel completely.
Remove the fuel valve.
4-2)
Gasoline is highly flammable and explosive.
Keep heat, sparks, and flames away from gasoline.
Replace the removed O-ring with a new one to prevent fuel leakage.
Tighten the fuel valve mounting bolts to the specified torque.
Fuel valve mounting bolt: 4.4 N·m (0.44 kgf-m, 3.2 lb-ft)
FUEL STRAINER
If the fuel strainer is dirty with sediment or rust, fuel will not flow
smoothly and loss in engine power may result. Clean the fuel
strainer with compressed air.
REMOUNTING
Remount the fuel valve in the reverse order of removal.
4-3
4-4
FUEL AND LUBRICATION SYSTEM
CARBURETOR
CONSTRUCTION
1
2
3
4
5
6
7
8
9
0
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
Top cap
Throttle valve lever
Throttle valve
Throttle lever assembly
Carburetor body
Intake joint
O-ring
Slow air jet
Main air jet
Air jet
Throttle position sensor
Starter plunger
Hose
Coasting richer pump assembly
Hose
Hose
Pilot screw
Starter jet
Needle jet
Pilot jet
Main jet
Needle valve
Valve seat
Float pin
Float
Float chamber
O-ring
Throttle stop screw
Accelerating pump assembly
FUEL AND LUBRICATION SYSTEM
SPECIFICATIONS
SPECIFICATION
ITEM
DR-Z400
E-03, 28
←
E-01
←
39 mm (1.5 in)
←
←
←
29F0
29F1
29F3
29F4
1800 ± 100 r/min
←
←
←
9.0±1.0mm(0.35±0.04in)
←
←
←
(M.J.)
#165
#142
#165
#142
(M.A.J.)
#200
←
←
←
Carburetor type
Bore size
I.D. No.
Idle r/min
Float height
Main jet
Main air jet
DR-Z400E
E-03, 28
←
E-01
KEIHIN FCR39H
Jet needle
(J.N.)
OBDXP-4th
←
←
←
Needle jet
(N.J.)
2.9 mm (0.11 in)
←
←
←
Slow jet
(S.J.)
#45
←
←
←
(S.A.J.)
#60
←
←
←
Air jet
(A.J.)
#90
←
←
←
Pilot screw
(P.S.)
1 1/2 turns out
←
←
←
2–4mm(0.08–0.16in)
←
←
←
Slow air jet
Throttle cable play
E-01: General
E-03: USA
E-28: Canada
I.D. NO. LOCATION
Carburetor has an I.D. number 1 printed on its body.
1
4-5
4-6
FUEL AND LUBRICATION SYSTEM
SLOW SYSTEM
This system supplies fuel during engine operation when the piston valve 1 is fully closed or slightly open.
The fuel from the float chamber 2 is metered by the pilot jet 3 where it mixes with air coming in through the
pilot air jet 4. This mixture, rich with fuel, then goes up through the pilot passage to the pilot screw 5. A part
of the mixture is discharged into the main bore from the bypass ports 6. The remainder of the mixture is
metered by the pilot screw 5 and sprayed into the main bore through the pilot outlet 7.
COASTING ENRICHMENT SYSTEM
The coasting enrichment system is included in the slow system. At normal operation, joining of the air from
carburetor inlet side pilot air passage 8 which obtains the proper air/fuel mixture ratio. When the piston
valve is closed suddenly, a high vacuum, which is generated in the main bore, is applied to the diaphragm 9.
The valve 0 which interlocks with the diaphragm 9 closes the air passage 8, and thus, produces an air/
fuel mixture that is rich with fuel. By controlling air flow in the pilot circuit, this system is able to keep combustion constant by varying the air/fuel mixture ratio.
FUEL AND LUBRICATION SYSTEM
4-7
MAIN SYSTEM
As the piston valve 1 is opened, engine speed rises and vacuum in the venturi A is increased.
The fuel in the float chamber 2 is metered by the main jet 3. The metered fuel enters the needle jet 4,
mixes with the air admitted through the main air jet 5, and then forms an emulsion.
The emulsified fuel then passes through the clearance between the needle jet 4 and jet needle 6, and is
discharged into the venturi A, in which it meets the main air stream being drawn by the engine.
Mixture proportioning is accomplished in the needle jet 4. The clearance through which the emulsified fuel
must flow depends ultimately on the throttle position.
4-8
FUEL AND LUBRICATION SYSTEM
ACCELERATOR PUMP SYSTEM
This system works only when the rider opens the throttle grip quickly as the accelerator pump sends the
necessary amount of fuel to the carburetor bore to correct the air/fuel mixture ratio. When the rider opens the
throttle grip quickly, the intake air volume increases and air velocity at the bottom of the piston valve is slow
and sucking volume of fuel is less.
The piston valve lever 1 pushes levers (2, 3), and lever 4 turns and pushes rod 5. The rod 5 pushes the
plunger 6. This plunger pushes out the fuel through the outlet pipe 7, spraying fuel into the main bore.
FUEL AND LUBRICATION SYSTEM
4-9
STARTER (ENRICHER) SYSTEM
Pulling the starter (enricher) knob causes fuel to be drawn into the starter circuit from the float chamber 1.
The starter jet 2 meters this fuel, which then flows into the fuel passage 3 and mixes with the air coming
from the float chamber. The mixture, rich in fuel, reaches starter plunger 4 and mixes again with the air
coming through a passage 5 extending from behind the diaphragm.
The two successive mixtures of the fuel with the air provide the proper air/fuel mixture for starting. This
occurs when the mixture is sprayed out through the starter outlet port 6 into the main bore.
FLOAT SYSTEM
The float 1 and needle valve 2 work in conjunction with one
another. As the float moves up and down, so does the needle
valve.
When there is a high fuel level in the float chamber 3, the float
rises and the needle valve pushes against the valve seat. When
this occurs, no fuel enters the float chamber.
As the fuel level falls the float lowers and the needle valve unseats itself; admitting fuel into the float chamber.
In this manner, the needle valve admits and shuts off fuel to
maintain the appropriate fuel level inside the float chamber.
4-10
FUEL AND LUBRICATION SYSTEM
REMOVAL
Remove the fuel tank. (
4-2)
Remove the left frame cover. (
6-2)
Disconnect the throttle position sensor coupler.
Disconnect the throttle cables.
Disconnect the coasting richer pump hose.
Loosen the carburetor clamp screws, and then remove the
carburetor assembly.
DISASSEMBLY
Remove the carburetor hoses.
FUEL AND LUBRICATION SYSTEM
First, remove the air valve mounting nut 1, and then remove the air valve mounting bolt 2 and air valve assembly
3. (DR-Z400)
1
2
Remove the throttle position sensor.
Remove the accelerating pump assembly.
Replace the removed O-ring with a new one to prevent
fuel leakage.
Remove the coasting richer pump assembly.
Replace the removed O-ring with a new one to prevent
fuel leakage.
Remove the starter plunger.
Remove the top cap.
3
4-11
4-12
FUEL AND LUBRICATION SYSTEM
Remove the throttle lever assembly.
Remove the throttle valve.
Remove the intake joint.
Replace the removed O-ring with a new one to prevent
air leakage.
Remove the float chamber.
Replace the removed O-ring with a new one to prevent
fuel leakage.
Remove the float pin 1, float 2, and needle valve 3.
2
1
3
FUEL AND LUBRICATION SYSTEM
Remove the following parts.
1
2
3
4
5
Valve seat
Main jet
Slow jet
Pilot screw
Needle jet
6
7
8
9
1
Starter jet
Main air jet
Slow air jet
Air jet
2
6
NOTE:
Before removing the pilot screw 4, its setting must be determined. Slowly turn the pilot screw clockwise and count the number of turns until it is lightly seated. Make a note of how many
turns were made.
When reassembling the pilot screw, you will want to set the pilot
screw to its original position.
3
4
CLEANING
Some carburetor cleaning chemicals, especially diptype soaking solutions, are very corrosive and must
be handled carefully. Always follow the chemical
manufacturer’s instructions for proper use, handling
and storage.
Clean all jets with a spray-type carburetor cleaner and dry
them using compressed air.
Clean all circuits of the carburetor thoroughly––not just the
perceived problem area. Clean the circuits in the carburetor
body with a spray-type cleaner. If necessary, soak each circuit in a dip-type cleaning solution to loosen dirt and varnish.
Dry the carburetor body using compressed air.
Do not use wire to clean the passageways, valve seat,
and jets. If the components cannot be cleaned with a
spray-type cleaner it may be necessary to soak the them
in a dip-type cleaning solution. Always follow the chemical manufacturer’s instructions for proper use and
cleaning of the carburetor components.
After cleaning, reassemble the carburetor with new O-rings.
Replace the removed O-rings with new ones.
5
8
9
7
Do not use wire to clean the passageways, valve seat,
and jets. Use compressed air only.
4-13
4-14
FUEL AND LUBRICATION SYSTEM
INSPECTION
Check the following items for any damage or clogging.
parts with new ones.
Pilot jet
Float
Main jet
Needle valve
Main air jet
Valve seat
Pilot air jet 1
Jet needle
Pilot air jet 2
Piston valve
Needle jet air bleeding hole Starter (enricher) jet
If any damages are found, replace the damaged
O-ring
Throttle valve
Diaphragm
Pilot outlet and bypass ports
NEEDLE VALVE INSPECTION
If foreign matter is caught between the valve seat and the needle
valve, the gasoline will continue flowing and overflow. If the valve
seat and needle valve are worn beyond the permissible limits,
similar trouble will occur. Conversely, if the needle valve sticks,
the gasoline will not flow into the float chamber.
Clean the float chamber and float parts with gasoline. If the needle
valve is worn as shown, replace it and the valve seat a new one.
Clean the fuel passage of the mixing chamber using compressed
air.
FLOAT HEIGHT ADJUSTMENT
To check the float height, turn the carburetor upside down.
Measure the float height A while the float arm is just contacting
the needle valve using vernier calipers.
Bend the tongue as necessary to bring the float height A to the
specified level.
109
A
09900-20101: Vernier calipers
Float height A: 9.0 ± 1.0 mm (0.35 ± 0.04 in)
THROTTLE POSITION SENSOR INSPECTION
Measure the resistance between the terminals as shown in the
illustration.
Throttle position sensor resistance:
Ω
Approximately 5 kΩ
NOTE:
When performing this test, it is not necessary to remove the
throttle position sensor.
Y
Bl
Ω
B
REASSEMBLY
Reassemble the carburetor in the reverse order of disassembly. Pay special attention to the following points:
PILOT SCREW
After cleaning, install the pilot screw 1 to the original setting
by turning the screw in until it lightly seats, and then backing
it out the same number of turns counted during disassembly.
1 Pilot screw
Replace the removed O-ring with a new one.
2 Carburetor body
FUEL AND LUBRICATION SYSTEM
THROTTLE POSITION SENSOR INSTALLATION
Install the throttle position sensor as described below.
Measure the resistance Ω1 between the throttle position sensor terminals as shown in the illustration.
Bl
4-15
Y
Ω2
Throttle position sensor resistance Ω1 :
Approximately 5 kΩ
Ω
Ω1
B
Measure the resistance Ω2 between the throttle position sensor terminals as shown in the illustration.
Fully open the throttle valve with the throttle lever.
Position the throttle position sensor until resistance Ω2 is 3.09
– 4.63 kΩ.
When the resistance Ω2 is within specification, tighten the
throttle position sensor mounting screws.
Throttle position sensor resistance Ω2 :
3.09 – 4.63 kΩ
Ω
Install the air valve assembly.
First tighten the bolt 3 and then tighten the nut 4.
(DR-Z400)
4
3
Keep the clearance A (0.5 – 0.7 mm) between rink arm and
carburetor body when pushing the throttle lever as shown.
A: Clearance 0.5 – 0.7 mm
If the clearance is out of specification, adjust the clearance.
REMOUNTING
Remount the carburetor assembly in the reverse order of removal. After the carburetor assembly has been remounted onto
the engine perform the following adjustments:
Throttle cable play ..................................................
2-13
Engine idle speed ..................................................
2-14
4-16
FUEL AND LUBRICATION SYSTEM
LUBRICATION SYSTEM
ENGINE LUBRICATION SYSTEM CHART
CYLINDER WALL
POSITION
CONROD SMALL END
FRAME (OIL TANK)
IN & EX CAM FACE
OIL SUMP FILTER
CAM CHAIN
CONROD BIG END BEARING
CAMSHAFT JOURNAL
OIL HOSE
CYLINDER HEAD
CRANK PIN
PISTON PIN
CYLINDER
RIGHT CRANKSHAFT
PISTON JET
OIL JET
CRANKSHAFT RIGHT END
OIL PIPE
RIGHT CRANKCASE
RIGHT CRANKCASE
CHECK
VALVE
OIL PUMP
OIL FILTER
CLUTCH COVER
BY-PASS
OIL PIPE
LEFT CRANKCASE
COUNTERSHAFT
OIL HOSE
CLUTCH
PLATES
PRIMARY GEARS
COUNTERSHAFT LEFT
END BEARING
DRIVE GEARS
DRIVESHAFT LEFT
END BEARING
DRIVESHFT
LEFT CRANKCASE
OIL PUMP
(FOR RETURN)
KICK IDEL
GEAR
(DR-Z400)
OIL SUMP FILTER
OIL PAN
DRIVEN GEARS
COOLING SYSTEM
5-1
COOLING SYSTEM
CONTENTS
COOLING SYSTEM ........................................................................................
DESCRIPTION ............................................................................................
CONSTRUCTION .......................................................................................
ENGINE COOLANT ........................................................................................
RADIATOR ......................................................................................................
INSPECTION ..............................................................................................
REMOVAL ...................................................................................................
REMOUNTING ............................................................................................
5- 2
5- 2
5- 3
5- 4
5- 5
5- 5
5- 6
5- 6
5
5-2
COOLING SYSTEM
COOLING SYSTEM
DESCRIPTION
The engine is cooled by a forced flow of engine coolant that circulates through jackets, which are formed in
the cylinder and cylinder head, and through the radiator.
A high-capacity centrifugal pump is used for the water pump and a tube-and-fin type aluminum radiator,
which is characterized by lightness in weight and good heat dissipation, is used.
Refer to the following illustration for the routing of the cooling system.
1
2
3
4
Impeller
Radiator cap
Right radiator
Left radiator
COOLING SYSTEM
CONSTRUCTION
1
2
3
4
5
6
7
Radiator cap
Radiator (R)
Radiator (L)
Radiator inlet hose
Radiator outlet hose
Overflow hose
Overflow tank
A Air bleeder bolt
ITEM
A
1
2
3
4
5
6
7
8
9
0
A
B
C
N·m
6.0
kgf-m
0.6
Circlip
Water pump driven gear
Pin
Washer
Circlip
Bearing
O-ring
Oil seal
Mechanical seal
Impeller
O-ring
Water pump cover
O-ring
lb-ft
4.3
5-3
5-4
COOLING SYSTEM
ENGINE COOLANT
At the time of manufacture, the cooling system is filled with a
50:50 mixture of distilled water and ethylene glycol antifreeze.
This mixture will provide optimum corrosion and heat protection, and will protect the cooling system from freezing at above
–31°C (–24°F).
If the motorcycle is to be exposed to temperatures below –31°C
(–24°F), the percentage of antifreeze should be increased to
55% or 60%, according to figure 2.
The characteristics of different antifreeze vary; therefore, be
sure to use the specified antifreeze.
Engine coolant: Mix antifreeze designed for aluminum radiators with distilled water
only.
Water/antifreeze mixture ratio: 50:50 – 40:60
Mix a high quality ethylene glycol based antifreeze
with distilled water only. Do not mix an alcohol based
antifreeze or different brands of antifreeze.
The percentage of antifreeze in the coolant should
be between 50 to 60%. If the percentage of antifreeze
is above or below this range the coolant’s frost protection and rust-inhibiting capabilities will be reduced. Always keep the antifreeze content above
50% even if the atmospheric temperature does not
go below the freezing point.
Engine coolant capacity: 1 250 ml (1.3 US qt, 1.1 Imp qt)
Antifreeze density
50%
55%
60%
Freezing point
–31°C (–24°F)
–40°C (–40°F)
–55°C (–67°F)
Do not open the radiator cap when the engine is hot,
as you may be injured by escaping hot liquid or vapor.
The engine must be cool before servicing the cooling system.
Engine coolant may be harmful if swallowed or if it
comes in contact with the skin or eyes. If engine coolant gets into the eyes or contacts the skin, flush the
eyes or wash the skin thoroughly, with plenty of water. If engine coolant is swallowed, induce vomiting
and call a physician immediately.
COOLING SYSTEM
RADIATOR
INSPECTION
RADIATOR
Before removing the radiator and draining the engine coolant,
check the following.
Check the cooling system for leaks with a radiator tester 1.
Remove the radiator cap and connect the radiator tester to the
filler. Pressurize the cooling system with 120 kPa (1.2 kgf/cm2,
17 psi) of pressure, and then check if it holds the pressure for 10
seconds. If the cooling system does not hold the pressure for at
least 10 seconds, check the entire cooling system for leaks. If a
leak is found, replace the damaged part.
Do not open the radiator cap when the engine is hot,
as you may be injured by escaping hot liquid or vapor.
When removing the radiator cap tester, put a rag on
the filler to prevent the engine coolant from spraying out.
Do not exceed the radiator cap release pressure, or
the radiator cap and subsequently the radiator, can be
damaged.
Check the radiator cap 2 using a radiator tester 1.
Attach the radiator cap to the radiator tester as shown. Slowly
apply pressure to the radiator cap; do not exceed 95 – 125 kPa
(0.95 – 1.25 kgf/cm2, 13.5 – 17.8 psi). If the radiator cap does
not hold the pressure for at least 10 seconds, replace it with a
new one.
Radiator cap release pressure: 95 – 125 kPa
(0.95 – 1.25 kgf/cm2, 13.5 – 17.8 psi)
Check the radiator for dirt and other foreign materials. If any are
found, clean the radiator using compressed air. Also, repair any
bent or dented fins using a small screwdriver.
Check all the water hoses for cracks, flat spots, or loose connections. Replace any damaged hoses and properly tighten any
loose connections.
5-5
5-6
COOLING SYSTEM
REMOVAL
Remove the side covers. (
Drain the engine coolant. (
6-2)
2-15)
Do not open the radiator cap when the engine is hot,
as you may be injured by escaping hot liquid or vapor.
The engine must be cool before servicing the cooling system.
Engine coolant may be harmful if swallowed or if it
comes in contact with the skin or eyes. If engine coolant gets into the eyes or contacts the skin, flush the
eyes or wash the skin thoroughly, with plenty of water. If engine coolant is swallowed, induce vomiting
and call a physician immediately.
Disconnect the radiator hoses.
Remove the radiator.
REMOUNTING
Remount the radiator in the reverse order of removal. After remounting the radiator, be sure to add engine coolant. (
2-15)
COOLING SYSTEM
WATER PUMP
REMOVAL AND DISASSEMBLY
5-7
1
Drain the engine coolant. (
2-15)
Drain the engine oil. (
2-11)
92P50060
2
Do not open the radiator cap when the engine is hot,
as you may be injured by escaping hot liquid or vapor.
The engine must be cool before servicing the cooling system.
Engine coolant may be harmful if swallowed or if it
comes in contact with the skin or eyes. If engine coolant gets into the eyes or contacts the skin, flush the
eyes or wash the skin thoroughly, with plenty of water. If engine coolant is swallowed, induce vomiting
and call a physician immediately.
Disconnect the radiator hose 1 and right engine side cover 2.
Remove the right crankcase cover.
Remove the water pump cover.
Remove the circlip 3, water pump driven gear 4 and pin 5.
4
5
3
Remove the E-ring 6 and impeller 7.
6
7
5-8
COOLING SYSTEM
INSPECTION
WATER PUMP BEARING
Inspect the inner race play of the water pump bearing by hand
while it is in the water pump housing. Rotate the inner race by
hand to inspect it for abnormal noise and smooth rotation. If abnormal noise occurs or if rough movement is noted, replace the
water pump bearing with a new one.
Remove the water pump bearing using the special tool, as follows:
Insert the bearing remover attachment into the water pump
bearing.
Install the wedge from the opposite side and lock it into the
slit of the bearing remover attachment.
Drive out the water pump bearing by knocking the wedge bar.
09941-50111: Bearing remover
Replace the removed bearing with a new one.
MECHANICAL SEAL
Visually inspect the mechanical seal for damage. If any damages are found, replace the mechanical seal with a new one.
Remove the mechanical seal 1.
Replace the removed mechanical seal with a new one.
REASSEMBLY
Reassemble and remount the water pump in the reverse order
of removal and disassembly. Pay attention to the following points:
Install the water pump bearings using the special tool.
09913-70210: Bearing installer set
COOLING SYSTEM
Apply SUZUKI SUPER GREASE “A” to the new O-rings.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
When installing the water pump driven gear align the pin 1
with the groove 2.
After installing the water pump, be sure to add engine coolant. (
2-15)
2
1
5-9
CHASSIS
6-1
CHASSIS
CONTENTS
EXTERIOR PARTS ...................................................................................................................................... 6- 2
REMOVAL .............................................................................................................................................. 6- 2
REMOUNTING ....................................................................................................................................... 6- 2
FRONT WHEEL ........................................................................................................................................... 6- 3
CONSTRUCTION .................................................................................................................................. 6- 3
REMOVAL AND DISASSEMBLY .......................................................................................................... 6- 5
INSPECTION ......................................................................................................................................... 6- 6
REASSEMBLY AND REMOUNTING .................................................................................................... 6- 8
FRONT FORK ............................................................................................................................................ 6-10
CONSTRUCTION ................................................................................................................................. 6-10
REMOVAL AND DISASSEMBLY ......................................................................................................... 6-11
INSPECTION ........................................................................................................................................ 6-13
REASSEMBLY AND REMOUNTING ................................................................................................... 6-14
SUSPENSION SETTING ...................................................................................................................... 6-17
STEERING ................................................................................................................................................. 6-18
CONSTRUCTION ................................................................................................................................. 6-18
REMOVAL AND DISASSEMBLY ......................................................................................................... 6-19
INSPECTION ........................................................................................................................................ 6-21
REASSEMBLY AND REMOUNTING ................................................................................................... 6-22
REAR WHEEL ............................................................................................................................................ 6-25
CONSTRUCTION ................................................................................................................................. 6-25
REMOVAL AND DISASSEMBLY ......................................................................................................... 6-27
INSPECTION ........................................................................................................................................ 6-28
REASSEMBLY AND REMOUNTING ................................................................................................... 6-28
REAR SUSPENSION ................................................................................................................................. 6-31
CONSTRUCTION ................................................................................................................................. 6-31
REAR SHOCK ABSORBER REMOVAL .............................................................................................. 6-33
REAR SHOCK ABSORBER INSPECTION AND DISASSEMBLY ...................................................... 6-35
REAR SHOCK ABSORBER DISPOSAL ............................................................................................. 6-35
OIL REPLACEMENT PROCEDURE .................................................................................................... 6-36
REAR SHOCK ABSORBER REASSEMBLY AND REMOUNTING ..................................................... 6-38
REAR SHOCK ABSORBER DAMPING FORCE ADJUSTMENT ....................................................... 6-39
REAR SWINGARM AND CUSHION LEVER REMOVAL ..................................................................... 6-40
INSPECTION AND DISASSEMBLY ..................................................................................................... 6-41
REASSEMBLY AND REMOUNTING ................................................................................................... 6-43
FINAL INSPECTION AND ADJUSTMENT .......................................................................................... 6-44
FRONT BRAKE .......................................................................................................................................... 6-45
CONSTRUCTION ................................................................................................................................. 6-45
BRAKE PAD REPLACEMENT ............................................................................................................. 6-46
BRAKE FLUID REPLACEMENT ......................................................................................................... 6-47
BRAKE CALIPER REMOVAL AND DISASSEMBLY ........................................................................... 6-47
BRAKE CALIPER INSPECTION .......................................................................................................... 6-48
BRAKE CALIPER REASSEMBLY AND REMOUNTING ..................................................................... 6-49
BRAKE DISC INSPECTION ................................................................................................................. 6-50
MASTER CYLINDER REMOVAL AND DISASSEMBLY ...................................................................... 6-51
MASTER CYLINDER INSPECTION ..................................................................................................... 6-52
MASTER CYLINDER REASSEMBLY AND REMOUNTING ................................................................ 6-53
REAR BRAKE ............................................................................................................................................ 6-54
CONSTRUCTION ................................................................................................................................. 6-54
BRAKE PAD REPLACEMENT ............................................................................................................. 6-55
BRAKE FLUID REPLACEMENT ......................................................................................................... 6-56
BRAKE CALIPER REMOVAL AND DISASSEMBLY ........................................................................... 6-57
BRAKE CALIPER INSPECTION .......................................................................................................... 6-58
BRAKE CALIPER REASSEMBLY AND REMOUNTING ..................................................................... 6-58
BRAKE DISC INSPECTION ................................................................................................................. 6-59
MASTER CYLINDER REMOVAL AND DISASSEMBLY ...................................................................... 6-60
MASTER CYLINDER INSPECTION ..................................................................................................... 6-61
MASTER CYLINDER REASSEMBLY AND REMOUNTING ................................................................ 6-61
6
6-2
CHASSIS
EXTERIOR PARTS
REMOVAL
1
SEAT
Remove the seat 1.
SIDE COVERS
Remove the left and right side covers 1.
1
1
FRAME COVERS
Remove the left frame cover 1 and right frame cover 2.
BATTERY COVER
Remove the battery cover 1.
REMOUNTING
Remount the seat, side covers, frame covers, and battery cover
in the reverse order of removal.
1
1
2
CHASSIS
FRONT WHEEL
CONSTRUCTION
1
2
3
4
5
6
7
8
9
0
Front axle
Odometer gearbox
Bearing (R)
Front wheel
Spacer
Bearing (L)
Dust seal
Brake disc
Spacer
Washer
A Front axle nut
B Brake disc mounting bolt
ITEM
A
B
N·m
42
10
kgf-m
4.2
1.0
lb-ft
30.5
7.0
6-3
6-4
CHASSIS
Left
Left
Right
Right
Right
Left
Spacer
Clearance
CHASSIS
REMOVAL AND DISASSEMBLY
Disconnect the odometer cable.
Remove the front axle nut 1 and loosen the front axle pinch
bolts 2.
2
2
1
Support the motorcycle with a jack or wooden block and remove the front axle 3 and front wheel 4.
3
Do not operate the brake lever during or after front
wheel removal.
4
Remove the odometer gearbox 5 and spacer 6.
5
Remove the brake disc.
6
6-5
6-6
CHASSIS
INSPECTION
ODOMETER GEARBOX DUST SEAL
Inspect the odometer gearbox dust seal for damage. If any damage is found, replace the odometer gearbox with a new one.
WHEEL HUB DUST SEAL
Inspect the wheel hub dust seal for damage. If any damage is
found, replace the wheel hub dust seal with a new one.
Remove the wheel hub dust seal using the special tool.
09913-50121: Oil seal remover
Replace the removed dust seal with a new one.
WHEEL BEARINGS
Inspect the play of the wheel bearings by hand while they are in
the wheel. Rotate the inner race by hand to inspect for abnormal
noise and smooth rotation. If any abnormal noise occurs, or rough
movement is noted, replace the wheel bearings with new ones.
CHASSIS
Remove the wheel bearings as follows:
Remove the wheel hub dust seal. (
6-6)
Insert the bearing remover attachment 1 into the wheel bearing.
Insert the wedge bar 2 from the opposite side and lock it into
the slit of the bearing remover attachment.
Drive out the wheel bearing by striking the wedge bar.
09941-50111: Bearing remover
Replace the removed bearings with new ones.
2
1
FRONT WHEEL
Make sure that the wheel runout (axial and radial) does not exceed the service limit when checked as shown. An excessive
amount of runout is usually due to worn or loose wheel bearings
and can be corrected by replacing the bearings. If bearing replacement fails to reduce the runout, replace the wheel with a
new one.
Wheel rim runout (axial and radial)
Service Limit: 2.0 mm (0.08 in)
FRONT AXLE
Measure the front axle runout using the dial gauge. If the runout
exceeds the service limit, replace the front axle with a new one.
09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09900-21304: V-block set (100 mm)
Wheel axle runout
Service Limit: 0.25 mm (0.010 in)
TIRE ..............................................................
2-21 and 2-22
SPOKE NIPPLES ......................................................
2-22
6-7
6-8
CHASSIS
REASSEMBLY AND REMOUNTING
Reassemble and remount the front wheel in the reverse order of
removal and disassembly. Pay special attention to the following
points:
WHEEL BEARINGS
Apply SUZUKI SUPER GREASE “A” to the wheel bearings.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
Install the wheel bearings using the special tool.
09924-84521: Bearing installer set
First, install the left wheel bearing, and then install the
right wheel bearing. (
6-4)
WHEEL HUB DUST SEAL
Apply SUZUKI SUPER GREASE “A” to the lip of dust seal.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
Install the wheel hub dust seal using the special tool.
09913-70210: Bearing installer set
BRAKE DISC
Make sure that the brake disc is clean and free of any grease.
Apply THREAD LOCK SUPER “1360” to the brake disc mounting bolts, and then tighten them to the specified torque.
99000-32130: THREAD LOCK SUPER “1360”
Brake disc mounting bolt: 10 N·m (1.0 kgf-m, 7.0 lb-ft)
CHASSIS
ODOMETER GEARBOX
Apply SUZUKI SUPER GREASE “A” to the odometer gearbox dust seal.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
Align the grooves 1 on the odometer gearbox with the
lugs 2 on the wheel hub.
1
2
FRONT WHEEL
Make sure that the front fork stopper 1 and the odometer
gearbox stopper 2 are installed as shown.
1
2
Tighten the front axle nut 3 to the 20 N·m (2.0 kgf-m, 14.5 lb-ft)
by holding the front axle using the special tools.
09940-34520: T handle
09940-34581: Attachment F
Tighten the front axle pinch bolts 4 to the specified torque.
Front axle pinch bolt: 18 N·m (1.8 kgf-m, 13.0 lb-ft)
3
Tighten the front axle nut to the specified torque, after tightening the axle pinch bolts.
Front axle nut: 42 N·m (4.2 kgf-m, 30.5 lb-ft)
NOTE:
After remounting the front wheel, pump the brake lever a few
times to check for proper brake operation.
4
4
6-9
6-10
CHASSIS
FRONT FORK
CONSTRUCTION
1
2
3
4
5
6
7
8
9
0
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Air valve
O-ring
Push rod
Needle
Spring
Washer
Spring
Damper rod ring
Damper
Dust seal
Stopper ring
Oil seal
Oil seal retainer
Inner tube antifriction metal
Inner tube
Outer tube antifriction metal
Clamp
Boot
Clamp
Oil lock piece
Holder
Outer tube
O-ring
End plate
O-ring
O-ring
A Front fork cap bolt
B Front fork inner rod locknut
C Front fork damper rod bolt
ITEM
A
B
C
N·m
23
22
80
kgf-m
2.3
2.2
8.0
lb-ft
16.5
16.0
58.0
CHASSIS
REMOVAL AND DISASSEMBLY
Remove the front wheel. (
6-5)
Remove the front brake caliper. (
6-47)
Remove the headlight assembly. (
7-27)
Remove the brake hose clamp 1 and odometer cable
guide 2.
1
2
Remove the front fork after loosening the front fork upper clamp
bolts 3 and lower clamp bolts 4.
NOTE:
Slightly loosen the front fork cap bolt 5 to facilitate later disassembly.
5
3
4
Remove the boot.
Replace the removed boot clamps with new ones.
Remove the cap bolt out of the inner tube and slowly pull
down the inner tube.
Hold the piston rod locknut with a 17-mm wrench and special
tool.
Remove the cap bolt, washer, and spring.
09940-94922: Front fork stopper plate
6-11
6-12
CHASSIS
Invert the fork and stroke it several times to drain out the fork
oil.
NOTE:
Hold the fork inverted for a few minutes to drain the oil.
Remove the push rod 1, needle 2, and return spring 3.
3 2 1
Remove the dust seal 4 and stopper ring 5.
Place the front fork in a vise with soft jaws.
NOTE:
Clamp the right front fork axle holder and the left front fork brake
caliper bracket using the vise.
Do not over tighten the vise or the outer tube will be
damaged.
Remove the damper rod bolt using the special tool.
09940-54821: Front fork inner rod holder
4
5
CHASSIS
Remove the damper 1.
1
Slowly pull out the inner tube.
NOTE:
Be careful not to damage the inner tube.
Remove the oil seal 2 , oil seal retainer 3 , outer tube
antifriction metal 4 inner tube antifriction metal 5, and oil
lock piece 6.
The outer and inner tube’s antifriction metals must be
replaced along with the oil seal and dust seal when
assembling the front fork.
INSPECTION
FORK SPRING
Measure the fork spring free length. If the fork spring free length
is shorter than the service limit, replace the fork spring with a
new one.
Front fork spring free length
Service Limit: 500 mm (19.7 in)
6
43
5 3
3
2
3
6-13
6-14
CHASSIS
INNER AND OUTER TUBE
Inspect the inner tube sliding surface and outer tube sliding surface for any scuffing or damage. If any damages are found, replace the inner tube and outer tube with new ones.
DAMPER ROD RING
Inspect the damper rod ring for wear or damage. If any damages
are found, replace the fork cylinder ring with a new one.
REASSEMBLY AND REMOUNTING
Reassemble and remount the front fork in the reverse order of
removal and disassembly. Pay special attention to the following
points:
ANTIFRICTION METALS, OIL SEAL, AND DUST SEAL
Hold the inner tube vertically, clean the metal groove, and
install the inner tube slide metal by hand.
Do not damage the Teflon coated surface of the inner tube antifriction metal when mounting the inner
tube.
Apply fork oil to the inner tube and outer tube
antifriction metals.
Apply front fork oil to the lip of oil seal lightly before installing
it.
1
99000-99001-SS5: SUZUKI FORK OIL SS-05
Install the oil lock piece 1, outer tube antifriction metal 2, oil
seal retainer 3, and oil seal 4 onto the inner tube.
23
3
4
3
CHASSIS
Insert the inner tube into the outer tube and install the oil seal
using the special tool.
09940-52861: Front fork oil seal installer set
Install the oil seal stopper ring.
Make sure that the oil seal stopper ring is fitted securely.
DAMPER ROD BOLT
Tighten the front fork damper rod bolt to the specified torque
using the special tool.
09940-54821: Front fork inner rod holder
Frant fork damper rod bolt: 80 N·m (8.0 kgf-m, 58.0 lb-ft)
Use a new O-ring to prevent oil leakage.
FORK OIL
Place the front fork vertically without the spring.
Pour the specified fork oil into the inner tube.
99000-99001-SS5: SUZUKI FORK OIL SS-05
Standard fork oil capacity (each leg):
720 ml (24.3 US oz, 25.4 Imp oz)
Move the inner tube and inner rod slowly several times.
Hold the front fork in a vertical position and adjust the fork oil
level using the special tool.
09943-74111: Fork oil level gauge
Fork oil level
Standard: 122 mm (4.8 in)
NOTE:
Before adjusting the oil level, remove the fork spring and compress the inner tube fully.
6-15
6-16
CHASSIS
PISTON ROD LOCKNUT AND FORK SPRING
Install the piston rod locknut to the lowest position.
Install the fork spring.
NOTE:
The end of the fork spring with the smaller inside diameter should
be at the bottom of the front fork.
Install a washer 1.
Pull up the piston rod using the special tool.
09940-52841: Front fork inner rod holder
Compress the spring and then insert the special tool between
the locknut and washer.
Slowly turn the cap bolt by hand until it is seated on the locknut.
Tighten the locknut to the specified torque while holding the
cap bolt.
09940-94922: Front fork stopper plate
Front fork inner rod locknut:
22 N·m (2.2 kgf-m, 16.0 lb-ft)
NOTE:
Before installing the cap bolt turn the rebound damping force
adjuster to the softest position.
1
CHASSIS
When remounting the front fork, align the groove 1 of the
inner tube with the upper surface 2 of the steering stem upper bracket.
1
A
NOTE:
Make sure that the air valve A is at the front position when installing the front fork.
2
Tighten the front fork lower clamp bolts 1, front fork cap bolt 2,
and front fork upper clamp bolts 3 to the specified torque.
Front fork lower clamp bolt: 32 N·m (3.2 kgf-m, 23.0 lb-ft)
Front fork upper clamp bolt: 30 N·m (3.0 kgf-m, 21.5 lb-ft)
Front fork cap bolt:
23 N·m (2.3 kgf-m, 16.5 lb-ft)
2
3
1
FRONT WHEEL .........................................................
6-5
NOTE:
Before tightening the front axle nut and front axle pinch bolts,
move the front fork up and down four or five times.
SUSPENSION SETTING
After installing the front fork, adjust the rebound damping force
and compression damping force as follows.
Fully turn the damping force adjuster clockwise to the hard setting position, and then turn it out to the standard setting position.
6-17
A
Standard setting position
Rebound damping force adjuster A:
15 clicks out
Compression damping force adjuster B:
12 clicks out
B
6-18
CHASSIS
STEERING
CONSTRUCTION
1
2
3
4
5
6
7
8
Handlebar
Washer
Handlebar clamp
Steering stem head bracket
Steering stem nut
Bearing
Steering stem
Bearing
A
B
C
D
Handlebar clamp bolt
Steering stem head nut
Front fork upper clamp bolt
Front fork lower clamp bolt
ITEM
A
B
C
D
N·m
23
90
30
32
kgf-m
2.3
9.0
3.0
3.2
lb-ft
16.5
65.0
21.5
23.0
CHASSIS
6-19
REMOVAL AND DISASSEMBLY
Remove the front fork. (
6-11)
Remove the master cylinder assembly. (
Remove the front brake hose guide bolts.
6-51)
Remove the odometer assembly.
Remove the clamps 1 and engine stop switch 2.
2
1
Disconnect the main switch coupler 3 , starter button
coupler 4 (DR-Z400E), and clutch lever position switch lead
wires 5 (DR-Z400E).
3 4
5
Remove the throttle cables 6 and throttle grip 7.
6
7
3
6-20
CHASSIS
- Disconnect the clutch cable.
Disconnect the decompression cable. (DR-Z400)
Remove the front fender.
Remove the handlebar 1 and ignition switch 2 (DR-Z400E).
2
Remove the steering stem head nut.
1
CHASSIS
Remove the washer 1 and steering stem upper bracket 2.
Remove the steering stem nut using the special tools.
09940-14911: Steering nut socket wrench
09940-14960: Steering nut wrench socket
Remove the steering stem lower bracket.
NOTE:
Hold the steering stem lower bracket to prevent it from falling.
Remove the steering stem upper bearing.
INSPECTION
Inspect the removed parts for the following abnormalities. If any
damages are found, replace the respective part with a new one.
Steering race wear and brinelling.
Bearing wear or damage.
Abnormal bearing noise.
Distortion of steering stem or handlebar.
Remove the steering stem lower bearing using a chisel.
Replace the removed bearing with a new one.
1
2
6-21
6-22
CHASSIS
Drive out the steering stem upper and lower bearing races
using the special tools.
09941-54911: Bearing outer race remover
09941-74910: Bearing installer
REASSEMBLY AND REMOUNTING
Reassemble and remount the steering stem in the reverse order
of removal and disassembly. Pay attention to the following points.
BEARING RACES
Press in the upper and lower bearing races using the special
tools.
09924-84510: Bearing installer set
09941-34513: Steering race installer
BEARINGS
Press in the steering stem lower bearing using the special
tool.
09925-18010: Steering bearing installer
Apply SUZUKI SUPER GREASE “A” to the steering stem
upper and lower bearings.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
STEERING STEM
Tighten the steering stem nut to the specified torque using
the special tools.
09940-14911: Steering nut socket wrench
09940-14960: Steering nut wrench socket
Steering stem nut: 45 N·m (4.5 kgf-m, 32.5 lb-ft)
CHASSIS
6-23
Turn the steering stem lower bracket about five or six times to
the left and right so that the bearings seat properly.
Loosen the steering stem nut 1/4-1/2 of a turn A.
NOTE:
This adjustment will vary from motorcycle to motorcycle.
Tighten the steering stem head nut to the specified torque.
Steering stem head nut: 90 N·m (9.0 kgf-m, 65.0 lb-ft)
NOTE:
Before tightening the steering stem head nut, temporarily install
the front forks.
HANDLEBAR
When setting the handlebar clamp to the handlebar holder of
the steering upper bracket, face the punched mark 1 on its clamp
forward.
Set the handlebar to match its punched mark 2 to the mating
face of the handlebar clamp.
First, tighten the handlebar clamp bolts 3 to the specified
torque, and then tighten the handlebar clamp bolts 4 to the
specified torque.
Handlebar clamp bolt: 23 N·m (2.3 kgf-m, 16.5 lb-ft)
CLUTCH CABLE AND THROTTLE CABLES
Apply SUZUKI SUPER GREASE “A” to the end of clutch cable
and throttle cables.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
3 1
2
2
Forward
4
6-24
CHASSIS
FRONT WHEEL .........................................................
6-5
WIRE HARNESS, CABLE,
AND HOSE ROUTING ................................
8-12 to 8-18
NOTE:
Hold the front fork legs, move them back and forth and make
sure that the steering is not loose.
After performing the adjustment and installing the
handlebars, “rock” the front wheel assembly forward
and backward to ensure that there is no play and that
the procedure was accomplished correctly. Finally,
check to make sure that the steering stem moves freely
from left to right with its own weight. If play or stiffness
is noticeable, readjust the steering stem nut.
CHASSIS
REAR WHEEL
CONSTRUCTION
1
2
3
4
5
6
7
8
9
0
A
B
C
D
E
Cotter pin (For E-03, 28)
Washer
Chain adjuster
Brake disc
Spacer
Dust seal
Bearing
Rear wheel
Rear sprocket
Spacer
Bearing
Bearing
Dust seal
Spacer
Rear axle
A Rear axle nut
B Brake disc mounting bolt
C Rear sprocket nut
ITEM
A E-03, 28
Others
B
C
N·m
100
110
10
30
kgf-m
10.0
11.0
1.0
3.0
lb-ft
72.5
75.5
7.0
21.5
6-25
6-26
CHASSIS
Left
Right
(Except E-03, 28)
Left
Right
Left
Right
Spacer
Clearance
CHASSIS
REMOVAL AND DISASSEMBLY
Remove the cotter pin. (E-03, 28)
Remove the rear axle nut.
Replace the removed cotter pin with a new one.
Support the motorcycle with a jack or wooden block and remove the rear axle 1 and rear wheel.
1
Do not operate the brake pedal during or after rear
wheel removal.
Remove the spacers.
Remove the rear sprocket.
Remove the brake disc.
6-27
6-28
CHASSIS
INSPECTION
REAR SPROCKET
Inspect the rear sprocket for wear and damage. If any damages
are found, replace the sprocket and drive chain as a set.
È Normal wear
É Excessive wear
WHEEL HUB DUST SEALS ......................................
6-6
WHEEL BEARINGS .....................................
6-6 and 6-7
REAR WHEEL ...........................................................
6-7
REAR AXLE ...............................................................
6-7
REASSEMBLY AND REMOUNTING
Reassemble and remount the rear wheel in the reverse order
of removal and disassembly. Pay special attention to the following points:
WHEEL BEARINGS
Apply SUZUKI SUPER GREASE “A” to the wheel bearings.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
Install the wheel bearings using the special tool.
09941-34513: Bearing installer set
First, install the right wheel bearing, and then install
the left wheel bearings. The sealed cover on the wheel
bearing must face out. (
6-26)
CHASSIS
6-29
WHEEL HUB DUST SEALS
Apply SUZUKI SUPER GREASE “A” to the wheel hub dust
seals.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
Install the wheel hub dust seals using the special tool.
09913-70210: Bearing installer set
After installing the right and left spacers to the rear
wheel, inspect the lip of dust seals properly positioned.
BRAKE DISC
Make sure that the brake disc is clean and free of any grease.
Apply THREAD LOCK SUPER “1360” to the brake disc mounting bolts, and then tighten them to the specified torque.
99000-32130: THREAD LOCK SUPER “1360”
Brake disc mounting bolt: 10 N·m (1.0 kgf-m, 7.0 lb-ft)
REAR SPROCKET
Tighten the rear sprocket nuts to the specified torque.
Rear sprocket nut: 30 N·m (3.0 kgf-m, 21.5 lb-ft)
NOTE:
The stamped mark A on the rear sprocket should face to the
outside.
A
6-30
CHASSIS
REAR WHEEL
Adjust the drive chain slack after installing the rear wheel
axle. (
2-16 and 2-17)
Tighten the rear axle nut to the specified torque.
Rear axle nut:
100 N·m (10.0 kgf-m, 72.5 lb-ft).. for E-03, 28
110 N·m (11.0 kgf-m, 79.5 lb-ft).. for the other countries
NOTE:
After installing the rear axle nut, insert a new cotter pin into
the rear axle. (E-03, 28)
After remounting the rear wheel, pump the brake pedal a few
times to check for proper brake operation.
CHASSIS
REAR SUSPENSION
CONSTRUCTION
1
2
3
4
5
6
7
8
9
0
A
Rear shock absorber
Spring adjuster
Spring
Spring seat
Circlip
Cushion lever rod
Cushion lever
Swingarm pivot shaft
Swingarm
Chain guide
Chain buffer
A Rear shock absorber nut
B Rear shock absorber compression
adjuster assembly
C Rear shock absorber spring adjuster
lock ring
D Cushion rod mounting nut
E Cushion lever mounting nut
F Cushion lever mounting nut
G Swingarm pivot nut
ITEM
A
B
C
D, E
F
G
N·m
55
30
90
100
100
77
kgf-m
5.5
3.0
9.0
10.0
10.0
7.7
lb-ft
40.0
21.5
65.0
72.5
72.5
55.5
6-31
6-32
CHASSIS
A
A
D
B
C
F
D C
B
E
E
ITEM
A
B
C
D
E
F
N·m
55
55
100
100
100
77
kgf-m
5.5
5.5
10.0
10.0
10.0
7.7
F
lb-ft
40.0
40.0
72.5
72.5
72.5
55.5
CHASSIS
REAR SHOCK ABSORBER REMOVAL
Remove the muffler. (
3-5)
Remove the battery. (DR-Z400E) (
Remove the clamps.
7-30)
Disconnect the taillight coupler 1, starter relay coupler 2
(DR-Z400E), and starter relay lead wires 3 (DR-Z400E).
1
2
3
Disconnect the air cleaner breather hose and loosen the carburetor clamp.
Remove the seat rail with air cleaner case assembly.
Support the motorcycle with a jack or wooden block and remove the rear shock absorber.
6-33
6-34
CHASSIS
Loosen the lockring 1 and turn the adjuster 2 using the
special tool.
2
09910-60611: Universal clamp wrench
1
Remove the circlip 3, spring seat 4, and spring 5.
5
4
3
CHASSIS
REAR SHOCK ABSORBER INSPECTION
AND DISASSEMBLY
Inspect the rear shock absorber for damage and oil leakage. If
any damages are found, replace the spring or rear shock absorber with a new one.
REAR SHOCK ABSORBER DISPOSAL
The rear shock absorber unit contains high-pressure
nitrogen gas.
Mishandling can cause explosion.
Keep away from fire and heat. High gas pressure
caused by heat can cause an explosion.
Release gas pressure before disposing.
GAS PRESSURE RELEASE
Remove the valve cap.
Press the valve with a screwdriver to bleed out the nitrogen gas.
Releasing high pressure gas from the rear shock absorber unit can be hazardous. Never perform any servicing until the nitrogen gas pressure has been released from the rear shock absorber unit.
When releasing the gas pressure, place a rag over
the gas valve and use the tip of a screwdriver to press
the valve. Do not use your finger to depress the gas
valve, and be sure to direct the valve away from your
face and body.
Be sure to always wear eye protection when performing this procedure.
6-35
6-36
CHASSIS
OIL REPLACEMENT PROCEDURE
TOOLS AND EQUIPMENT
The following tools and equipment are required to perform oil replacement.
1
3
5
8
7
9
4
SERVICE
MANUAL
6
1
2
3
4
5
6
7
8
9
*
Screwdriver or small punch
Vise*
Drain pan
Specified shock oil (SS-25)
Rags
Nitrogen tank
Filler hose and nozzle
Regulator assembly
Service manual
Not shown in the illustration
OIL REPLACEMENT
Remove the rear shock absorber unit from the frame (
6-33), and then clean and dry it.
Remove the spring from the rear shock absorber unit. (
6-34)
NOTE:
Inspect the rear shock absorber unit for oil leakage.
Be sure to fully turn the rebound damping force adjusting screw
counterclockwise, so that the rear suspension oil can be
poured out easily.
Remove the valve cap, and then press the valve with a screwdriver to bleed out nitrogen gas.
Releasing high pressure gas from the rear shock absorber unit can be hazardous. Never perform any servicing until the nitrogen gas pressure has been released from the rear shock absorber unit.
When releasing the gas pressure, place a rag over
the gas valve and use the tip of a screwdriver to press
the valve. Do not use your finger to depress the gas
valve, and be sure to direct the valve away from your
face and body.
Be sure to always wear eye protection when performing this procedure.
Remove the compression adjuster assembly 1 and the orifice 2 from the rear shock absorber.
1
2
CHASSIS
Move the rod and drain the oil completely into a drain pan.
Push the valve core again to equalize atmospheric pressure.
Fill a drain pan with the specified rear suspension oil.
Place the rear shock absorber into the drain pan so that the
drain hole is submerged in the oil, and then fill the rear shock
absorber with the oil by stroking the rod.
99000-99001-S25:
SUZUKI REAR SUSPENSION OIL SS-25
Oil capacity:
Approximately 380 ml (12.8 US oz, 13.4 lmp oz)
When fitting the orifice in the compression adjuster hole, face
the conical side to the valve side.
Tighten the compression adjuster assembly to the specified
torque.
Replace the remove O-rings with new ones.
Compression adjuster assembly:
30 N·m (3.0 kgf-m, 21.5 lb-ft)
Fill the rear shock absorber unit with nitrogen gas.
Rear shock absorber gas pressure:
900 kPa (9.0 kgf/cm2, 128 psi)
Tighten the gas valve cap.
Use of flammable gas for pressuring the rear shock
absorber unit can be hazardous. Flammable gas such
as gas welding oxygen can create a fire hazard.
Use nitrogen gas. If nitrogen gas is not available,
compressed air free from water can be substituted.
Applying too much pressure to the rear shock absorber unit may rupture the rear shock absorber unit.
Be sure to fill the rear shock absorber unit to the
specified pressured.
6-37
6-38
CHASSIS
Riding the motorcycle with abnormal gas pressure can
damage the rear shock absorber unit. Low gas pressure can result in oil leakage. Abnormal gas pressure
cannot provide normal performance of the rear shock
absorber.
Be sure to fill the rear shock absorber unit to the specified pressure.
REAR SHOCK ABSORBER REASSEMBLY
AND REMOUNTING
Reassemble and remount the rear shock absorber in the reverse
order of removal and disassembly. Pay special attention to the
following points:
Install the spring, spring seat, and circlip.
Turn the adjuster 1 to obtain the spring length A of
258.0 mm (10.16 in).
Tighten the lock ring 2 to the specified torque.
Rear shock absorber lock ring:
90 N·m (9.0 kgf-m, 65.0 lb-ft)
SPRING SETTING TABLE
Standard
258.0 mm
(10.16 in)
Spring preset length
Soft
259.5 mm
(10.22 in)
Hard
247.5 mm
(9.74 in)
Do not set the spring less than 247.5 mm (9.74 in).
A
2 1
CHASSIS
6-39
Tighten the rear shock absorber upper and lower mounting
nut to the specified torque.
Rear shock absorber upper and lower mounting nut:
55 N·m (5.5 kgf-m, 40.0 lb-ft)
Apply THREAD LOCK SUPER “1303” to the seat rail lower
mounting bolt 4.
3
99000-32030: THREAD LOCK SUPER “1303”
Tighten the seat rail upper mounting nut 3 and lower mounting bolts 4 to the specified torque.
4
Seat rail upper mounting nut:
35 N·m (3.5 kgf-m, 25.5 lb-ft)
Seat rail lower mounting bolt:
35 N·m (3.5 kgf-m, 25.5 lb-ft)
REAR SHOCK ABSORBER DAMPING
FORCE ADJUSTMENT
A
After installing the rear suspension, adjust the rebound damping force and compression damping force as follows.
Fully turn the damping adjuster clockwise to the hard setting
position, and then turn it out to the standard setting position.
Standard setting position:
Compression damping force adjuster A:
12 clicks out
Rebound damping force adjuster B:
13 clicks out
B
6-40
CHASSIS
REAR SWINGARM AND CUSHION LEVER
REMOVAL
Remove the rear wheel. (
6-27)
Remove the rear shock absorber. (
6-33 and 6-34)
Remove the rear brake caliper. (
6-57)
Remove the drive chain guide.
Disconnect the brake hose from the brake hose guide.
Remove the cushion lever mounting bolt and nut.
Remove the swingarm pivot shaft nut and pivot shaft.
Remove the rear suspension assembly.
Remove the chain buffer 1 and brake hose guide 2.
2
1
CHASSIS
Remove the cushion lever 1 and cushion lever rods 2.
2
1
INSPECTION AND DISASSEMBLY
SPACERS
Remove the dust seals, washers and spacers from the
swingarm and cushion lever.
Inspect the spacers for any flaws or other damage. If any damages are found, replace the spacers with new ones.
Replace the removed dust seals with new ones.
CHAIN BUFFER
Inspect the chain buffer for wear and damage. If any damages
are found, replace the chain buffer with a new one.
SWINGARM NEEDLE BEARINGS
Insert the spacers into the needle bearings, move the spacer up
and down and check for any play. If there is excessive play, replace the bearings with new ones.
Remove the swingarm needle bearings using the special
tools.
09923-74510: Bearing remover
09930-30102: Sliding hammer
Replace the removed needle bearings with new ones.
6-41
6-42
CHASSIS
SWINGARM
Inspect the swingarm for damage. If any damages are found,
replace the swingarm with a new one.
CUSHION LEVER NEEDLE BEARINGS
Insert the spacers into the needle bearings, move the spacer up
and down and check for any play. If there is excessive play, replace the bearings with new ones.
Remove the cushion lever needle bearings using the special
tools.
09923-73210: Bearing remover
09930-30102: Sliding hammer
Replace the removed needle bearings with new ones.
CUSHION LEVER AND CUSHION LEVER RODS
Inspect the cushion lever and cushion lever rods for damage. If
any damages are found, replace the cushion lever and cushion
lever rods with new ones.
PIVOT SHAFT
Measure the pivot shaft runout using the dial gauge. If the runout
exceeds the service limit, replace the pivot shaft.
09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09900-21304: V-block set (100 mm)
Swingarm pivot shaft runout
Service Limit: 0.3 mm (0.01 in)
CHASSIS
REASSEMBLY AND REMOUNTING
Reassemble and remount the rear suspension in the reverse
order of removal and disassembly. Pay special attention to the
following points:
SWINGARM NEEDLE BEARINGS
Apply SUZUKI SUPER GREASE “A” to the spacers, dust seals
and needle bearings.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
Press the needle bearings into the swingarm pivot using the
special tool.
09941-34513: Steering outer race installer
CUSHION LEVER NEEDLE BEARINGS
Apply SUZUKI SUPER GREASE “A” to the spacers and
needle bearings.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
92P60960
Press the needle bearings into the cushion lever using the
special tool.
09941-34513: Steering outer race installer
REAR SUSPENSION
Tighten the cushion lever rod mounting nuts 1 to the specified torque.
Cushion lever rod mounting nut:
100 N·m (10.0 kgf·m, 72.5 lb-ft)
92P60970
1
6-43
6-44
CHASSIS
Tighten the swingarm pivot shaft nut to the specified torque.
Pivot shaft nut: 77 N·m (7.7 kgf-m, 55.5 lb-ft)
Tighten the cushion lever mounting nut to the specified torque.
Cushion lever mounting nut:
100 N·m (10.0 kgf·m, 72.5 lb-ft)
FINAL INSPECTION AND ADJUSTMENT
After installing the rear wheel, adjust the following before riding.
Drive chain ...................................................
2-16 to 2-17
Tire pressure ..........................................................
2-22
CHASSIS
6-45
FRONT BRAKE
CONSTRUCTION
1
2
3
4
5
6
7
8
9
0
Cap
Diaphragm
Master cylinder
Piston set
Brake hose
Caliper holder
Caliper
Pad set
Piston
Piston and dust seal
A
B
C
D
E
F
G
H
Master cylinder mounting bolt
Brake hose union bolt
Air bleeder valve
Brake caliper mounting bolt
Brake pad mounting pin
Plug
Caliper axle
Caliper axle
ITEM
A
B
C
D
E
F
G
H
N·m
10
23
7.5
26
18
2.5
23
13
kgf-m
1.0
2.3
0.75
2.6
1.8
0.25
2.3
1.3
lb-ft
7.0
16.5
5.5
19.0
13.0
1.8
16.5
9.5
The brake system is filled with an glycol-based brake fluid, which is classified DOT 4. Do not
use or mix other types of brake fluid, such as silicone-based and petroleum-based brake
fluids when refilling the brake system, otherwise serious damage to the brake system will
result.
Do not use any brake fluid taken from old, used, or unsealed containers.
Do not reuse brake fluid left over from the last servicing or which has been stored for a long
period of time.
When storing brake fluid, make sure to seal the container completely and keep it out of the
reach of children.
When replenishing brake fluid, make sure not to get any dust or other foreign materials in the
fluid.
When washing brake components, always use new brake fluid. Do not use cleaning solvent.
A contaminated brake disc or brake pad reduces braking performance. Discard contaminated pads and clean the brake disc with high-quality brake cleaner or a neutral detergent.
Handle brake fluid with care: the fluid reacts chemically with paint, plastics, rubber
material, etc.
6-46
CHASSIS
BRAKE PAD REPLACEMENT
Remove the brake pad mounting pin.
Remove the brake pads.
Do not operate the brake lever during or after brake
pad removal.
Replace the brake pads as a set, otherwise braking
performance will be adversely affected.
Install the new brake pads.
Make sure that the brake pad is properly engaged with
the guide plate as shown in the photograph.
Tighten the brake pad mounting pin to the specified torque.
Brake pad mounting pin: 18 N·m (1.8 kgf-m, 13.0 lb-ft)
NOTE:
After replacing the brake pads, pump the brake lever a few times
to check for proper brake operation and then check the brake
fluid level.
CHASSIS
6-47
BRAKE FLUID REPLACEMENT
Place the motorcycle on a level surface and keep the handlebar straight.
Remove the master cylinder reservoir cap and diaphragm.
Remove as much old brake fluid as possible.
Fill the reservoir with new brake fluid.
Specification and classification: DOT 4
Connect a clear hose to the air bleeder valve and insert the
other end of the hose into a receptacle.
Loosen the air bleeder valve and pump the brake lever until
the old brake fluid is completely out of the brake system.
Close the air bleeder valve and disconnect the clear hose. Fill
the reservoir with new brake fluid to the upper end of the inspection window.
Bleed air from the brake system.
(
2-19 and 2-20)
BRAKE CALIPER REMOVAL AND
DISASSEMBLY
Disconnect the brake hose from the brake caliper by removing the brake hose union bolt 1 and allow the brake fluid to
drain into a suitable receptacle.
Remove the brake caliper by removing the brake caliper
mounting bolts 2.
Never reuse the brake fluid left over from previous
servicing or which has been stored for long period
of time, otherwise serious damage to the brake system will result.
Brake fluid, if it leaks, will interfere with safe running
and discolor painted surfaces. Check the brake hose
and hose joints for cracks and oil leakage.
2
1
6-48
CHASSIS
Remove the brake pads. (
6-46)
Remove the brake caliper holder.
Remove the spring.
Place a rag over the brake caliper pistons to prevent them
from popping out, and then force out the pistons using compressed air.
Do not use extremely high pressure air to remove the
brake caliper pistons, otherwise damage to the pistons
will result.
Remove the dust seals and piston seals.
Do not reuse the dust seals and piston seals to prevent fluid leakage.
BRAKE CALIPER INSPECTION
BRAKE CALIPER
Inspect each brake caliper cylinder wall for nicks, scratches or
other damage. If any damages are found, replace the brake caliper with a new one.
BRAKE CALIPER PISTONS
Inspect the brake caliper pistons for any scratches or other damage. If any damages are found, replace the piston with a new
one.
CHASSIS
RUBBER PARTS
Replace the removed rubber parts with new ones.
BRAKE CALIPER REASSEMBLY AND
REMOUNTING
Reassemble and remount the brake caliper in the reverse order
of removal and disassembly. Pay special attention to the following points:
Wash the caliper bores and pistons with the specified brake
fluid. Thoroughly wash the dust seal grooves and piston seal
grooves.
Specification and classification: DOT 4
Wash the brake caliper components with new brake
fluid before reassembly.
Do not wipe the brake fluid off after washing the components.
When washing the components, use the specified
brake fluid. Never use different types of fluid or cleaning solvents such as gasoline, kerosine, etc.
Replace the removed piston seals and dust seals
with new ones.
Apply brake fluid to all of the seals, brake caliper
bores and pistons before reassembly.
PISTON SEALS
Install the piston seals 1 and dust seals 2 as shown.
BRAKE CALIPER HOLDER
Apply SUZUKI SILICON GREASE to the brake caliper holder.
99000-25100: SUZUKI SILICONE GREASE
6-49
6-50
CHASSIS
Tighten the brake pad mounting pin 1, brake caliper mounting bolts 2, and brake hose union bolt 3 to the specified
torque.
Brake pad mounting pin: 18 N·m (1.8 kgf-m, 13.0 lb-ft)
Brake caliper mounting bolt:
26 N·m (2.6 kgf-m, 19.0 lb-ft)
Brake hose union bolt:
23 N·m (2.3 kgf-m, 16.5 lb-ft)
NOTE:
Before remounting the brake caliper, push the brake caliper pistons all the way into the caliper.
Bleed air from the system after reassembling the brake
caliper. (
2-19 and 2-20)
BRAKE DISC INSPECTION
Check the brake disc for cracks or damage and measure the
thickness using the micrometer. If any damages are found or if
the thickness is less than the service limit, replace the brake
disc with a new one.
09900-20205: Micrometer (0 – 25 mm)
Brake disc thickness
Service Limit: 2.5 mm (0.098 in)
Measure the runout using the dial gauge. If the runout exceeds
the service limit, replace the brake disc with a new one.
09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
Brake disc runout
Service Limit: 0.3 mm (0.012 in)
If either measurement exceeds the service limit, replace the
brake disc with a new one. (
6-5)
2
1
3
CHASSIS
6-51
MASTER CYLINDER REMOVAL AND
DISASSEMBLY
Place a rag underneath the brake hose union bolt on the
master cylinder to catch any spilt brake fluid. Remove the brake
hose union bolt and disconnect the brake hose.
Immediately wipe off any brake fluid contacting any part
of the motorcycle.The brake fluid reacts chemically with
paint, plastics, rubber materials, etc., and will damage
them severely.
Remove the master cylinder assembly.
Remove the brake lever cover 1 and brake lever 2.
1
2
Remove the reservoir cap 3 and diaphragm 4.
Drain the brake fluid.
4
3
Pull the dust boot 5 out and remove the circlip 6.
5
6
6-52
CHASSIS
Remove the piston assembly.
MASTER CYLINDER INSPECTION
MASTER CYLINDER
Inspect the master cylinder bore for any scratches or damage. If
any damages are found, replace the master cylinder with a new
one.
PISTON AND RUBBER PARTS
Inspect the piston surface, primary/secondary cup, and dust boot
for any scratches, wear or damage. If any damages are found,
replace the piston set with a new one.
MASTER CYLINDER REASSEMBLY AND
REMOUNTING
Reassemble and remount the master cylinder in the reverse order of removal and disassembly. Pay special attention to the following points:
Wash the master cylinder components with new
brake fluid before reassembly.
Do not wipe the brake fluid off after washing the components.
When washing the components, use the specified
brake fluid. Never use different types of fluid or cleaning solvents such as gasoline, kerosine, etc.
Apply brake fluid to the master cylinder bore and all
of the master cylinder components before reassembly.
Specification and classification: DOT 4
CHASSIS
When remounting the master cylinder on the handlebar, align
the master cylinder holder’s mating surface 1 with the punch
mark 2 on the handlebar, and then tighten the upper clamp
bolt first.
Master cylinder clamp bolt: 10 N·m (1.0 kgf-m, 7.0 lb-ft)
A
B
C
D
Master cylinder
Master cylinder upper clamp bolt
Handlebar
Clearance
Tighten the brake hose union bolt to the specified torque.
Brake hose union bolt: 23 N·m (2.3 kgf-m, 16.5 lb-ft)
Bleed air from the brake system after reassembling the
master cylinder. (
2-19 and 2-20)
1
2
6-53
6-54
CHASSIS
REAR BRAKE
CONSTRUCTION
1
2
3
4
5
6
7
8
9
0
A
B
Cap
Diaphragm
Master cylinder
Piston set
Brake hose
Reservoir cover
Caliper cover
Caliper
Caliper holder
Piston and dust seal
Piston
Pad set
A
B
C
D
E
F
G
H
Master cylinder mounting bolt
Brake hose union bolt
Rear brake rod locknut
Plug
Brake pad mounting pin
Caliper axle
Air bleeder valve
Caliper axle
ITEM
A
B
C
D
E
F
G
H
N·m
10
23
18
2.5
18
28
7.5
13
kgf-m
1.0
2.3
1.8
0.25
1.8
2.8
0.75
1.3
lb-ft
7.0
16.5
13.0
1.8
13.0
20.0
5.5
9.5
The brake system is filled with an glycol-based brake fluid, which is classified DOT 4. Do not
use or mix other types of brake fluid, such as silicone-based and petroleum-based brake
fluids when refilling the brake system, otherwise serious damage to the brake system will
result.
Do not use any brake fluid taken from old, used, or unsealed containers.
Do not reuse brake fluid left over from the last servicing or which has been stored for a long
period of time.
When storing brake fluid, make sure to seal the container completely and keep it out of the
reach of children.
When replenishing brake fluid, make sure not to get any dust or other foreign materials in the
fluid.
When washing brake components, always use new brake fluid. Do not use cleaning solvent.
A contaminated brake disc or brake pad reduces braking performance. Discard contaminated pads and clean the brake disc with high-quality brake cleaner or a neutral detergent.
Handle brake fluid with care: the fluid reacts chemically with paint, plastics, rubber
materials, etc.
CHASSIS
BRAKE PAD REPLACEMENT
Remove the brake pad mounting pin.
Remove the brake pads.
Do not operate the brake pedal during or after brake
pad removal.
Replace the brake pads as a set, otherwise braking
performance will be adversely affected.
Install the new brake pads.
Make sure that the brake pad is properly engaged with
the guide plate as shown in the photograph.
Tighten the brake pad mounting pin to the specified torque.
Brake pad mounting pin: 18 N·m (1.8 kgf-m, 13.0 lb-ft)
NOTE:
After replacing the brake pads, pump the brake pedal a few times
to check for proper brake operation and then check the brake
fluid level.
6-55
6-56
CHASSIS
BRAKE FLUID REPLACEMENT
Remove the reservoir cover.
Remove the reservoir cap and diaphragm.
Replace the brake fluid. (
6-46)
Specification and classification: DOT 4
Bleed air from the brake system.
(
2-19 and 2-20)
CHASSIS
6-57
BRAKE CALIPER REMOVAL AND
DISASSEMBLY
Remove the rear wheel. (
6-27)
Disconnect the brake hose from the brake caliper by removing the brake hose union bolt and allow the brake fluid to drain
into a suitable receptacle.
Remove the brake caliper.
Never reuse the brake fluid left over from previous
servicing or which has been stored for long period
of time, otherwise serious damage to the brake system will result.
Brake fluid, if it leaks, will interfere with safe running
and discolor painted surfaces. Check the brake hose
and hose joints for cracks and oil leakage.
Remove the brake pads. (
6-55)
Remove the brake caliper cover 1 and brake disc cover 2.
1
2
Remove the brake caliper holder.
Remove the spring.
6-58
CHASSIS
Place a rag over the brake caliper piston to prevent them
from popping out and then force out the piston using compressed air.
Do not use extremely high pressure air to remove the
brake caliper piston, otherwise damage to the piston
will result.
Remove the dust seals and piston seals.
Do not reuse the dust seals and piston seals to prevent fluid leakage.
BRAKE CALIPER INSPECTION
BRAKE CALIPER ......................................................
BRAKE CALIPER PISTON ........................................
RUBBER PARTS .......................................................
6-48
6-48
6-49
BRAKE CALIPER REASSEMBLY AND
REMOUNTING
Reassemble and remount the brake caliper in the reverse order
of removal and disassembly. Pay special attention to the following points:
Wash the caliper bores and pistons with the specified brake
fluid. Thoroughly wash the dust seal grooves and piston seal
grooves.
Specification and classification: DOT 4
Wash the brake caliper components with new brake
fluid before reassembly.
Do not wipe the brake fluid off after washing the components.
When washing the components, use the specified
brake fluid. Never use different types of fluid or cleaning solvents such as gasoline, kerosine, etc.
Replace the removed piston seals and dust seals
with new ones.
Apply brake fluid to all of the seals, brake caliper
bores and pistons before reassembly.
CHASSIS
PISTON SEAL
Install the piston seal 1 and dust seal 2 as shown.
BRAKE CALIPER HOLDER
Apply SUZUKI SILICON GREASE to the brake caliper holder.
99000-25100: SUZUKI SILICONE GREASE
Tighten the brake hose union bolt to the specified torque.
Brake hose union bolt: 23 N·m (2.3 kgf-m, 16.5 lb-ft)
NOTE:
Before remounting the rear wheel, push the brake caliper pistons all the way into the caliper.
Bleed air from the system after remounting the rear
wheel. (
2-19 and 2-20)
BRAKE DISC INSPECTION
BRAKE DISC .............................................................
6-50
6-59
6-60
CHASSIS
MASTER CYLINDER REMOVAL AND
DISASSEMBLY
Remove the reservoir cover. (
6-56)
Remove the reservoir mounting bolt.
Place a rag underneath the brake hose union bolt on the
master cylinder to catch any spilt brake fluid. Remove the brake
hose union bolt and disconnect the brake hose.
Immediately wipe off any brake fluid contacting any part
of the motorcycle.The brake fluid reacts chemically with
paint, plastics, rubber materials, etc., and will damage
them severely.
Loosen the locknut 1 and remove the master cylinder assembly.
1
Remove the circlip 2 and reservoir assembly 3.
3
2
Pull the dust boot 4 out and remove the circlip 5.
5
4
CHASSIS
Remove the push rod 1 and piston assembly 2.
2
1
MASTER CYLINDER INSPECTION
MASTER CYLINDER .................................................
PISTON AND RUBBER PARTS ................................
6-52
6-52
MASTER CYLINDER REASSEMBLY AND
REMOUNTING
Reassemble and remount the master cylinder in the reverse order of removal and disassembly. Pay special attention to the following points:
Wash the master cylinder components with new
brake fluid before reassembly.
Do not wipe the brake fluid off after washing the components.
When washing the components, use the specified
brake fluid. Never use different types of fluid or cleaning solvents such as gasoline, kerosine, etc.
Apply brake fluid to the master cylinder bore and all
of the master cylinder components before reassembly.
Specification and classification: DOT 4
6-61
6-62
CHASSIS
Tighten the master cylinder mounting bolts 1, brake rod locknut 2, and brake hose union bolt 3 to the specified torque.
Master cylinder mounting bolt:
10 N·m (1.0 kgf-m, 7.0 lb-ft)
Brake rod locknut:
18 N·m (1.8 kgf-m, 13.0 lb-ft)
Brake hose union bolt:
23 N·m (2.3 kgf-m, 16.5 lb-ft)
1
2
Bleed air from the brake system after reassembling the
master cylinder. (
2-19 and 2-20)
3
ELECTRICAL SYSTEM
7-1
ELECTRICAL SYSTEM
CONTENTS
CAUTIONS IN SERVICING ............................................................................. 7- 2
CONNECTORS ........................................................................................... 7- 2
COUPLERS ................................................................................................ 7- 2
CLAMPS ..................................................................................................... 7- 2
FUSE (DR-Z400E) ...................................................................................... 7- 2
SEMICONDUCTOR EQUIPPED PARTS .................................................... 7- 2
BATTERY (DR-Z400E) ................................................................................ 7- 3
CONNECTING THE BATTERY (DR-Z400E) ............................................... 7- 3
WIRING PROCEDURE ............................................................................... 7- 3
USING THE MULTI CIRCUIT TESTER ....................................................... 7- 4
LOCATION OF ELECTRICAL COMPONENTS .............................................. 7- 5
CHARGING SYSTEM (DR-Z400E) ................................................................. 7- 7
DESCRIPTION ............................................................................................ 7- 7
TROUBLESHOOTING ................................................................................ 7- 8
INSPECTION .............................................................................................. 7- 9
STARTER SYSTEM (DR-Z400E) .................................................................... 7-12
DESCRIPTION ............................................................................................ 7-12
TROUBLESHOOTING ................................................................................ 7-12
STARTER MOTOR REMOVAL AND DISASSEMBLY ................................ 7-13
STARTER MOTOR INSPECTION ............................................................... 7-14
STARTER MOTOR REASSEMBLY AND REMOUNTING .......................... 7-15
STARTER RELAY INSPECTION ................................................................ 7-16
IGNITION SYSTEM (DR-Z400) ....................................................................... 7-17
DESCRIPTION ............................................................................................ 7-17
TROUBLESHOOTING ................................................................................ 7-17
INSPECTION .............................................................................................. 7-19
IGNITION SYSTEM (DR-Z400E) .................................................................... 7-22
DESCRIPTION ............................................................................................ 7-22
TROUBLESHOOTING ................................................................................ 7-22
INSPECTION .............................................................................................. 7-24
ODOMETER .................................................................................................... 7-26
REMOVAL ................................................................................................... 7-26
LAMPS ............................................................................................................ 7-27
HEADLIGHT ............................................................................................... 7-27
TAILLIGHT .................................................................................................. 7-28
SWITCHES ..................................................................................................... 7-29
BATTERY (DR-Z400E) .................................................................................... 7-30
REMOVAL ................................................................................................... 7-30
SPECIFICATIONS....................................................................................... 7-30
SERVICING ................................................................................................. 7-30
RECHARGING OPERATION ...................................................................... 7-31
7
7-2
ELECTRICAL SYSTEM
CAUTIONS IN SERVICING
CONNECTORS
When disconnecting a connector, be sure to hold the terminals; do not pull the lead wires.
When connecting a connector, push it in so it is firmly attached.
Inspect the connector for corrosion, contamination and any
breakage in the cover.
COUPLERS
With a lock-type coupler, be sure to release the lock before
disconnecting it. When connecting a coupler, push it in until
the lock clicks shut.
When disconnecting a coupler, be sure to hold the coupler;
do not pull the lead wires.
Inspect each terminal on the coupler for looseness or bends.
Inspect each terminal for corrosion and contamination.
CLAMPS
Refer to the “WIRE HARNESS, CABLE, AND HOSE ROUTING” section for proper clamping procedures. (
8-12 to
8-18)
Bend the clamp properly, as shown in the illustration.
When clamping the wire harness, do not allow it to hang down.
Do not use wire or any substitutes for the band-type clamp.
FUSE (DR-Z400E)
When a fuse blows, always investigate the cause, correct the
problem, and then replace the fuse.
Do not use a fuse of a different capacity.
Do not use any substitutes for the fuse (e.g., wire).
SEMICONDUCTOR EQUIPPED PARTS
Do not drop any part that contains a semiconductor (e.g., CDI
unit, regulator/rectifier).
When inspecting the part, follow the inspection instructions
carefully. Neglecting proper procedures may cause this part
to be damaged.
ELECTRICAL SYSTEM
BATTERY (DR-Z400E)
The battery has been pre-filled with electrolyte so there is no
need to add fluid at any time.
The MF battery used in this motorcycle does not require maintenance (e.g., electrolyte level inspection, distilled water replenishment).
During normal charging, no hydrogen gas is produced. However, if the battery is overcharged, hydrogen gas may be produced. Therefore, make sure that there are no fire or spark
sources (e.g., short circuit) nearby when charging the battery.
Be sure to recharge the battery in a well-ventilated and open
area.
Note that the charging system for the MF battery is different
from that of a conventional battery. Do not replace the MF
battery with a conventional battery.
CONNECTING THE BATTERY (DR-Z400E)
When disconnecting terminals from the battery for disassembly or servicing, be sure to disconnect the - battery lead
wire, first.
When connecting the battery lead wires, be sure to connect
the + battery lead wire, first.
If the terminal is corroded, remove the battery, pour warm water
over it and clean it with a wire brush.
After connecting the battery, apply a light coat of grease to
the battery terminals.
Install the cover over the + battery terminal.
WIRING PROCEDURE
Properly route the wire harness according to the “WIRE HARNESS, CABLE, AND HOSE ROUTING” section. (
8-12 to
8-18)
7-3
7-4
ELECTRICAL SYSTEM
USING THE MULTI CIRCUIT TESTER
Properly use the multi circuit tester + and - probes. Improper
use can cause damage to the motorcycle and tester.
If the voltage and current values are not known, begin measuring in the highest range.
When measuring the resistance, make sure that no voltage is
applied. If voltage is applied, the tester will be damaged.
After using the tester, turn the switch to the “OFF” position.
Before using the multi circuit tester, read its instruction manual.
ELECTRICAL SYSTEM
LOCATION OF ELECTRICAL COMPONENTS
3
4
1
2
6
5
3
1
2
3
4
5
6
CDI unit
Ignition coil
Ignition switch (DR-Z400E)
Starter button (DR-Z400E)
Starter relay (DR-Z400E)
Condenser (DR-Z400)
7-5
7-6
ELECTRICAL SYSTEM
A
8
D
0
9
B
7
C
7
8
9
0
A
B
C
D
E
Engine stop switch
Clutch lever position switch (DR-Z400E)
Starter motor (DR-Z400E)
Regulator/rectifier
Fuse (DR-Z400E)
Battery (DR-Z400E)
Generator (DR-Z400E)
Throttle position sensor
Generator (DR-Z400)
E
ELECTRICAL SYSTEM
7-7
CHARGING SYSTEM (DR-Z400E)
DESCRIPTION
The charging system consists of a generator, regulator/rectifier, and battery. The AC current, which is generated by the generator, is converted by the regulator/rectifier into DC current. The regulator/rectifier is one
unit with two functions. The regulator prevents overcharging of the battery by grounding the excessive AC
current. The rectifier changes the AC current, which is produced by the generator, to the DC current.
All of these components work together to maintain a correct and constant voltage and to prevent the battery
from overcharging.
7-8
ELECTRICAL SYSTEM
TROUBLESHOOTING
Battery runs down quickly.
Check accessories which use excessive
amounts of electricity.
Accessories
are installed
• Remove accessories
No accessories
Check the battery for current leak7-9)
age. (
Current leaks
No current leaks
Measure the regulated voltage.
(
7-9 and 7-10)
Correct
• Short circuit of the wire
harness
• Loose or disconnected
wires
• Faulty battery
• Faulty battery
• Abnormal driving
condition
Incorrect
Check the continuity of the
7-10)
generator. (
No continuity
• Faulty stator coil or
disconnected lead
wires
Continuity
Inspect the generator no-load
performance. (
7-11)
Incorrect
• Faulty generator
Incorrect
• Faulty rectifier or
regulator/rectifier
Incorrect
• Short circuit of wire
harness
• Improper coupler
contact
Correct
Inspect the regulator/rectifier.
(
7-11)
Correct
Inspect the wires.
Correct
• Faulty battery
Others
Battery overcharges
• Faulty rectifier or regulator/rectifier
• Faulty battery
• Poor contact of generator lead wire coupler
ELECTRICAL SYSTEM
INSPECTION
BATTERY CURRENT LEAKAGE (DR-Z400E)
Turn the ignition switch to the “OFF” position.
Remove the battery cover. (
6-2)
Disconnect the - battery lead wire.
Measure the current between the - battery terminal and the battery lead wire using the multi circuit tester. If the reading exceeds the specified value, leakage is evident.
09900-25008: Multi circuit tester set
Tester knob indication: Current (
, 20mA)
Battery current (leak): Under 1mA
Because the current leak might be large, turn the
multi circuit tester to the high range, first to avoid
damage to the tester.
Do not turn the ignition switch to the “ON” position
when measuring the current.
When checking to find the excessive current leakage, remove
the couplers and connectors, one by one, checking each part.
REGULATED VOLTAGE (DR-Z400)
Start the engine and run the engine at 5 000 r/min.
Measure the DC voltage between the headlight terminals using
the multi circuit tester. If the tester reads without the specified
value, inspect the generator and regulator/rectifier. (
7-10
and 7-11)
09900-25008: Multi circuit tester set
Tester knob indication: Voltage (
)
Regulated voltage
Standard: 12.5 – 14.0 V at 5 000 r/min
_
+
B/W
O
(DC V)
Tester
7-9
7-10
ELECTRICAL SYSTEM
REGULATED VOLTAGE (DR-Z400E)
Remove the battery cover. (
6-2)
Start the engine and run the engine at 5 000 r/min.
Measure the DC voltage between the + and - battery terminals using the multi circuit tester. If the voltage is not within the
specified value, inspect the generator and regulator/rectifier.
(
7-10 and 7-11)
NOTE:
When performing this measurement, make sure that the battery
is fully charged.
09900-25008: Multi circuit tester set
Tester knob indication: Voltage (
)
Charging output (regulated voltage)
Standard: 13.5 – 15.0 V at 5 000 r/min
STATOR COIL RESISTANCE
Remove the left frame cover. (
6-2)
Disconnect the stator coil lead wire coupler.
Measure the resistance between the three lead wires using the
multi circuit tester. If the resistance is not within the specified
value, replace the stator coil with a new one.
Also, check that the generator core is insulated.
09900-25008: Multi circuit tester set
Tester knob indication: Resistance (Ω
Ω)
Stator coil resistance
Standard: 0.50 – 1.25 Ω (Yellow – Yellow)
∞
Ω (Yellow – Ground)
ELECTRICAL SYSTEM
7-11
AC GENERATOR NO-LOAD PERFORMANCE
Remove the left frame cover. (
6-2)
Disconnect the stator coil lead wire coupler.
Start the engine and run it at 5 000 r/min.
Measure the AC voltage between the lead wires of the generator using the multi circuit tester. If the voltage is under the specified value, replace the AC generator with a new one.
09900-25008: Multi circuit tester set
Tester knob indication: Voltage (~)
AC generator no-load performance
Standard:
More than 55 V (AC) at 5 000 r/min (DR-Z400)
More than 75 V (AC) at 5 000 r/min (DR-Z400E)
REGULATOR/RECTIFIER
Remove the left frame cover. (
6-2)
Disconnect the regulator/rectifier coupler.
Measure the voltage between the terminals using the multi circuit tester, as indicated in the table below. If the voltage is not
within the specified value, replace the regulator/rectifier with a
new one.
09900-25008: Multi circuit tester set
Tester knob indication: Diode test (
)
Unit: V
Y1
+ Tester probe
- Tester probe
O or R
O or R
B/W
0.5 – 1.2
B/W
1.4 – 1.5
Y1
Y2
0.4 – 0.7
0.4 – 0.7
0.4 – 0.7
1.4 – 1.5
1.4 – 1.5
1.4 – 1.5
1.4 – 1.5
Y1
1.4 – 1.5
0.4 – 0.7
1.4 – 1.5
0.4 – 0.7
1.4 – 1.5
Y3
1.4 – 1.5
0.4 – 0.7
1.4 – 1.5
B/W
Y3
1.4 – 1.5
Y2
Y2
1.4 – 1.5
1.4 – 1.5
O: Orange, R: Red, Y: Yellow, B/W: Black with White tracer
NOTE:
If the tester reads under 1.4 V, disconnect the tester probes from
the wire leads, and then replace the multi circuit tester’s battery.
Y3
OorR
7-12
ELECTRICAL SYSTEM
STARTER SYSTEM (DR-Z400E)
DESCRIPTION
The starter system consists of the following components: the starter motor, starter relay, clutch lever
position switch, starter button, ignition switch, and battery. Pressing the starter button energizes the starter
relay, causing the contact points to close, thus, completing the circuit from the starter motor to the battery.
The starter motor draws about 80 amperes to start the engine.
TROUBLESHOOTING
Starter motor will not run.
The transmission is in neutral. Turn the ignition
switch to the “ON” position. Grasp the clutch
lever. Listen for a click from the starter relay
when the starter button is pushed.
Clicks
Check if the starter motor runs
when its terminal is connected to
the
battery terminal (Do not use
a thin wire because a large amount
of current flows.)
Runs
Does not run
No click
• Faulty starter motor
Continued on next page
• Faulty starter relay
• Loose or disconnected starter
motor lead wire
ELECTRICAL SYSTEM
Measure the starter relay voltage at the
starter relay connectors (between Y/B
and B/W ) when the starter button is
pushed.
No voltage
Voltage
Inspect the starter relay.
(
7-16)
Incorrect
7-13
• Faulty ignition switch
• Faulty starter button
• Faulty clutch lever position
switch
• Improper connector contact
• Open circuit in wire harness
• Faulty starter relay
Correct
• Improper starter relay contact
Others
Engine does not turn though the
starter motor runs.
• Faulty starter clutch
STARTER MOTOR REMOVAL AND
DISASSEMBLY
Remove the exhaust pipe. (
3-5)
Remove the regulator/rectifier mounting bolt and clutch cable
guide mounting bolt.
Disconnect the starter motor lead wire.
Remove the starter motor.
7-14
ELECTRICAL SYSTEM
Disassemble the starter motor, as shown.
ITEM
A
N·m
5
kgf-m
0.5
lb-ft
3.5
STARTER MOTOR INSPECTION
CARBON BRUSHES
Inspect the carbon brushes for abnormal wear, cracks, or smoothness in the brush holder.
If any damages are found, replace the brush assembly with a
new one.
COMMUTATOR
Inspect the commutator for discoloration, abnormal wear or undercut A.
If abnormal wear is found, replace the armature with a new one.
If the commutator surface is discolored, polish it with #400 sandpaper and wipe it using a clean, dry cloth.
If there is no undercut, scrape out the insulator 1 with a saw
blade.
ARMATURE COIL INSPECTION
Check for continuity between each segment and between each
segment and the armature shaft using the multi circuit tester.
If there is no continuity between the segments or there is continuity between the segments and shaft, replace the armature
with a new one.
09900-25008: Multi circuit tester set
Tester knob indication: Continuity test (
)
ELECTRICAL SYSTEM
OIL SEAL
Check the seal lip for damage or leakage. If any damages are
found, replace the housing end (inside) of the starter motor with
a new one.
STARTER MOTOR REASSEMBLY AND
REMOUNTING
Reassemble and remount the starter motor in the reverse order
of removal and disassembly. Pay special attention to the following points:
Replace the removed O-rings with new ones to prevent oil leakage and moisture.
Apply SUZUKI SUPER GREASE “A” to the lip of the oil seal.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
Apply a small quantity of SUZUKI MOLY PASTE to the armature shaft.
99000-25140: SUZUKI MOLY PASTE
Align the match marks on the starter motor case with the match
mark on the housing end.
Apply a small quantity of THREAD LOCK “1342” to the starter
motor housing bolts.
99000-32050: THREAD LOCK “1342”
Apply SUZUKI SUPER GREASE “A” to the O-ring.
For USA
99000-25030: SUZUKI SUPER GREASE “A”
For the other countries
99000-25010: SUZUKI SUPER GREASE “A”
7-15
7-16
ELECTRICAL SYSTEM
STARTER RELAY INSPECTION
Remove the right frame cover. (
6-3)
Disconnect the starter motor lead wire, battery lead wire, and
starter relay coupler at the starter relay.
Remove the starter relay.
Apply 12 V to the terminals and check for continuity between
the positive and negative terminals using the multi circuit tester.
If the starter relay clicks and continuity is found, the relay is ok.
09900-25008: Multi circuit tester set
Tester knob indication: Continuity test (
)
Do not apply battery voltage to the starter relay for more
than five seconds, since the relay coil may overheat
and be damage.
Measure the relay coil resistance between the terminals using
the multi circuit tester. If the resistance is not within the specified
value, replace the starter relay with a new one.
09900-25008: Multi circuit tester set
Tester knob indication: Resistance (Ω
Ω)
Starter relay resistance
Standard: 3 – 5 Ω
ELECTRICAL SYSTEM
7-17
IGNITION SYSTEM (DR-Z400)
DESCRIPTION
In the capacitor discharged ignition system, the electrical energy generated by the generator charges the
capacitor. This energy is released in a single surge at the specified ignition timing point and the current flows
through the primary side of the ignition coil. A high voltage is induced in the secondary windings of the
ignition coil, resulting in a strong spark between the spark plug gap.
Ignition coil
DC-DC
converter
Regulator/
Rectifier
Condenser
Ignition power
source circuit
Generator
Wave form
arrangement
circuit
Throttle
position
sensor
CPU
Engine stop
switch
TROUBLESHOOTING
* Make sure the transmission is in the neutral position.
No spark or poor spark
Check the ignition system couplers for poor
connections.
Correct
Continued on next page
Loose
• Improper coupler
connection
7-18
ELECTRICAL SYSTEM
Measure the ignition coil primary peak
voltage. (
7-19)
NOTE: The ignition coil peak voltage
inspection method is applicable only with the
multi circuit tester and the peak volt adaptor.
Correct
Inspect the spark plug.
(
2-9)
Correct
Incorrect
Incorrect
• Faulty spark plug
• Improper spark plug
connection
Inspect the ignition coil. (
7-20)
Incorrect
• Faulty ignition coil
Correct
Measure the pickup coil and signal coil peak
voltage and resistance. (
7-20 and 7-21)
NOTE: The pickup coil and signal coil peak
voltage inspection is applicable only with the
multi circuit tester and the peak volt adaptor.
Incorrect
• Faulty pickup coil
• Faulty signal coil
Correct
• Faulty CDI unit
• Open circuit in wiring
harness.
• Improper ignition coupler
connection
ELECTRICAL SYSTEM
7-19
INSPECTION
IGNITION COIL PRIMARY PEAK VOLTAGE
Remove the fuel tank. (
4-2)
Remove the spark plug cap and spark plug.
Connect a new spark plug to spark plug cap and ground it to
the cylinder head.
NOTE:
Make sure that the spark plug cap and spark plug are connected
properly.
Do not let the spark plug touch the cylinder head cover,
otherwise the cylinder head cover may be damaged.
Measure ignition coil primary peak voltage using the multi circuit
tester in the following procedure.
Connect the multi circuit tester with the peak voltage adaptor
as follows.
Ignition coil:
Black/White terminal – Black/Yellow
(+ probe)
(- probe)
B/Y
NOTE:
Do not disconnect the ignition coil primary wire.
09900-25008: Multi circuit tester set
When using the multi circuit tester and peak volt adaptor, refer to the appropriate instruction manual.
Shift the transmission into neutral and set the engine stop
switch to the “RUN” position.
Pull the decompression lever.
Kick the kick starter lever and allow the engine to crank for a few
times, and then measure the ignition coil primary peak voltage.
Repeat the above procedure a few times and measure the
highest ignition coil primary peak voltage.
NOTE:
Be sure to remove the spark plug, first, and then kick the kick
starter lever.
Kick the kick starter lever as usual.
Tester knob indication: Voltage (
)
Ignition coil primary peak voltage: More than 150 V
While testing, do not touch the tester probes and spark
plug to prevent receiving an electric shock.
If the voltage is lower than the standard values, inspect the ignition coil. (
7-20)
New spark plug
CDI
unit
B/W
Peak volt adaptor
7-20
ELECTRICAL SYSTEM
IGNITION COIL RESISTANCE
Remove the fuel tank. (
4-2)
Disconnect the ignition coil lead wire, and then remove the
ignition coil.
Measure the ignition coil resistance in both the primary and secondary windings using the multi circuit tester. If the resistance in
both the primary and secondary windings is close to the specified values, the windings are in sound condition.
09900-25008: Multi circuit tester set
Tester knob indication: Resistance (Ω
Ω)
Ignition coil resistance
Primary: 0.1 – 1.0 Ω (terminal – ground)
Ω (terminal – spark plug cap)
Secondary: 12 – 20 kΩ
PICKUP COIL AND SIGNAL COIL PEAK VOLTAGE
NOTE:
Make sure that all of the couplers are connected properly.
Remove the left frame cover. (
6-2)
Disconnect the wire harness coupler 1.
Measure the pickup coil and signal coil peak voltage in the following procedure.
Connect the multi circuit tester with the peak volt adaptor as
follows.
Pickup coil: Blue (+ probe) – Green (- probe)
Signal coil: Black (+ probe) – White (- probe)
1
B
W
09900-25008: Multi circuit tester set
BI
G
When using the multi circuit tester and peak volt adaptor, refer to the appropriate instruction manual.
Peak volt adaptor
+
-
Generator
Pickup coil
Shift the transmission into neutral.
Kick the kick starter lever and allow the engine to turn for a
few times, and then measure the pickup coil and signal coil
peak voltage.
Repeat the above procedure a few times and measure the
highest pickup coil and signal coil peak voltage.
Tester knob indication: Voltage (
Peak volt adaptor
B
W
+
-
BI
G
)
Pickup coil peak voltage: More than 10.0 V
Signal coil peak voltage: More than 1.0 V
Generator
Signal coil
ELECTRICAL SYSTEM
PICKUP COIL AND SIGNAL COIL RESISTANCE
Remove the left frame cover. (
6-2)
Disconnect the generator coupler 1.
Measure the resistance between the lead wires using the multi
circuit tester. If the resistance is not within the specified value,
the pickup coil and signal coil must be replaced.
09900-25008: Multi circuit tester set
Tester knob indication: Resistance (Ω
Ω)
Pickup coil resistance: 390 – 600 Ω (Blue – Green)
Signal coil resistance: 0.05 – 0.20 Ω (Black – White)
1
7-21
7-22
ELECTRICAL SYSTEM
IGNITION SYSTEM (DR-Z400E)
DESCRIPTION
In the capacitor discharged ignition system, the battery’s electrical energy charges the capacitor. This energy is released in a single surge at the specified ignition timing point and the current flows through the
primary side of the ignition coil. A high voltage is induced in the secondary windings of the ignition coil,
resulting in a strong spark between the spark plug gap.
Ignition switch
Ignition coil
DC-DC
converter
Regulator
/rectifier
Battery
Ignition power
source circuit
Generator
Wave form
arrangement
circuit
Throttle
position
sensor
CPU
Engine stop
switch
TROUBLESHOOTING
No spark or poor spark
Check the ignition system couplers for poor
connections.
* Make sure the transmission is in the neutral position.
Also, make sure the fuse is not blown and the battery is
fullycharged before diagnosing.
Loose
• Improper coupler
connection
Correct
Measure the battery voltage between input
lead wires (O/W and B/W) at the CDI unit
with the ignition switch in the “ON” position and
the engine stop switch in the “RUN” position.
Correct
Continued on next page
Incorrect
• Faulty ignition switch
• Faulty engine stop switch
• Broken wire harness or
poor connection of related
circuit couplers
ELECTRICAL SYSTEM
Measure the ignition coil primary peak
voltage. (
7-24)
NOTE: The ignition coil peak voltage
inspection method is applicable only with the
multi circuit tester and the peak volt adaptor.
Correct
Inspect the spark plug.
(
2-9)
Correct
Correct
Incorrect
7-23
• Faulty CD unit
Incorrect
• Faulty spark plug
• Improper spark plug
connection
Inspect the ignition coil. (
7-20)
Incorrect
• Faulty ignition coil
Correct
Measure the pickup coil and signal coil peak
voltage and resistance. (
7-21 and 7-25)
NOTE: The pickup coil and signal coil peak
voltage inspection is applicable only with the
multi circuit tester and the peak volt adaptor.
Incorrect
• Faulty pickup coil
• Faulty signal coil
Correct
• Open circuit in wiring
harness.
• Improper ignition coupler
connection
7-24
ELECTRICAL SYSTEM
INSPECTION
IGNITION COIL PRIMARY PEAK VOLTAGE
Remove the fuel tank. (
4-2)
Remove the spark plug cap.
Connect a new spark plug to the spark plug cap and ground it
to the cylinder head.
NOTE:
Make sure that the spark plug cap and spark plug are connected
properly and the battery is fully charged.
Do not let the spark plug touch the cylinder head cover,
otherwise the cylinder head cover may be damaged.
Measure ignition coil primary peak voltage using the multi circuit
tester in the following procedure.
Connect the multi circuit tester with the peak voltage adaptor
as follows.
Ignition coil:
Black/White terminal – Black/Yellow
(+ probe)
(- probe)
NOTE:
Do not disconnect the ignition coil primary wire.
09900-25008: Multi circuit tester set
B/Y
New spark plug
CDI
unit
B/W
Battery
When using the multi circuit tester and peak volt adaptor, refer to the appropriate instruction manual.
Shift the transmission into neutral, and then turn the ignition
switch to the “ON” position.
Pull the clutch lever.
Press the starter button and allow the engine to crank for a
few seconds, and then measure the ignition coil primary peak
voltage.
Repeat the above procedure a few times and measure the
highest ignition coil primary peak voltage.
Tester knob indication: Voltage (
)
Ignition coil primary peak voltage: More than 150 V
While testing, do not touch the tester probes and spark
plug to prevent receiving an electric shock.
If the voltage is lower than the standard values, inspect the ignition coil. (
7-20)
Peak volt adaptor
ELECTRICAL SYSTEM
PICKUP COIL AND SIGNAL COIL PEAK VOLTAGE
NOTE:
Make sure that all of the couplers are connected properly.
Remove the left frame cover. (
6-2)
Disconnect the wire harness coupler 1 at the CDI unit.
Measure the pickup coil and signal coil peak voltage in the
following procedure.
Connect the multi circuit tester with the peak volt adaptor as
follows.
Pickup coil: Blue (+ probe) – Green (- probe)
Signal coil: Black (+ probe) – White (- probe)
1
B
W
BI
09900-25008: Multi circuit tester set
G
When using the multi circuit tester and peak volt adaptor, refer to the appropriate instruction manual.
Peak volt adaptor
+
-
Generator
Pickup coil
Shift the transmission into neutral, and then turn the ignition
switch to the “ON” position.
Pull the clutch lever.
Press the starter button and allow the engine to crank for a
few seconds, and then measure the pickup coil and signal
coil peak voltage.
Repeat the above procedure a few times and measure the
highest pickup coil and signal coil peak voltage.
Peak volt adaptor
B
W
+
-
BI
G
Generator
Tester knob indication: Voltage (
)
Signal coil
Pickup coil peak voltage: More than 5.0 V
Signal coil peak voltage: More than 1.4 V
IGNITION COIL RESISTANCE ..................................
PICKUP COIL AND SIGNAL COIL RESISTANCE ...
7-20
7-21
7-25
7-26
ELECTRICAL SYSTEM
ODOMETER
REMOVAL
Remove the headlight assembly. (
Disconnect the odometer cable.
Remove the odometer assembly.
7-27)
ELECTRICAL SYSTEM
LAMPS
HEADLIGHT
Headlight bulb : 12V 55W
BULB REPLACEMENT
Disconnect the bands and screw.
Disconnect the headlight coupler and remove the headlight
assembly.
7-27
7-28
ELECTRICAL SYSTEM
Remove the rubber cap.
Remove the bulb.
Install the new bulb in the reverse order of removal.
If you touch the bulb with your bare hands, clean the
bulb with a cloth moistened with alcohol or soapy water to prevent premature bulb failure.
TAILLIGHT
TAILLIGHT REPLACEMENT
Remove the seat. (
6-2)
Disconnect the taillight coupler.
Remove the taillight assembly.
ELECTRICAL SYSTEM
7-29
SWITCHES
Measure each switch for continuity using a multi circuit tester. If any abnormality is found, replace the respective switch assemblies with a new one.
09900-25008: Multi circuit tester set
IGNITION SWITCH (DR-Z400E)
Color
Position
R
O
B/W
B/Y
ON
OFF
ENGINE STOP SWITCH
Color
Position
OFF
RUN
STARTER BUTTON (DR-Z400E)
Color
Position
O
B/Y
PUSH
CLUTCH SWITCH (DR-Z400E)
Color
Position
OFF
ON
WIRE COLOR
G
: Green
Gr : Gray
O
: Orange
R
: Red
Y
: Yellow
W
: White
B/W : Black with White tracer
O/W : Orange with White tracer
Y/G : Yellow with Green tracer
Y/G
Y/G
7-30
ELECTRICAL SYSTEM
BATTERY (DR-Z400E)
REMOVAL
Remove the battery cover. (
Remove the battery holder.
6-2)
Remove the battery.
NOTE:
Disconnect the - battery lead wire, first.
SPECIFICATIONS
Type designation
Capacity
GT7B-4
12 V, 23.4 kC (6.5 Ah)/10 HR
SERVICING
Visually inspect the surface of the battery container. If any signs
of cracking or electrolyte leakage from the sides of the battery
have occurred, replace the battery with a new one. If the battery
terminals are found to be coated with rust or an acidic white
powdery substance, clean the battery terminals with sandpaper.
ELECTRICAL SYSTEM
RECHARGING OPERATION
Measure the battery voltage using the multi circuit tester or
digital volt meter. If the voltage reading is less than the 12.6 V
(DC), recharge the battery with a MF battery charger.
When recharging the battery, remove the battery from
the motorcycle.
Recharging time: 0.65 A for 5 to 10 hours.
Do not attempt boost charging under any circumstances.
After recharging, wait at least 30 minutes and then measure
the battery voltage using the multi circuit tester. If the battery
voltage is less than 12.6 V, recharge the battery again. If the
battery voltage is still less than 12.6 V after recharging, replace the battery with a new one.
When a battery is left unused for a long time, its voltage needs
to be regularly measured. When the motorcycle is not used for
more than one month (especially during the winter season),
measure the battery voltage at least once a month.
7-31
SERVICING INFORMATION
8-1
SERVICING INFORMATION
CONTENTS
TROUBLESHOOTING .................................................................................... 8- 2
ENGINE ...................................................................................................... 8- 2
CARBURETOR ........................................................................................... 8- 5
CHASSIS .................................................................................................... 8- 6
BRAKES ..................................................................................................... 8- 7
ELECTRICAL .............................................................................................. 8- 8
BATTERY (DR-Z400E) ................................................................................ 8- 9
WIRING DIAGRAM ......................................................................................... 8-10
DR-Z400 ...................................................................................................... 8-10
DR-Z400E ................................................................................................... 8-11
WIRE HARNESS, CABLE, AND HOSE ROUTING ........................................ 8-12
WIRE ROUTING ......................................................................................... 8-12
CABLE ROUTING ...................................................................................... 8-14
FUEL HOSE AND FUEL TANK MOUNTING .............................................. 8-15
OIL RETURN TANK HOSE ROUTING........................................................ 8-16
COOLING SYSTEM HOSE ROUTING ....................................................... 8-17
FRONT BRAKE HOSE ROUTING .............................................................. 8-18
REAR BRAKE HOSE ROUTING ................................................................ 8-18
SPECIAL TOOLS ............................................................................................ 8-19
TIGHTENING TORQUE................................................................................... 8-22
ENGINE ...................................................................................................... 8-22
CHASSIS .................................................................................................... 8-23
TIGHTENING TORQUE CHART ................................................................. 8-24
SERVICE DATA ............................................................................................... 8-25
8
8-2
SERVICING INFORMATION
TROUBLESHOOTING
ENGINE
Complaint
Engine will not start
or is hard to start.
Engine stalls easily.
Symptom and possible causes
Remedy
Compression too low
1. Worn cylinder.
2. Worn piston ring.
3. Worn valve guide or improper valve seating.
4. Loose spark plug.
5. Broken, cracked, or damaged piston.
6. Slow cranking starter motor. (DR-Z400E)
7. Mistimed valves.
8. Tappet clearance out of adjustment.
Replace.
Replace.
Repair or replace.
Tighten.
Replace.
See electrical section.
Adjust.
Adjust.
Spark plug not sparking
1. Damaged spark plug.
2. Damaged spark plug cap.
3. Fouled spark plug.
4. Wet spark plug.
5. Defective ignition coil.
6. Open or short in high-tension cord.
7. Defective generator.
8. Defective CDI unit.
Replace.
Replace.
Clean or replace.
Clean and dry or replace.
Replace.
Replace.
Replace.
Replace.
No fuel reaching the carburetor
1. Clogged fuel tank vent hose.
2. Clogged or defective fuel valve.
3. Defective carburetor needle valve.
4. Clogged fuel hose.
5. Clogged fuel filter.
Clean or replace.
Clean or replace.
Replace.
Clean or replace.
Clean or replace.
1.
2.
3.
4.
5.
6.
Fouled spark plug.
Defective generator.
Defective CDI unit.
Clogged or defective fuel valve.
Clogged carburetor jet.
Tappet clearance out of adjustment.
Clean or replace.
Replace.
Replace.
Clean or replace.
Clean.
Adjust.
SERVICING INFORMATION
Complaint
Engine is noisy.
Symptom and possible causes
Remedy
Excessive valve chatter
1. Excessive tappet clearance.
2. Weak or broken valve spring.
3. Worn camshaft.
4. Worn or burnt camshaft journal.
Adjust.
Replace.
Replace.
Replace.
Noise seems to come from the piston
1. Worn piston.
2. Worn cylinder.
3. Carbon buildup in combustion chamber.
4. Worn piston pin or piston pin bore.
5. Worn piston ring or ring groove.
Replace.
Replace.
Clean.
Replace.
Replace.
Noise seems to come from the cam chain
1. Stretched cam chain.
2. Worn cam chain sprocket.
3. Improperly working cam chain tensioner.
8-3
Replace cam chain and
sprockets.
Replace cam chain and
sprockets.
Repair or replace.
Noise seems to come from the clutch
1. Worn countershaft spline.
2. Worn clutch hub spline.
3. Worn clutch plate teeth.
4. Distorted clutch plate.
5. Weak clutch damper.
6. Weak clutch spring.
Replace countershaft.
Replace clutch hub.
Replace clutch plate.
Replace.
Replace primary driven gear.
Replace.
Noise seems to come from the crankshaft
1. Rattling bearing.
2. Worn or burnt crank pin bearing.
3. Worn or burnt journal bearing.
4. Excessive thrust clearance.
Replace.
Replace.
Replace.
Replace thrust bearing.
Noise seems to come from the transmission
1. Worn or rubbing gear.
2. Worn countershaft spline.
3. Worn driveshaft spline.
4. Worn or rubbing primary gear.
5. Worn bearing.
Replace.
Replace countershaft.
Replace driveshaft.
Replace.
Replace.
Clutch slips.
1.
2.
3.
4.
Clutch cable out of adjustment.
Weak or broken clutch spring.
Worn or distorted clutch pressure plate.
Distorted clutch plate.
Adjust.
Replace.
Replace.
Replace.
Clutch drags.
1.
2.
3.
4.
Clutch out of adjustment.
Some clutch springs are weak, while others are not.
Worn or distorted clutch pressure plate.
Distorted clutch plate.
Adjust.
Replace.
Replace.
Replace.
Transmission will not
shift.
1. Broken gearshift cam.
2. Distorted gearshift fork.
3. Worn gearshift pawl.
Replace.
Replace.
Replace.
Transmission will not
shift back.
1. Broken gearshift shaft return spring.
2. Rubbing or stuck gearshift shaft.
3. Worn or distorted gearshift fork.
Replace.
Repair or replace.
Replace.
8-4
SERVICING INFORMATION
Complaint
Transmission jumps
out of gear.
Engine idles poorly.
Engine runs poorly in
high-speed range.
Symptom and possible causes
1.
2.
3.
4.
Worn gear.
Worn or distorted gearshift fork.
Weakened gearshift stopper spring.
Worn gearshift pawl.
Replace.
Replace.
Replace.
Replace.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Tappet clearance out of adjustment.
Improper valve seating.
Worn valve guide.
Worn camshaft.
Excessive spark plug gap.
Defective ignition coil.
Defective generator.
Defective CDI unit.
Incorrect float chamber fuel level.
Clogged carburetor jet.
Adjust.
Repair or replace.
Replace.
Replace.
Adjust or replace.
Replace.
Replace.
Replace.
Adjust float height.
Clean.
Weak valve spring.
Worn camshaft.
Insufficient spark plug gap.
Mistimed valves.
Ignition not advanced sufficiently due to poorly working
timing advance circuit.
Defective ignition coil.
Defective generator.
Defective CDI unit.
Low float chamber fuel level.
Dirty air cleaner element.
Clogged fuel hose, resulting in inadequate fuel supply
to carburetor.
Replace.
Replace.
Regap or replace.
Adjust.
Replace CDI unit.
Excessive amount of engine oil.
Worn cylinder.
Worn piston ring.
Worn valve guide.
Scored or scuffed cylinder wall.
Worn valve stem.
Defective valve stem oil seal.
Worn oil ring side rail.
Check level and drain.
Rebore or replace.
Replace.
Replace.
Replace.
Replace valve.
Replace.
Replace oil ring.
Insufficient tappet clearance.
Weak valve spring.
Mistimed valves.
Worn cylinder.
Worn piston ring.
Improper valve seating.
Fouled spark plug.
Incorrect spark plug.
Clogged carburetor jet.
Incorrect float chamber fuel level.
Dirty air cleaner element.
Air leakage from intake pipe.
Excessive amount of engine oil.
Adjust.
Replace.
Adjust.
Replace.
Replace.
Repair or replace.
Clean or replace.
Replace.
Clean.
Adjust float height.
Clean or replace.
Tighten or replace.
Check level and drain.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Exhaust smoke is
dirty or thick.
Engine lacks power.
Remedy
1.
2.
3.
4.
5.
6.
7.
8.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Replace.
Replace.
Replace.
Adjust float height.
Clean or replace.
Clean and prime.
SERVICING INFORMATION
Complaint
Engine overheats.
Symptom and possible causes
1.
2.
3.
4.
5.
6.
7.
Carbon buildup on piston crown.
Insufficient amount of engine oil.
Defective oil pump.
Clogged oil circuit.
Float chamber fuel level too low.
Air leakage from intake pipe.
Incorrect engine oil.
8-5
Remedy
Clean.
Check level and add.
Replace.
Clean.
Adjust float height.
Tighten or replace.
Change.
CARBURETOR
Complaint
Starting difficulty.
Symptom and possible causes
1. Clogged starter jet.
2. Clogged starter jet passage.
3. Air leaking from joint between starter body and carburetor.
4. Air leaking from carburetor joint or vacuum hose joint.
Remedy
5. Improperly working starter (enricher) plunger.
Clean.
Clean.
Tighten, adjust, or replace
gasket.
Tighten or replace defective
part.
Adjust.
Idling or low-speed
trouble.
1. Clogged or loose pilot jet.
2. Clogged or loose pilot air jet.
3. Air leaking from carburetor joint, vacuum pipe joint, or
starter.
4. Clogged pilot outlet port.
5. Clogged bypass port.
6. Starter (enricher) plunger not fully closed.
Clean or tighten.
Clean or tighten.
Tighten or replace defective
part.
Clean.
Clean.
Adjust.
Medium or highspeed trouble.
1.
2.
3.
4.
5.
Clogged main jet.
Clogged main air jet.
Clogged needle jet.
Improperly working throttle valve.
Clogged fuel filter.
Clean.
Clean.
Clean.
Adjust.
Clean or replace.
Overflow and fuel
level fluctuations.
1.
2.
3.
4.
Worn or damaged needle valve.
Broken needle valve spring.
Improperly working float.
Foreign matter on the needle valve.
Replace.
Replace.
Adjust or replace.
Clean or replace with needle
valve seat.
Adjust float height.
5. Incorrect float chamber fuel level.
8-6
SERVICING INFORMATION
CHASSIS
Complaint
Symptom and possible causes
Remedy
Steering is heavy.
1.
2.
3.
4.
Overtightened steering stem nut.
Broken bearing in steering stem.
Distorted steering stem.
Low tire pressure.
Adjust.
Replace.
Replace.
Regulate.
Handlebar wobbles.
1.
2.
3.
4.
Loss of balance between right and left front forks.
Distorted front fork.
Distorted front axle.
Twisted tire.
Adjust or replace.
Repair or replace.
Replace.
Replace.
Front wheel wobbles.
1.
2.
3.
4.
5.
Distorted wheel rim.
Worn front wheel bearing.
Defective or incorrect tire.
Loose front axle nut.
Incorrect fork oil level.
Replace.
Replace.
Replace.
Tighten.
Adjust.
Front suspension too
soft.
1. Weak spring.
2. Insufficient fork oil.
3. Improper suspension setting.
Replace.
Check level and add.
Adjust.
Front suspension too
stiff.
1. Excessively viscous fork oil.
2. Excessive fork oil.
3. Improper suspension setting.
Replace.
Check level and drain.
Adjust.
Front suspension too
noisy.
1. Insufficient fork oil.
2. Loose front suspension fastener.
Check level and add.
Tighten.
Rear wheel wobbles.
1.
2.
3.
4.
5.
6.
Distorted wheel rim.
Worn rear wheel bearing.
Defective or incorrect tire.
Worn swingarm bearing.
Loose rear axle nut.
Loose rear suspension fastener.
Replace.
Replace.
Replace.
Replace.
Tighten.
Tighten.
Rear suspension too
soft.
1. Weak rear shock absorber spring.
2. Rear shock absorber leaks oil.
3. Improper suspension setting.
Replace.
Replace.
Adjust.
Rear suspension too
stiff.
1. Improper suspension setting.
2. Bent rear shock absorber shaft.
3. Worn swingarm bearing and rear suspension related
bearing.
Adjust.
Replace.
Replace.
Rear suspension too
noisy.
1. Loose rear suspension fastener.
2. Worn swingarm bearing and rear suspension related
bearing.
Tighten.
Replace.
SERVICING INFORMATION
8-7
BRAKES
Complaint
Brake power insufficient.
Symptom and possible causes
1. Leakage of brake fluid.
2. Worn brake pad.
3. Oil on brake pad surface.
4. Worn brake disc.
5. Air in hydraulic system.
Brake squeaks.
1. Carbon adhesion on brake pad surface.
2. Tilted brake pad.
3.
4.
5.
6.
Damaged wheel bearing.
Worn brake pad.
Foreign material in brake fluid.
Clogged return port of master cylinder.
7. Loose front or rear axle nut.
Repair or replace.
Replace.
Clean brake disc and brake
pads.
Replace.
Bleed.
Clean surface with sandpaper.
Readjust brake pad position
or replace.
Replace.
Replace.
Change brake fluid.
Disassemble and clean master cylinder.
Tighten.
3. Incorrect brake fluid.
Bleed.
Check level and add. Bleed
any air.
Change.
Brake fluid leaks.
1.
2.
3.
4.
Tighten.
Replace.
Replace.
Replace.
Brake drags.
1. Rusty part.
2. Insufficient brake lever or brake pedal pivot lubrication.
Brake lever or pedal
stroke excessive.
1. Air in hydraulic system.
2. Insufficient brake fluid.
Remedy
Loose connection joint.
Cracked hose.
Worn piston seal.
Worn secondary cup.
Clean and lubricate.
Lubricate.
8-8
SERVICING INFORMATION
ELECTRICAL
Complaint
Symptom and possible causes
Remedy
No sparking or poor
sparking.
1.
2.
3.
4.
Defective ignition coil.
Defective spark plug.
Defective generator.
Defective CDI unit.
Replace.
Replace.
Replace.
Replace.
Spark plug is wet or
quickly
becomes
fouled with carbon.
1.
2.
3.
4.
5.
Excessively rich air/fuel mixture.
Excessively high idling speed.
Incorrect gasoline.
Dirty air cleaner element.
Incorrect spark plug (cold type).
Adjust carburetor.
Adjust carburetor.
Change.
Clean or replace.
Change to hot type spark
plug.
Spark plug quickly becomes fouled with oil
or carbon.
1.
2.
3.
4.
5.
Worn piston ring.
Worn piston.
Worn cylinder.
Excessive valve-stem-to-valve-guide clearance.
Worn valve stem oil seal.
Replace.
Replace.
Replace.
Replace.
Replace.
Spark plug electrodes
overheat or burn.
1. Incorrect spark plug (hot type).
2. Overheated engine.
3. Loose spark plug.
4. Excessively lean air/fuel mixture.
Generator does not
charge.
1. Open or short in lead wires, or loose lead connections.
2. Shorted, grounded, or open generator coil.
3. Shorted or punctured regulator/rectifier.
Change to cold type spark
plug.
Tune-up.
Tighten.
Adjust carburetor.
Repair, replace, or connect
properly.
Replace.
Replace.
Generator charges
but charging rate is
below the specifications.
1. Lead wires tend to get shorted or open-circuited or
loosely connected at terminal.
2. Grounded or open-circuited stator coils or generator.
3. Defective regulator/rectifier.
4. Defective battery cell plates.
Repair or tighten.
Generator
charges.
1. Internal short-circuit in the battery.
2. Damaged or defective regulator/rectifier.
3. Poorly grounded regulator/rectifier.
Replace battery.
Replace.
Repair, replace, or connect
properly.
1. Lead wire insulation frayed due to vibration, resulting
in intermittent shorting.
2. Internally shorted generator.
3. Defective regulator/rectifier.
Repair or replace.
1. Run down battery.
2. Defective switch contact.
3. Brushes do not seat properly on the commutator in the
starter motor.
4. Defective starter relay.
5. Wiring connections loose or disconnected.
Recharge or replace.
Replace.
Repair or replace.
over-
Unstable charging.
Starter button does
not work. (DR-Z400E)
Replace.
Replace.
Replace battery.
Replace.
Replace.
Replace.
Tighten or repair.
SERVICING INFORMATION
8-9
BATTERY (DR-Z400E)
Complaint
Symptom and possible causes
Remedy
Sulfation or spots on
surfaces of cell
plates.
1. Cracked battery case.
2. Battery has been left in a run-down condition for a long
time.
Replace.
Replace.
Battery runs down
quickly.
1. Incorrect charging method.
Check generator, regulator/
rectifier circuit connections,
and make necessary adjustment to obtain specified
charging operation.
Replace battery and correct
charging system.
Replace.
Charge.
Replace.
Clean.
2. Battery cell plates have lost much of their active material as a result of overcharging.
3. Internally shorted battery.
4. Excessively low battery voltage.
5. Battery is too old.
6. Dirty container top and sides.
Battery sulfation.
1. Incorrect charging rate.
(When not in use, the battery should be checked at
least once a month and properly charged if necessary,
to avoid sulfation.)
2. The battery was left unused in a cold climate for too
long.
Replace.
Replace the battery if badly
sulfated.
HEADLIGHT
O
B/W
OFF
RUN
B
Y
G
Y
W
Bl
G
GENERATOR
Bl
Y
IGNITION
COIL
CDI UNIT
Bl
W
B/Y
B/Y
B/W
B/W
ENGINE STOP
SWITCH
REGULATOR/RECTIFIER
_
CONDENSER
+
THROTTLE POSITION
SENSOR
Y
Y
O
Y
Y
B/Y
Y
W
O
Y
B/W
B/W
Bl
Bl
R
B/W
B/W
B
B
B/W
Y
Y
B/W
B/W
O
O
B/W
Y
W
B
Gr
B/W
O
B/W
TAILLIGHT
B .......
Bl . . . . . . .
G .......
Gr. . . . . . .
O .......
R .......
W. . . . . . .
Y .......
B/W . . . . .
B/Y . . . . .
Black
Blue
Green
Gray
Orange
Red
White
Yellow
Black with White tracer
Black with Yellow tracer
WIRE COLORS
8-10
SERVICING INFORMATION
WIRING DIAGRAM
DR-Z400
HEADLIGHT
O
IGNITION SWITCH
ON
OFF
R
R
B/W
O
O
PUSH
OFF
ON
B/Y
Y/G
O
O
Gr
Y/G
Y/G
Y/G
Y/G
Y
Y
Bl
G
GENERATOR
B/W
REGULATOR/RECTIFIER
Y
CDI UNIT
Bl
Y
FUSE BOX
–
O
BATTERY
+
M
STARTER MOTOR
STARTER RELAY
Bl
Bl
B/Y
B/Y
B/W
B/W
THROTTLE POSITION
SENSOR
Y
Y
OFF
RUN
Y
Y
Y
W
Y
Y
W
R
R
G
B/W
B/W
B/Y
B/W
W
B/W
IGNITION
COIL
B/W
R
R
B
B/W
R
CLUTCH LEVER
POSITION SWITCH
Y/G
R/W
STATER BUTTON
B/W
B/W
ENGINE STOP
SWITCH
B .......
Bl . . . . . . .
G .......
Gr . . . . . .
O .......
R .......
W. . . . . . .
Y .......
B/W . . . . .
B/Y . . . . .
Bl/W . . . . .
R/W . . . . .
Y/G . . . . .
Black
Blue
Green
Gray
Orange
Red
White
Yellow
Black with White tracer
Black with Yellow tracer
Blue with White tracer
Red with White tracer
Yellow with Green tracer
WIRE COLORS
TAILLIGHT
Gr
B/W
O
B/W
SERVICING INFORMATION
DR-Z400E
8-11
Bl
R
B
Y
W
B
8-12
SERVICING INFORMATION
WIRE HARNESS, CABLE, AND HOSE ROUTING
WIRE ROUTING
VIEW A
Starter motor lead
DR-Z400E
A
E
B
VIEW B
Generator
Clamp
Generator lead wire
VIEW E
- battery lead wire
C
VIEW C
Generator lead wire
DR-Z400
Clamp
Generator
D
VIEW D
Generator lead wire
C
SERVICING INFORMATION
8-13
B
Breather hose
Radiator hose
Inlet hose
Clamp
Wire harness
Throttle cable must be passed
under radiator hose.
Clutch cable must be passed
outside overflow hose and
inlet hose.
D
Decompression
cable (DR-Z400)
Clutch cable
VIEW D
Clutch cable must be passed to Clutch cable must be passed to
the left of breather hose.
the right of throttle cable, and to
the left of breather hose.
C
Clutch cable
Clamp
Frame
Clutch cable
Overflow hose
A
Throttle cable
Guide
Radiator hose
Clamp
Clutch cable
Clutch cable
Decompression cable
(DR-Z400)
Clutch cable
VIEW B
Throttle cable
Brake hose
0 – 0.1 mm
VIEW A (0 – 0.004 in)
Set boot to clutch cable after cultch
cable setting to stopper.
Thottle cable must be
passed between plate and
upper bracket.
Brake hose
Decompression cable
Throttle cable
(DR-Z400)
m
2 m 8 in)
–
.0
0
–0
(0
VIEW C
Throttle returning cable (yellow)
3 mm (0.12 in)
3 mm (0.12 in)
Throttle pulling cable (white)
Cable guide
8-14
SERVICING INFORMATION
CABLE ROUTING
SERVICING INFORMATION
FUEL HOSE AND FUEL TANK MOUNTING
8-15
8-16
SERVICING INFORMATION
OIL RETURN TANK HOSE ROUTING
1 Face the tip of clip to the front
2 Face the tip of clip to the bottom
Face
Face
Face
Face
Face
Face
the tip of clip to the top
the tip of clip to the bottom
the tip of clip to the right side
the head of screw to the front side
the head of screw to the back side
the head of screw to the right side
COOLING SYSTEM HOSE ROUTING
1
2
3
4
5
6
SERVICING INFORMATION
8-17
8-18
SERVICING INFORMATION
FRONT BRAKE HOSE ROUTING
REAR BRAKE HOSE ROUTING
SERVICING INFORMATION
SPECIAL TOOLS
09900-00401
Hexagon wrench
set
09900-00410
Hexagon wrench
set
09900-06104
Snap ring pliers
09900-06105
Snap ring pliers
09900-06108
Snap ring pliers
09900-09004
Impact driver set
09900-20101
Vernier calipers
09900-20103
Vernier calipers
09900-20202
Micrometer
(25 – 50 mm)
09900-20204
Micrometer
(75 – 100 mm)
09900-20606
Dial gauge
(1/100 mm)
09900-20205
Micrometer
(0 – 25 mm)
09900-20602
09900-20508
Dial gauge
Cylinder gauge set (1/1000 mm)
09900-20605
Dial calipers
(1/100 mm,
10 – 34 mm)
09900-20701
Magnetic stand
09900-20803
Thickness gauge
09900-20805
Tire depth gauge
09900-21304
V-block set
(100 mm)
09900-22301
Plastigauge
09900-22302
Plastigauge
09900-22403
Small bore gauge
(18 – 35 mm)
09900-25008
Multi circuit tester
set
09910-32812
Crankshaft
installer
09910-60611
Universal clamp
wrench
8-19
8-20
SERVICING INFORMATION
09913-50121
Oil seal remover
09913-70210
Bearing installer
set
09915-63310
Adapter
09915-64510
Compression
gauge set
09915-70610
Adapter
09915-74510
Oil pressure gauge 09916-10911
set
Valve lapper set
09916-14510
Valve lifter
09916-14910
Attachment
09916-20610
Seat cutter
(N-121)
09916-21110
Valve seat
Cutter set
09916-22430
Valve seat cutter
(N-114)
09916-24311
Solid pilot
(N-100-5.0)
09916-34542
Reamer handle
09916-34570
09916-34580
09916-44310
Valve guide reamer Valve guide reamer Valve guide
(5.0 mm)
(10.8 mm)
remover
09916-53360
Valve guide installer attachment
09916-84511
Tweezers
09920-13120
Crankcase
separating tool
09921-20220
Bearing remover
set
09923-73210
Bearing remover
09916-22420
Valve seat cutter
(N-128)
09920-53740
Clutch sleeve hub
holder
09921-20210
Bearing remover
SERVICING INFORMATION
8-21
09923-74510
Bearing remover
09924-84510
Bearing installer
set
09924-84521
Bearing installer
set
09925-18010
Steering bearing
installer
09930-30102
Sliding hammer
09930-31921
Rotor remover set
09930-44913
Rotor holder
09940-14911
Steering stem nut
wrench
09940-14960
Steering stem nut
wrench socket
09940-34520
T handle
09940-34581
Attachment F
09940-52841
09940-52861
Front fork inner rod Front fork oil seal
holder
installer
09940-54821
Front fork assembly tool
09940-94922
Stopper plate
09941-34513
Bearing installer
09941-50111
Bearing remover
09941-74910
Bearing installer
09943-74111
Fork oil level gauge
09941-54911
Bearing outer race
remover
8-22
SERVICING INFORMATION
TIGHTENING TORQUE
ENGINE
ITEM
Cylinder head cover bolt
Spark plug
N·m
14
11
kgf-m
1.4
1.1
lb-ft
10.0
8.0
Cylinder head side bolt
Cylinder nut
Decompression shaft bolt (DR-Z400)
Decompression shaft lever nut (DR-Z400)
Camshaft journal holder bolt
46
10
14
10
10
23
10
4.6
1.0
1.4
1.0
1.0
2.3
1.0
33.5
7.0
10.0
7.0
7.0
16.5
7.0
Balancer shaft nut
Primary drive gear nut
Generator rotor nut
Clutch sleeve hub nut
Gearshift arm stopper
Gearshift cam driven gear bolt
50
110
100
70
19
24
5.0
11.0
10.0
7.0
1.9
2.4
36.0
79.5
72.5
50.5
13.5
17.5
Cam chain tension adjuster bolt
Cam chain tensioner mounting bolt
Cam chain tensioner spring holder bolt
Engine oil drain plug (on the crankcase)
Engine oil drain bolt (on the frame)
Engine oil lebel bolt
10
10
8
21
18
6
1.0
1.0
0.8
2.1
1.8
0.6
7.0
7.0
6.0
15.0
13.0
4.5
Crankcase bolt
Oil strainer (on the frame)
Oil hose union bolt
Radiator air bleeder bolt
TDC plug
Engine mounting nut
11
23
23
6.0
23
66
1.1
2.3
2.3
0.6
2.3
6.6
8.0
16.5
16.5
4.3
16.5
47.5
Engine mounting bracket nut
Exhaust pipe bolt and nut
Muffler connection bolt
Muffler mounting bolt
Engine sprocket nut
Intake pipe union
40
23
20
23
110
8
4.0
2.3
2.0
2.3
11.0
0.8
29.0
16.5
14.5
16.5
79.5
6.0
Fuel valve mounting bolt
4.4
0.44
3.2
Cylinder head bolt
M10
M6
SERVICING INFORMATION
CHASSIS
ITEM
Handlebar clamp bolt
Front fork upper clamp bolt
N·m
23
30
kgf-m
2.3
3.0
lb-ft
16.5
21.5
Front fork lower clamp bolt
Steering stem head nut
Front fork cap bolt
Front fork damper rod bolt
Front fork inner rod locknut
Front brake master cylinder mounting bolt
32
90
23
80
22
10
3.2
9.0
2.3
8.0
2.2
1.0
23.0
65.0
16.5
58.0
16.0
7.0
Rear brake master cylinder mounting bolt
Brake hose union bolt (front & rear)
Front brake caliper mounting bolt
Brake pad mounting pin (front & rear)
Brake caliper plug (front & rear)
Brake air bleeder valve (front & rear)
Rear brake rod locknut
10
23
26
18
2.5
7.5
18
1.0
2.3
2.6
1.8
0.25
0.75
1.8
7.0
16.5
19.0
13.0
1.8
5.5
13.0
Rear brake pedal bolt
Brake disc mounting bolt (front & rear)
Front axle nut
Front axle pinch bolt
Seat rail mounting nut (upper)
Seat rail mounting bolt (lower)
29
10
42
18
35
35
2.9
1.0
4.2
1.8
3.5
3.5
21.0
7.0
30.5
13.0
25.5
25.5
Rear axle nut
Rear sprocket nut
Drive chain roller mounting bolt (upper & lower)
Spoke nipple (front & rear)
Swingarm pivot nut
100
110
30
40
3
77
10.0
11.0
3.0
4.0
0.3
7.7
72.5
79.5
21.5
29.0
2.0
55.5
Rear shock absorber compression adjuster assembly
Rear shock absorber spring adjuster lock ring
Rear shock absorber mounting nut (upper & lower)
Cushion lever mounting nut (center)
Cushion lever mounting nut (front)
Cushion rod mounting nut
30
90
55
100
100
100
3.0
9.0
5.5
10.0
10.0
10.0
21.5
65.0
40.0
72.5
72.5
72.5
Side stand bolt
Side stand nut
50
55
5.0
5.5
36.0
40.0
E-03, 28
The other countries
8-23
8-24
SERVICING INFORMATION
TIGHTENING TORQUE CHART
For other nuts and bolts not listed in the preceding page, refer to this chart:
Bolt Diameter
A (mm)
4
5
6
Conventional or “4” marked bolt
N·m
kgf-m
lb-ft
1.5
0.15
1.0
3
0.3
2.0
5.5
0.55
4.0
8
10
12
14
16
18
13
29
45
65
105
160
Conventional bolt
1.3
2.9
4.5
6.5
10.5
16.0
9.5
21.0
32.5
47.0
76.0
115.5
“4” marked bolt
N·m
2.3
4.5
10
“7” marked bolt
kgf-m
0.23
0.45
1.0
lb-ft
1.5
3.0
7.0
23
50
85
135
210
240
2.3
5.0
8.5
13.5
21.0
24.0
16.5
36.0
61.5
97.5
152.0
173.5
“7” marked bolt
SERVICING INFORMATION
8-25
SERVICE DATA
VALVE + GUIDE
ITEM
Valve diameter
Tappet clearance (when cold)
Valve-guide-to-valve-stem clearance
Valve stem deflection
Valve guide I.D.
Valve stem O.D.
Valve stem runout
Valve stem thickness
Valve seat width
Valve head radial runout
Valve spring free length
(IN. & EX.)
Valve spring tension
(IN. & EX.)
Unit: mm (in)
LIMIT
STANDARD
IN.
36
(1.42)
—
EX.
29
(1.14)
—
IN.
0.10 – 0.20
(0.0039 – 0.0079)
—
EX.
0.20 – 0.30
(0.0079 – 0.0118)
—
IN.
0.010 – 0.037
(0.0004 – 0.0015)
—
EX.
0.030 – 0.057
(0.0012 – 0.0022)
—
IN. & EX.
—
0.35
(0.014)
IN. & EX.
5.000 – 5.012
(0.1969 – 0.1973)
—
IN.
4.975 – 4.990
(0.1959 – 0.1965)
—
EX.
4.955 – 4.970
(0.1951 – 0.1957)
—
IN. & EX.
—
0.05
(0.002)
IN. & EX.
—
0.5
(0.02)
IN. & EX.
0.9 – 1.1
(0.035 – 0.043)
—
IN. & EX.
—
0.03
(0.001)
INNER
—
32.6
(1.28)
OUTER
—
36.3
(1.43)
INNER
56 – 64 N
(5.6 – 6.4 kgf, 12.3 – 14.1 lbs)
at length 27.4 mm (1.08 in)
—
OUTER
126 – 145 N
(12.6 – 14.5 kgf, 27.7 – 32.0 lbs)
at length 30.9 mm (1.22 in)
—
8-26
SERVICING INFORMATION
CAMSHAFT + CYLINDER HEAD
ITEM
Cam height
Camshaft journal oil clearance
Camshaft journal holder I.D.
Camshaft journal O.D.
Camshaft runout
STANDARD
36.910 – 36.960
(1.4531 – 1.4551)
IN.
Unit: mm (in)
LIMIT
36.610
(1.4413)
EX.
36.880 – 36.930
(1.4520 – 1.4539)
36.580
(1.4402)
IN. & EX.
0.019 – 0.053
(0.0007 – 0.0021)
0.150
(0.0059)
IN. & EX.
22.012 – 22.025
(0.8666 – 0.8671)
—
IN. & EX.
21.972 – 21.993
(0.8653 – 0.8659)
—
IN. & EX.
—
0.10
(0.004)
Cam chain pin (at arrow “3”)
Cylinder head distortion
Cylinder head cover distortion
Decompression cable play (DR-Z400)
15th pin
—
—
0.05
(0.002)
—
0.05
(0.002)
0 – 0.1
(0 – 0.004)
—
CYLINDER + PISTON + PISTON RING
ITEM
Compression pressure (DR-Z400E)
(Automatic decompression actuated)
STANDARD
1 000 kPa
(10.0 kgf/cm2, 142 psi)
Unit: mm (in)
LIMIT
—
Piston-to-cylinder clearance
0.030 – 0.040
(0.0012 – 0.0016)
0.120
(0.0047)
Cylinder bore
90.000 – 90.015
(3.5433 – 3.5439)
Nicks or
scratches
89.965 – 89.980
(3.5419 – 3.5425)
Measure 15 (0.6) from the skirt end
89.880
(3.5386)
—
0.05
(0.002)
Piston diameter
Cylinder distortion
Piston ring free end gap
Piston ring end gap
Piston-ring-to-piston-ring-groove clearance
1st
R
Approximately 6.9 (0.27)
5.5
(0.22)
2nd
R
Approximately 11.5 (0.45)
9.2
(0.36)
1st & 2nd
0.08 – 0.20
(0.003 – 0.008)
0.50
(0.020)
1st
—
0.180
(0.007)
2nd
—
0.150
(0.006)
SERVICING INFORMATION
ITEM
Piston ring groove width
Piston ring thickness
1st
STANDARD
0.78 – 0.80 (0.0307 – 0.0315)
1.30 – 1.32 (0.0512 – 0.0520)
8-27
LIMIT
—
2nd
0.81 – 0.83
(0.0319 – 0.0327)
—
Oil
2.01 – 2.03
(0.0791 – 0.0799)
—
1st
0.71 – 0.76 (0.0280 – 0.0299)
1.08 – 1.10 (0.0425 – 0.0433)
—
2nd
0.77 – 0.79
(0.0303 – 0.0311)
—
Piston pin bore
20.002 – 20.008
(0.7875 – 0.7877)
20.030
(0.7886)
Piston pin O.D.
19.995 – 20.000
(0.7872 – 0.7874)
19.980
(0.7866)
STANDARD
20.010 – 20.018
(0.7878 – 0.7881)
Unit: mm (in)
LIMIT
20.040
(0.7890)
CONROD + CRANKSHAFT
ITEM
Conrod small end I.D.
Crank-web-to-crank-web width
62.0 ± 0.1
(2.441 ± 0.004)
—
—
3.0
(0.12)
Conrod big end side clearance
0.30 – 0.65
(0.012 – 0.026)
1.0
(0.04)
Conrod big end width
21.95 – 22.00
(0.864 – 0.866)
—
—
0.08
(0.003)
Conrod deflection
Crankshaft runout
OIL PUMP
ITEM
Oil pump reduction ratio
Oil pressure (at 60°C, 140°F)
STANDARD
2.220 (74/25 × 20/16 × 12/20)
Above 40 kPa (0.4 kgf/cm2, 5.7 psi)
Below 140 kPa (1.4 kgf/cm2, 19.9 psi)
at 3000 r/min
Unit: mm (in)
LIMIT
—
—
8-28
SERVICING INFORMATION
CLUTCH
ITEM
Clutch lever play
Unit: mm (in)
LIMIT
STANDARD
10 – 15
(0.4 – 0.6)
—
Clutch drive plate thickness
(No. 1 & No. 2)
2.92 – 3.08
(0.115 – 0.121)
2.62
(0.103)
Clutch drive plate claw width
(No. 1 & No. 2)
13.7 – 13.8
(0.539 – 0.543)
13.2
(0.520)
—
0.10
(0.004)
—
49.9
(1.96)
Clutch drive plate distortion
Clutch spring free length
TRANSMISSION + DRIVE CHAIN
Unit: mm (in) Except ratio
LIMIT
—
ITEM
Primary reduction ratio
STANDARD
2.960 (74/25)
Final reduction ratio
3.357 (47/14)
—
Low
2.285 (32/14)
—
2nd
1.733 (26/15)
—
3rd
1.375 (22/16)
—
4th
1.090 (24/22)
—
Top
0.863 (19/22)
—
0.1 – 0.3
(0.004 – 0.012)
0.5
(0.02)
Gear ratios
Gearshift-fork-to-gearshift-fork-groove
clearance
Gearshift fork groove width
No. 1, No. 2
& No. 3
4.8 – 4.9
(0.189 – 0.193)
—
Gearshift fork thickness
No. 1, No. 2
& No. 3
4.6 – 4.7
(0.181 – 0.185)
—
Type
RK520KZO
—
Links
112
—
20-pitch length
—
319.4
(12.57)
Drive chain
Drive chain slack
40 – 50
(1.6 – 2.0)
—
SERVICING INFORMATION
CARBURETOR
SPECIFICATION
ITEM
DR-Z400
DR-Z400E
E-03, 28
←
E-01
KEIHIN FCR39H
E-03, 28
←
E-01
←
39 mm (1.5 in)
←
←
←
29F0
29F1
29F3
29F4
Idle r/min
1800 ± 100 r/min
←
←
←
Float height
9.0 ± 1.0 mm (0.35 ± 0.04 in)
←
←
←
(M.J.)
#165
#142
#165
#142
Main air jet
(M.A.J.)
#200
←
←
←
Jet needle
(J.N.)
OBDXP-4th
←
←
←
Needle jet
(N.J.) 2.9 mm (0.11 in)
←
←
←
Slow jet
(S.J.)
#45
←
←
←
(S.A.J.)
#60
←
←
←
Air jet
(A.J.)
#90
←
←
←
Pilot screw
(P.S.)
1 1/2 turns out
←
←
←
2 – 4 mm (0.08 – 0.16 in)
←
←
←
Carburetor type
Bore size
I.D. No.
Main jet
Slow air jet
Throttle cable play
RADIATOR + ENGINE COOLANT
ITEM
Radiator cap valve opening pressure
Engine coolant type
Engine coolant capacity
STANDARD/SPECIFICATION
95 – 125 kPa
(0.95 – 1.25 kgf/cm2, 13.5 – 17.8 psi)
Use an antifreeze/coolant compatible with aluminum radiators, mixed with distilled water only, at
the ratio of 50:50
1 250 ml
(1.3 US qt, 1.1 lmp qt)
NOTE
8-29
8-30
SERVICING INFORMATION
BRAKE + WHEEL
ITEM
Rear brake pedal height
Brake disc thickness
Brake disc runout
Master cylinder bore
Master cylinder piston diameter
Brake caliper cylinder bore
Brake caliper piston diameter
STANDARD/SPECIFICATION
5
(0.2)
Wheel rim size
Wheel axle runout
—
Front
3.0 ± 0.2
(0.118 ± 0.008)
2.5
(0.10)
Rear
4.5 ± 0.2
(0.177 ± 0.008)
4.0
(0.16)
Front &
Rear
—
0.30
(0.01)
Front
11.000 – 11.043
(0.4331 – 0.4348)
—
Rear
12.700 – 12.743
(0.5000 – 0.5017)
—
Front
10.957 – 10.984
(0.4314 – 0.4324)
—
Rear
12.657 – 12.684
(0.4983 – 0.4994)
—
Front
27.000 – 27.050
(1.0630 – 1.0650)
—
Rear
27.000 – 27.050
(1.0630 – 1.0650)
—
Front
26.900 – 26.950
(1.0591 – 1.0610)
—
Rear
26.900 – 26.950
(1.0591 – 1.0610)
—
Brake fluid type
Wheel rim runout
Unit: mm (in)
LIMIT
DOT 4
—
Axial
—
2.0
(0.08)
Radial
—
2.0
(0.08)
Front
1.60 × 21
—
Rear
2.15 × 18
—
Front
—
0.25
(0.010)
Rear
—
0.25
(0.010)
SERVICING INFORMATION
TIRE
ITEM
Cold inflation tire pressure (Solo riding)
Tire size
Tire tread depth
STANDARD/SPECIFICATION
Front
100 kPa (1.0 kgf/cm2, 14 psi)
ITEM
Front fork stroke
Unit: mm (in)
LIMIT
—
Rear
100 kPa (1.0 kgf/cm2, 14 psi)
—
Front
80/100 – 21 51M
—
Rear
110/100 – 18 64M
—
Front
—
4.0
(0.16)
Rear
—
4.0
(0.16)
SUSPENSION
STANDARD/SPECIFICATION
288
(11.3)
Unit: mm (in)
LIMIT
—
Front fork spring free length
510.6
(20.1)
500
(19.7)
Front fork oil level (without spring)
122
(4.8)
—
SUZUKI FORK OIL SS-05 or an equivalent fork oil
—
720 ml
(24.3 US oz, 25.4 lmp oz)
—
Rebound
15 clicks out
—
Compression
12 clicks out
—
Front fork oil type
Front fork oil capacity (each leg)
Front fork damping force adjuster
Rear shock absorber gas pressure
Rear shock absorber oil type
900 kPa
(9.0 kgf/cm2, 128 psi)
—
SUZUKI REAR SUSPENSION OIL SS-25 or an
equivalent suspension oil
—
380 ml
(12.8 US oz, 13.4 lmp oz)
—
258.0
(10.2)
—
Rear shock absorber oil capacity
Rear shock absorber spring pre-set
length
Rear shock absorber damping force adjuster
Rear wheel travel
Swingarm pivot shaft runout
8-31
Rebound
13 clicks out
—
Compression
12 clicks out
—
295
(11.6)
—
—
0.3
(0.01)
8-32
SERVICING INFORMATION
ELECTRICAL
ITEM
Spark plug
SPECIFICATION
NGK: CR8E
DENSO: U24 ESR-N
Type
0.7 – 0.8
(0.028 – 0.031)
Gap
Over 8 (0.3) at 1 atm.
Spark performance
Ignition coil resistance
Ignition coil primary peak voltage
Generator coil resistance
Pickup coil peak voltage
Signal coil peak voltage
Generator no-load voltage
(when engine is cold)
Regulated voltage
Generator maximum output
Starter relay resistance
Battery
Primary
0.1 – 1.0 Ω
Terminal – Ground
Secondary
12 – 20 kΩ
Plug cap – Terminal
More than 150 V (+:B/W, -:B/Y)
Signal coil
0.05 – 0.20 Ω
B–W
Pickup coil
390 – 600 Ω
G – Bl
Charging coil
0.50 – 1.25 Ω
Y –Y
More than 10.0 V (+:Bl, -:G)
DR-Z400
More than 5.0 V (+:Bl, -:G)
DR-Z400E
More than 1.0 V (+:B, -:W)
DR-Z400
More than 1.4 V (+:B, -:W)
DR-Z400E
More than 55 V (AC) at 5 000 r/min (Y–Y)
DR-Z400
More than 75V (AC) at 5 000 r/min (Y–Y)
DR-Z400E
12.5 – 14.0 V at 5 000 r/min
DR-Z400
13.5 – 15.0 V at 5 000 r/min
DR-Z400E
150 W at 5 000 r/min
DR-Z400
200 W at 5 000 r/min
DR-Z400E
3–5Ω
DR-Z400E
Type designation
GT7B-4
Capacity
12 V 23.4 kC (6.5 Ah)/10 HR
WATTAGE
Taillight
DR-Z400E
Unit: W
ITEM
Headlight
Unit: mm (in)
NOTE
SPECIFICATION
55
LED
SERVICING INFORMATION
FUEL + OIL
ITEM
Fuel type
SPECIFICATION
Use only unleaded gasoline of at least 90 pump
octane ( R +2 M ).
Gasoline containing MTBE (Methyl Tertiary Butyl
Ether), less than 10 % ethanol, or less than 5 %
methanol with appropriate cosolvents and corrosion inhibitor is permissible.
Gasoline used should be graded 95 octane or
higher. An unleaded gasoline is recommended.
Fuel tank including reserve
10.0 L
(2.6 US gal, 2.2 lmp gal)
2.3 L
(0.6 US gal, 0.5 lmp gal)
reserve
Engine oil type
Engine oil capacity
SAE 10 W-40, API SF or SG
Change
1 700 ml
(1.8 US qt, 1.5 Imp qt)
Filter change
1 800 ml
(1.9 US qt, 1.6 Imp qt)
Overhaul
1 900 ml
(2.0 US qt, 1.7 Imp qt)
NOTE
E-03, 28
E-01
8-33
DR-Z400EY (E-24 MODEL)
9-1
DR-Z400EY (E-24 MODEL)
This chapter describes service specifications, service data and servicing procedures which differ from those of the DR-Z400Y/EY (E-01, 03 and 28 models).
NOTE:
* Any difference between the DR-Z400Y/EY (E-01, 03 and 28 models) and DR-Z400EY (E-24
model) in specifications and service data are clearly indicated with an asterisk (*).
* Please refer to the chapters 1 through 8 for details which are not given in this chapter.
CONTENTS
SPECIFICATIONS .................................................................................... 9- 2
SERVICE DATA ........................................................................................ 9- 4
SIDE-STAND/IGNITION INTERLOCK SYSTEM...................................... 9-12
SWITCHES ............................................................................................... 9-13
SPEEDOMETER ...................................................................................... 9-14
WIRING DIAGRAM ................................................................................... 9-17
WIRE, CABLE AND HOSE ROUTING ..................................................... 9-18
9
9-2
DR-Z400EY (E-24 MODEL)
SPECIFICATIONS
DIMENSIONS AND DRY MASS
Overall length ................................................... 2 310 mm (90.9 in)
Overall width .................................................... 825 mm (32.5 in)
Overall height ................................................... 1 245 mm (49.0 in)
Wheelbase ....................................................... 1 475 mm (58.1 in)
Ground clearance ............................................ 315 mm (12.4 in)
Seat height ....................................................... 935 mm (36.8 in)
Dry mass .......................................................... 127 kg (279 lbs)
ENGINE
Type..................................................................
Number of cylinders .........................................
Bore .................................................................
Stroke ...............................................................
Piston displacement ........................................
Compression ratio ............................................
Carburetor ........................................................
Air cleaner ........................................................
Starter system..................................................
Lubrication system ...........................................
Four-stroke, liquid-cooled, DOHC
1
90.0 mm (3.543 in)
62.6 mm (2.465 in)
398 cm3 (24.3 cu. in)
12.2 : 1
KEIHIN FCR39
Polyurethane foam element
Electric
Dry sump
TRANSMISSION
Clutch ...............................................................
Transmission ....................................................
Gearshift pattern ..............................................
Primary reduction ratio ....................................
Final reduction ratio .........................................
Gear ratios, Low ...............................................
2nd ................................................
3rd .................................................
4th .................................................
Top ................................................
Drive chain .......................................................
Wet multi-plate type
5-speed constant mesh
1-down, 4-up
2.960 (74/25)
3.357 (47/14)
2.285 (32/14)
1.733 (26/15)
1.375 (22/16)
1.090 (24/22)
0.863 (19/22)
RK520KZO, 112 links
DR-Z400EY (E-24 MODEL)
9-3
CHASSIS
Front suspension ............................................. Telescopic, coil spring, oil damped, rebound damping force
18-way adjustable, compression damping force 14-way adjustable
Rear suspension .............................................. Link type, coil spring, oil damped, spring preload fully adjustable, rebound damping force 21-way adjustable, compression damping force 26-way adjustable
Front fork stroke ............................................... 288 mm (11.3 in)
Rear wheel travel ............................................. 295 mm (11.6 in)
Caster .............................................................. 27° 20´
Trail ................................................................... 112 mm (4.41 in)
Steering angle ................................................. 45° (right & left)
Turning radius .................................................. 2.2 m (7.2 ft)
Front brake ....................................................... Disc brake
Rear brake ....................................................... Disc brake
Front tire size ................................................... *80/100-21 51P
Rear tire size .................................................... *120/90-18 65P
ELECTRICAL
Ignition type ..................................................... Electronic ignition (CDI)
Ignition timing ................................................... 7° BTDC at 1 800 r/min
Spark plug ........................................................ NGK: CR8E
DENSO: U24ESR-N
Generator ......................................................... Three-phase A.C. generator
Battery ............................................................. 12 V 23.4 kC (6.5 Ah)/10 HR
Fuse ................................................................. *20 A
Headlight .......................................................... *12 V 60/55 W
Brake light/Taillight ........................................... *12 V 21/5 W
Turn signal light ................................................ *12 V 21 W
Speedometer light............................................ *LED
Neutral indicator light ....................................... *12 V 2 W
High beam indicator light ................................. *12 V 2 W
Turn signal indicator light ................................. *12 V 2 W
CAPACITIES
Fuel tank, including reserve ............................
reserve ............................................
Engine oil, oil change ......................................
oil and filter change .......................
engine overhaul .............................
Front fork oil .....................................................
Engine coolant .................................................
10.0 L (2.6 US gal, 2.2 Imp gal)
2.3 L (0.6 US gal, 0.5 Imp gal)
1 700 ml (1.8 US qt, 1.5 Imp qt)
1 800 ml (1.9 US qt, 1.6 Imp qt)
1 900 ml (2.0 US qt, 1.7 Imp qt)
720 ml (24.3 US oz, 25.4 Imp oz)
1 250 ml (1.3 US qt, 1.1 Imp qt)
NOTE:
These specifications are subject to change without notice.
9-4
DR-Z400EY (E-24 MODEL)
SERVICE DATA
VALVE + GUIDE
Unit: mm (in)
ITEM
Valve diam.
STANDARD
IN.
EX.
Tappet clearance (when cold)
IN.
EX.
Valve guide to valve stem
clearance
IN.
EX.
Valve stem deflection
Valve guide I.D.
Valve stem O.D.
IN. & EX.
IN. & EX.
IN.
EX.
Valve stem runout
Valve head thickness
Valve seat width
Valve head radial runout
Valve spring free length
(IN. & EX.)
36
(1.42)
29
(1.14)
0.10 – 0.20
(0.0039 – 0.0078)
0.20 – 0.30
(0.0078 – 0.0118)
0.010 – 0.037
(0.0004 – 0.0015)
0.030 – 0.057
(0.0012 – 0.0022)
———
5.000 – 5.012
(0.1969 – 0.1973)
4.975 – 4.990
(0.1959 – 0.1965)
4.955 – 4.970
(0.1951 – 0.1957)
IN. & EX.
———
IN. & EX.
———
IN. & EX.
0.9 – 1.1
(0.035 – 0.043)
IN. & EX.
———
INNER
———
OUTER
———
Valve spring tension (IN. & EX.)
INNER
OUTER
56 – 64 N
(5.6 – 6.4 kgf, 12.3 – 14.1 lbs)
at length 27.4 mm (1.08 in)
126 – 145 N
(12.6 – 14.5 kgf, 27.7 – 32.0 lbs)
at length 30.9 mm (1.22 in)
LIMIT
———
———
———
———
———
———
0.35
(0.014)
———
———
———
0.05
(0.002)
0.5
(0.02)
———
0.03
(0.001)
32.6
(1.28)
36.3
(1.43)
———
———
DR-Z400EY (E-24 MODEL)
CAMSHAFT + CYLINDER HEAD
Unit: mm (in)
ITEM
Cam height
STANDARD
EX.
Camshaft journal holder I.D.
Camshaft journal O.D.
LIMIT
36.910 – 36.960
(1.4531 – 1.4551)
36.880 – 36.930
(1.4520 – 1.4539)
0.019 – 0.053
(0.0007 – 0.0021)
22.012 – 22.025
(0.8666 – 0.8671)
21.972 – 21.993
(0.8653 – 0.8659)
IN.
Camshaft journal oil clearance
IN. & EX.
IN. & EX.
IN. & EX.
Camshaft runout
15th pin
———
Cylinder head cover distortion
———
CYLINDER + PISTON + PISTON RING
ITEM
Piston to cylinder clearance
Cylinder bore
Piston diam.
Piston ring free end gap
(
Piston ring end gap
2nd
R
1st
2nd
Piston ring to groove clearance
)
———
R
———
LIMIT
1 000 kPa
10.0 kgf/cm2
142 psi
0.030 – 0.040
(0.0012 – 0.0016)
90.000 – 90.015
(3.5433 – 3.5439)
89.965 – 89.980
(3.5419 – 3.5425)
Measure at 15 mm (0.6 in) from the skirt end.
1st
———
Unit: mm (in)
STANDARD
Cylinder distortion
36.610
(1.4413)
36.580
(1.4402)
0.150
(0.0059)
0.10
(0.004)
———
0.05
(0.002)
0.05
(0.002)
———
Cam chain pin (at arrow “3”)
Cylinder head distortion
Compression pressure
(Automatic de-comp. actuated)
9-5
6.9
(0.27)
11.5
Approx.
(0.45)
0.08 – 0.20
(0.003 – 0.008)
0.08 – 0.20
(0.003 – 0.008)
Approx.
1st
———
2nd
———
———
0.120
(0.0047)
Nicks or
Scratches
89.880
(3.5386)
0.05
(0.002)
5.5
(0.22)
9.2
(0.36)
0.50
(0.020)
0.50
(0.020)
0.180
(0.007)
0.150
(0.006)
9-6
DR-Z400EY (E-24 MODEL)
ITEM
STANDARD
Piston ring groove width
1st
2nd
Oil
Piston ring thickness
1st
2nd
Piston pin bore
Piston pin O.D.
0.78 – 0.80
(0.0307 – 0.0315)
1.30 – 1.32
(0.0512 – 0.0520)
0.81 – 0.83
(0.0319 – 0.0327)
2.01 – 2.03
(0.0791 – 0.0799)
0.71 – 0.76
(0.0280 – 0.0299)
1.08 – 1.10
(0.0425 – 0.0433)
0.77 – 0.79
(0.0303 – 0.0311)
20.002 – 20.008
(0.7875 – 0.7877)
19.995 – 20.000
(0.7872 – 0.7874)
CONROD + CRANKSHAFT
ITEM
Conrod small end I.D.
Conrod deflection
Conrod big end side clearance
Conrod big end width
Crank web to web width
Crankshaft runout
LIMIT
———
———
———
———
———
———
———
20.030
(0.7886)
19.980
(0.7866)
Unit: mm (in)
STANDARD
20.010 – 20.018
(0.7878 – 0.7881)
———
0.30 – 0.65
(0.012 – 0.026)
21.95 – 22.00
(0.864 – 0.866)
62.0 ± 0.1
(2.441 ± 0.004)
———
LIMIT
20.040
(0.7890)
3.0
(0.12)
1.0
(0.04)
———
———
0.08
(0.003)
OIL PUMP
ITEM
Oil pump reduction ratio
Oil pressure (at 60°C, 140°F)
STANDARD
LIMIT
2.220 (74/25 × 20/16 × 12/20)
Above 40 kPa (0.4 kgf/cm2, 5.7 psi)
Below 140 kPa (1.4 kgf/cm2, 19.9 psi)
at 3 000 r/min.
———
———
DR-Z400EY (E-24 MODEL)
CLUTCH
Unit: mm (in)
ITEM
Clutch cable play
STANDARD
10 – 15
(0.4 – 0.6)
2.92 – 3.08
(0.115 – 0.121)
13.7 – 13.8
(0.539 – 0.543)
Drive plate thickness
(No. 1 & No. 2)
Drive plate claw width
(No. 1 & No. 2)
Driven plate distortion
———
Clutch spring free length
———
TRANSMISSION + DRIVE CHAIN
ITEM
Primary reduction ratio
Final reduction ratio
Gear ratios
Low
2nd
3rd
4th
Top
Shift fork to groove clearance
Shift fork groove width
No.1, No.2
& No.3
No.1, No.2
& No.3
Type
Links
Shift fork thickness
Drive chain
Drive chain slack
STANDARD
2.960 (74/25)
3.357 (47/14)
2.285 (32/14)
1.733 (26/15)
1.375 (22/16)
1.090 (24/22)
0.863 (19/22)
0.1 – 0.3
(0.004 – 0.012)
4.8 – 4.9
(0.189 – 0.193)
4.6 – 4.7
(0.181 – 0.185)
RK520KZO
112
———
40 – 50
(1.6 – 2.0)
CARBURETOR
ITEM
Carburetor type
Bore size
I.D. No
Idle r/min.
Float height
(M.J.)
(J.N.)
(N.J.)
LIMIT
———
2.62
(0.103)
13.2
(0.520)
0.10
(0.004)
49.9
(1.96)
Unit: mm (in) Except ratio
20-pitch length
Main jet
Jet needle
Needle jet
9-7
SPECIFICATION
KEIHIN FCR39H
39 mm
(1.5 in)
* 29F6
1 800 ± 100 r/min
9.0 ± 1.0 mm
(0.35 ± 0.04 in)
#165
OBDXP-4th
2.9 mm
(0.11 in)
LIMIT
———
———
———
———
———
———
———
0.5
(0.020)
———
———
———
———
319.4
(12.57)
———
9-8
DR-Z400EY (E-24 MODEL)
ITEM
Slow jet
Slow air jet
Air jet
Pilot screw
Throttle cable play
(pulling cable)
SPECIFICATION
(S.J.)
(S.A.J.)
(A.J.)
(P.S.)
#45
#60
#90
* 2¾ turns back
2 – 4 mm
(0.08 – 0.16 in)
RADIATOR + ENGINE COOLANT
ITEM
Radiator cap valve opening
pressure
Engine coolant type
Engine coolant capacity
STANDARD/SPECIFICATION
95 – 125 kPa
(0.95 – 1.25 kgf/cm2, 13.5 – 17.8 psi)
Use an anti-freeze/coolant compatible with aluminum radiator, mixed with distilled water only, at the
ratio of 50 : 50.
1 250 ml
(1.3/1.1 US/Imp qt)
BRAKE + WHEEL
ITEM
Brake lever play
Rear brake pedal height
Brake disc thickness
Unit: mm (in)
STANDARD/SPECIFICATION
0.1 – 0.3
(0.004 – 0.010)
5
(0.2)
3.0 ± 0.2
Front
(0.118 ± 0.008)
4.5 ± 0.2
Rear
(0.177 ± 0.008)
Brake disc runout
Master cylinder bore
———
Front
Rear
Master cylinder piston diam.
Front
Rear
Brake caliper cylinder bore
Front
Rear
Brake caliper piston diam.
Front
Rear
Brake fluid type
NOTE
* 12.700 – 12.743
(0.5000 – 0.5017)
12.700 – 12.743
(0.5000 – 0.5017)
* 12.657 – 12.684
(0.4983 – 0.4994)
12.657 – 12.684
(0.4983 – 0.4994)
27.000 – 27.050
(1.0630 – 1.0650)
27.000 – 27.050
(1.0630 – 1.0650)
26.900 – 26.950
(1.0591 – 1.0610)
26.900 – 26.950
(1.0591 – 1.0610)
DOT 4
LIMIT
———
———
2.5
(0.098)
4.0
(0.16)
0.30
(0.012)
———
———
———
———
———
———
———
———
———
DR-Z400EY (E-24 MODEL)
ITEM
Wheel rim runout
Wheel axle runout
Wheel rim size
STANDARD
Axial
———
Radial
———
Front
———
Rear
———
Front
Rear
1.60 × 21
2.15 × 18
9-9
LIMIT
2.0
(0.08)
2.0
(0.08)
0.25
(0.010)
0.25
(0.010)
———
———
TIRE
ITEM
Cold inflation tire pressure
(Solo riding)
Tire size
Tire tread depth
STANDARD/SPECIFICATION
2
Front
Rear
Front
Rear
* 125 kPa (1.25 kgf/cm , 18 psi)
* 125 kPa (1.25 kgf/cm2, 18 psi)
* 80/100-21 51P
* 120/90-18 65P
Front
———
Rear
———
SUSPENSION
ITEM
Front fork stroke
STANDARD/SPECIFICATION
288
(11.3)
Front fork spring free length
510.6
(20.1)
Front fork oil level
122
(without spring)
(4.8)
Front fork oil type
SUZUKI FORK OIL SS-05
or an equivalent fork oil
Front fork oil capacity
720 ml
(each leg)
(24.3/25.4 US/Imp oz)
Front fork damping force adjuster Rebound
15th clicks turn back
Compression
12th clicks turn back
Rear shock absorber gas
900 kPa
pressure
(9.0 kgf/cm2, 128 psi)
Rear shock absorber oil type
SUZUKI REAR SUSPENSION OIL SS-25
or an equivalent suspension oil
Rear shock absorber oil capacity
380 ml
(12.8/13.4 US/Imp oz)
Rear shock absorber spring
258.0
pre-set length
(10.2)
Rear shock absorber damping
Rebound
13th clicks turn back
force adjuster
Compression
12th clicks turn back
LIMIT
———
———
———
———
4.0 mm
(0.16 in)
4.0 mm
(0.16 in)
Unit: mm (in)
LIMIT
———
500
(19.7)
———
———
———
———
———
———
———
———
———
———
———
9-10
DR-Z400EY (E-24 MODEL)
ITEM
STANDARD/SPECIFICATION
LIMIT
295
(11.6)
———
———
0.3
(0.01)
SPECIFICATION
NOTE
Rear wheel travel
Swingarm pivot shaft runout
ELECTRICAL
ITEM
Spark plug
Type
Gap
Spark performance
Ignition coil resistance
DENSO: U24ESR-N
NGK: CR8E
0.7 – 0.8 mm
(0.028 – 0.031 mm)
Over 8 mm (0.3 in) at 1 atm.
Primary
0.1 – 1.0 Ω
Secondary
12 – 20 kΩ
Ignition coil primary peak voltage
Generator coil resistance
More than 150 V
Charging
Signal coil
Pick-up coil
0.50 – 1.25 Ω
0.05 – 0.20 Ω
390 – 600 Ω
Terminal –
Ground
Plug cap –
Terminal
+ : B/W,
- : B/Y
Y –Y
B–W
G – Bl
Pick-up coil peak voltage
More than 5.0 V
+ : Bl, - : G
Signal coil peak voltage
More than 1.4 V
+ : B, - : W
More than 75 V (AC) at 5 000 r/min.
Y –Y
Generator no-load voltage
(when engine is cold)
Regulated voltage
Generator Max. output
Starter relay resistance
Battery
Type designation
Capacity
Fuse size
13.5 – 15.0 V at 5 000 r/min.
200 W at 5 000 r/min.
3–5Ω
GT7B-4
12 V 23.4 kC (6.5 Ah)/10 HR
* 20 A
WATTAGE
Unit: W
ITEM
Headlight
Brake light/Taillight
Turn signal light
Speedometer light
Neutral indicator light
High beam indicator light
Turn signal indicator light
SPECIFICATION
HI
LO
* 60
* 55
* 21/5
* 21
* LED
*2
*2
*2
DR-Z400EY (E-24 MODEL)
FUEL + OIL
ITEM
SPECIFICATION
Gasoline used should be graded 95 octane or
higher. An unleaded gasoline is recommended.
Fuel type
Fuel tank including reserve
reserve
Engine oil type
Engine oil capacity
10.0 L
(2.6/2.2 US/lmp gal)
2.3 L
(0.6/0.5 US/lmp gal)
SAE 10W/40, API SF or SG
1 700 ml
Change
(1.8/1.5 US/lmp qt)
1 800 ml
Filter change
(1.9/1.6 US/lmp qt)
1 900 ml
Overhaul
(2.0/1.7 US/lmp qt)
NOTE
9-11
9-12
DR-Z400EY (E-24 MODEL)
SIDE-STAND/IGNITION INTERLOCK
SYSTEM
This side-stand/ignition interlock system is to prevent starting
the motorcycle with the side-stand left down.
SIDE-STAND RELAY INSPECTION
First check the insulation between D and E terminals with the
tester. Then apply 12 V to terminals D and C (+ to D and - to
C) and check the continuity between D and E. If there is no
continuity, replace the turn signal/side-stand relay with a new one.
[ 09900-25008: Multi circuit tester set
Side-stand relay
Diode
< Tester knob indication: Continuity test (>)
Turn
signal
relay
DIODE INSPECTION
Measure the voltage between the terminals using the multi circuit tester. Refer to the following table.
- Probe of
tester to:
Unit: V
+ Probe of tester to:
C, B
C, B
A
A
1.4 – 1.5
0.4 – 0.6
[ 09900-25008: Multi circuit tester set
Tester knob indication: Diode test (=
=)
NOTE:
If the multi circuit tester reads under 1.4 V, replace its battery
when the tester probes are not connected.
NEUTRAL SWITCH (9-13)
SIDE-STAND SWITCH INSPECTION
Disconnect the side-stand switch lead wire coupler and measure
the voltage between Green and Black/White lead wires.
[ 09900-25008: Multi circuit tester set
Tester knob indication: Diode test (=)
NOTE:
If the multi circuit tester reads under 1.4 V, replace its battery
when the tester probes are not connected.
Green
Black/White
(+ Probe) (- Probe)
ON
(Up-right position)
0.4 – 0.6 V
OFF
(Down position)
1.4 – 1.5 V
DR-Z400EY (E-24 MODEL)
9-13
SWITCHES
Measure each switch for continuity using a multi circuit tester. If any abnormality is found, replace the respective switch assemblies with a new one.
[ 09900-25008: Multi circuit tester set
STARTER BUTTON
IGNITION SWITCH
Color
R
Position
Color
O
Position
Color
O/Y
Position
Color
O/W
Position
TURN SIGNAL SWITCH
Lg
NEUTRAL SWITCH
Lbl
B
L (˜)
PUSH
R (™)
Y/W
W
Y
HI (–)
LO (—)
PASSING LIGHT SWITCH
Color
Position
O/R
Y
š
PUSH
FRONT BRAKE LIGHT SWITCH
Color
Position
B
B/R
ON
OFF
REAR BRAKE LIGHT SWITCH
Color
Position
ON
OFF
Color
Position
Bl
ON
OFF
DIMMER SWITCH
Color
B/W
š
PUSH
OFF (¡)
RUN (Ÿ)
Position
B/Bl
HORN BUTTON
ENGINE STOP SWITCH
Position
Y/G
š
PUSH
ON
OFF
Color
O/W
O
W/B
WIRE COLOR
B : Black
Bl : Blue
Lbl : Light blue
Lg : Light green
O : Orange
R : Red
W : White
Y : Yellow
B/Bl : Black with Blue tracer
B/R : Black with Red tracer
B/W : Black with White tracer
O/R : Orange with Red tracer
O/W: Orange with White tracer
O/Y : Orange with Yellow tracer
W/B : White with Black tracer
Y/G : Yellow with Green tracer
Y/W : Yellow with White tracer
Ground
9-14
DR-Z400EY (E-24 MODEL)
SPEEDOMETER
PARTS NAMES
1
2
3
4
TIME
CLOCK
N
km/h
TRIP
TRIP
TOTAL
A
TRIP
TIME
TRIP
TIME/
TRIP
B
+
5
6
7
8
9
0
A
B
C
–
SELECT
SET
MODE
ADJUST
Turn signal indicator light
Neutral indicator light
High beam indicator light
Engine coolant temperature
indicator light
Tripmeter A
Speedometer
Clock/stopwatch/timer
Tripmeter B/odometer
ADJUST button
SET TIME/TRIP button
SET TRIP button
MODE TIME button
MODE TRIP button
OPERATING PROCEDURE
INITIAL DISPLAY
When the ignition switch is set to ON, all indicators light up for
one second.
NOTE:
If the power supply is cut (e.g., when the battery is replaced):
The speedometer, clock, tripmeter A and odometer are displayed after the initial display appears.
Since the clock resets to “1:00 00”, it will need to be readjusted.
The odometer, tripmeter A and B, tripmeter calculation modes
(addition and subtraction), and the calibration coefficients are
not affected.
CHANGING THE DISPLAY MODE
With each press of the MODE TRIP button, the display changes
between tripmeter A, tripmeter B and the odometer as shown
below.
TRIP TIME
MODE
Tripmeter A
TRIP
A
Odometer
TOTAL
Tripmeter A
TRIP
A
Tripmeter B
TRIP
B
NOTE:
The cursor ( — ) indicates that the setting can be changed.
The cursor appears at only one position at a time.
Tripmeter A
TRIP
A
Tripmeter B
TRIP
B
DR-Z400EY (E-24 MODEL)
With each press of the MODE TIME button, the display changes
between the clock, the stopwatch and the timer as shown below.
Clock
TRIP TIME
TIME
CLOCK
Stopwatch
TIME
CLOCK
Timer
TIME
CLOCK
MODE
"
To avoid riding with only one hand, do not operate the
buttons while riding.
NOTE:
Make sure not to press more than one button at a time.
Before performing the operations described in this section,
be sure to start the engine in order to prevent the battery from
being drained.
ODOMETER
Displays the total distance travelled
TRIP TIME
MODE
TOTAL
TRIPMETER
Displays the distance travelled since the tripmeter was last
reset.
NOTE:
The tripmeters A and B can be used independently.
TRIP TIME
TRIP
MODE
A
TRIP
B
Switching between addition and subtraction modes
TIME/
TRIP TRIP
Subtraction
mode
TRIP
A
No sign indicates
addition mode.
TRIP
Make addition or subtraction calculations.
B
SET
Press the SET TRIP button to reset the tripmeter.
TIME/
TRIP TRIP
SET
Displays the distance with a calibration coefficient (70 – 130 %) applied
TIME/
TRIP TRIP
Hold down the SET TIME/TRIP
button for three seconds.
TRIP
A
+
Select the calibration
coefficient.
TRIP
B
SET
–
ADJUST
Return to the normal
display.
TIME/
TRIP TRIP
SET
+
–
ADJUST
9-15
9-16
DR-Z400EY (E-24 MODEL)
CLOCK
Displays the time (hours, minutes and seconds) on a 24-hour clock
TRIP TIME
TIME
CLOCK
MODE
Setting the time
TRIP TIME
Hold down the MODE TIME
button for three seconds.
The setting that is flashing
can be changed.
TIME
CLOCK
MODE
+
sec.
min.
Select the correct time.
No
Flashing
hour
TIME/
TRIP TRIP
SET
–
Return to the
normal display.
ADJUST
TRIP TIME
MODE
STOPWATCH
This 24-hour stopwatch displays the minutes, seconds and
1/100 seconds up to one hour. After one hour, the hours, minutes and seconds are displayed.
TRIP TIME
TIME
MODE
TIME/
TRIP TRIP
TIME/
TRIP TRIP
TIME
Start
Hold down the button for three
seconds to reset the stopwatch.
TIME
Stop
SET
SET
TIMER
This 24-hour timer (or countdown timer) displays the minutes,
seconds and 1/100 seconds up to one hour. After one hour,
the hours, minutes and seconds are displayed.
TRIP TIME
TIME
MODE
TIME/
TRIP TRIP
Set the timer.
SET
The setting that is flashing can be changed.
+
Select the time that the
timer will countdown from.
TIME/
TRIP TRIP
Stop
SET
TIME/
TRIP TRIP
–
ADJUST
sec.
min.
hour
SET
Finish entering settings.
Hold down the button for three
seconds to reset the timer.
TIME/
TRIP TRIP
TIME/
TRIP TRIP
SET
TIME/
TRIP TRIP
TIME
SET
TIME
Start
SET
B
B/W
Y
B/W
W
FRONT TURN SIGNAL
LIGHT L
HEADLIGHT
B
B/W
FRONT TURN SIGNAL
LIGHT R
B
B/W
Lg
B/W
HI
NU
TU
DIMMER
SWITCH
HI
LO
PUSH
PASSING LIGHT
SWITCH
PUSH
HORN
BUTTON
TURN SIGNAL
LIGHT SWITCH
L
PUSH
R
CLUTCH
LEVER
POSITION
SWITCH
ON
OFF
HORN
B/R
B/W
B/O
B/Bl
B
B/Lg
Y
B/W
O
Bl/B
B
Lg
SPEEDOMETER
PUSH
NEUTRAL
SWITCH
OFF
ON
B/R
OFF
ON
IGNITION COIL
TURN SIGNAL/
SIDE-STAND
RELAY
Bl/B
Bl
HI : HIGH BEAM INDICATOR LIGHT
NU : NEUTRAL INDICATOR LIGHT
TU : TURN SIGNAL INDICATOR LIGHT
Bl
L
OFF
ON
IGNITION SWITCH
FRONT BRAKE
LIGHT SWITCH
B/W
W
G
Y/G
B/Y
B/W
R
O
Gr
B/W
STARTER
BUTTON
REGULATOR/
RECTIFIER
PUSH
FREE
SIDE-STAND
SWITCH
GENERATOR
ON
OFF
REAR BRAKE
LIGHT SWITCH
CDI UNIT
STARTER
MOTOR
STARTER
RELAY
FUSE
20A
R
OFF
RUN
Y/B
O
Lbl
Lb
O
W/B
O
W/B
G
B/W
G
B/W
W
B
G
Bl
Y
Y
Y
R
O
O
B/W
B/W
Y
W
Y/W
Y
B/Bl
B/W
Lg
Lbl
Lb
B
O/B
Y/W
Y
B/Bl
B/W
Lg
Lbl
Lb
B
O/R
O
B/Bl
Y/G
Y/G
Y/G
R
O
O
O
O/Y
O/W
B
Y/G
O
O/B
Y/W
O
O/W
W/B
Bl
L
B/W
Y/B
R
O
Gr
R
O
Y
Y
Y
R
B/W
Y
Y
Y
R
B/W
W
G
B
Bl
Y
Bl
R/W
Bl/W
G
O/W
BATTERY
B/W
B/W
B/W
W
R
B
B/W
REAR TURN SIGNAL
LIGHT L
Gr
B/W
W/B
BRAKE LIGHT/TAILLIGHT
B
B/W
REAR TURN SIGNAL
LIGHT R
WIRE COLOR
: Black
B
Bl : Blue
: Green
G
Gr : Gray
Lbl : Light blue
Lg : Light green
: Orange
O
: Red
R
W : White
: Yellow
Y
B/Bl : Black with Blue tracer
B/Lg : Black with Light green tracer
B/R : Black with Red tracer
B/W : Black with White tracer
B/Y : Black with Yellow tracer
Bl/B : Blue with Black tracer
O/B : Orange with Black tracer
O/W : Orange with White tracer
R/W : Red with White tracer
W/B : White with Black tracer
Y/B : Yellow with Black tracer
Y/G : Yellow with Green tracer
Y/W : Yellow with White tracer
B
B/W
O
B/W
W/B
Lg
B/W
THROTTLE
POSITION
SENSOR
WIRING DIAGRAM
R
Bl
Y
B
Bl
Y
B/W
ENGINE
STOP
SWITCH
DR-Z400EY (E-24 MODEL)
9-17
9-18
DR-Z400EY (E-24 MODEL)
WIRE, CABLE AND HOSE ROUTING
WIRE ROUTING
Clamp
Wire harness
battery lead wire
Clamp
battery terminal
battery terminal
Wire harness
battery lead wire
Side stand switch
Neutral switch
Fuse
Clamp
battery lead wire
battery lead wire
Wire harness
Starter moter
Clamp
VIEW
Clamp
Clamp
Engine stop switch
Throttle cable
Clutch cable
Clamp
Wire harness
Clamp
Turn signal light
Brake light/taillight
–
Starter motor terminal
1 Set + battery and - battery coupler between frame and fuse holder.
2 Push the couplers into the frame.
Front brake light switch
Clamp
DR-Z400EY (E-24 MODEL)
Clamp
Clamp
Clamp
Handlebar switch (R)
Wire harness
Handlebar switch (L)
Clutch switch
Clutch cable
Clamp
Wire harness
Engine stop switch
Throttle cable
Clamp
Generator
Regulator/rectifier
Side stand switch
Neutral switch
battery lead wire
Throttle position sensor
Generator
Regulator/rectifier
Side stand switch
Neutral switch
battery lead wire
Clamp
Generator
Neutral switch
Side stand switch
Clamp
Clamp
1 Front turn signal light (L) lead wire must be passed over the clutch cable.
2 Set the regulator/rectifier, and throttle position sensor couplers in this order, under the frame.
9-19
Breather hose
VIEW
Inlet hose
Cable guide
Clutch cable
Overflow hose
Overflow hose
Radiator hose
VIEW
Cable guide
1
2
3
4
Throttle cable
Clutch cable
VIEW
Clutch cable
Clutch cable must be passed outside overflow hose and inlet hose.
Clutch cable must be passed to the right of throttle cable and left of breather hose.
Clutch cable must be passed to the left of breather hose.
Set boot to clutch cable after clutch cable setting to stopper.
Front brake hose
Throttle cable
Front brake hose
Throttle cable
Clamp
Clutch cable
9-20
DR-Z400EY (E-24 MODEL)
CABLE ROUTING
DR-Z400EY (E-24 MODEL)
9-21
SPEEDOMETER CABLE ROUTING
(0.2 –
0.4 in
)
Speedometer assembly
5–1
0 mm
A
Headlight bracket
Clamp
Speedometer cable
Speedometer gearbox
stopper
VIEW
Speedometer cable
Front fork stopper
9-22
DR-Z400EY (E-24 MODEL)
FRONT BRAKE HOSE ROUTING
Align the green mark on
the brake hose with the
lower end of the brake
hose clamp.
Green mark
VIEW
1 After touching the brake hose union to the stopper, tighten the union bolt to the specified torque.
2 Set brake hose in front of throttle cables.
3 Set brake hose in front of clutch cable.
DR-Z400/EK1 (’01-MODEL)
10-1
DR-Z400/EK1 (’01-MODEL)
This chapter describes specifications, service data and servicing procedures which differ from
those of the DR-Z400/EY (’00-MODEL).
NOTE:
* Any differences between DR-Z400/EY (’00-MODEL) and DR-Z400/EK1 (’01-MODEL) in specifications and service data are clearly indicated with the asterisk mark (*).
* Please refer to the chapter 1 through 9 for details which are not given in this chapter.
CONTENTS
SPECIFICATIONS .................................................................................. 10- 2
DR-Z400/E (For E-01, 03 and 28) ..................................................... 10- 2
DR-Z400E (For E-24) ........................................................................ 10- 4
SERVICE DATA ...................................................................................... 10- 6
DR-Z400/E (For E-01, 03 and 28) ..................................................... 10- 6
DR-Z400E (For E-24) ........................................................................ 10-14
BATTERY (DR-Z400E) ........................................................................... 10-22
10
10-2
DR-Z400/EK1 (’01-MODEL)
SPECIFICATIONS
DR-Z400/E (For E-01, 03 and 28)
DIMENSIONS AND DRY MASS
Overall length .........................................................
Overall width ..........................................................
Overall height .........................................................
Wheelbase .............................................................
Ground clearance ..................................................
Seat height .............................................................
Dry mass ................................................................
2 235 mm (88.0 in)
825 mm (32.5 in)
1 245 mm (49.0 in)
1 475 mm (58.1 in)
325 mm (12.8 in)
945 mm (37.2 in)
113 kg (249 lbs) ..... DR-Z400
119 kg (262 lbs) ..... DR-Z400E
ENGINE
Type........................................................................
Number of cylinders ...............................................
Bore .......................................................................
Stroke .....................................................................
Piston displacement ..............................................
Compression ratio ..................................................
Carburetor ..............................................................
Air cleaner ..............................................................
Starter system........................................................
Lubrication system .................................................
Four-stroke, liquid-cooled, DOHC
1
90.0 mm (3.543 in)
62.6 mm (2.465 in)
398 cm3 (24.3 cu. in)
12.2 : 1
KEIHIN FCR39
Polyurethane foam element
Primary kick ..... DR-Z400
Electric ..... DR-Z400E
Dry sump
TRANSMISSION
Clutch .....................................................................
Transmission ..........................................................
Gearshift pattern ....................................................
Primary reduction ratio ..........................................
Final reduction ratio ...............................................
Gear ratios, Low ....................................................
2nd ....................................................
3nd ....................................................
4nd ....................................................
Top .....................................................
Drive chain .............................................................
Wet multi-plate type
5-speed constant mesh
1-down, 4-up
2.960 (74/25)
3.357 (47/14)
2.285 (32/14)
1.733 (26/15)
1.375 (22/16)
1.090 (24/22)
0.863 (19/22)
RK520KZO, 112 links
DR-Z400/EK1 (’01-MODEL)
10-3
CHASSIS
Front suspension ...................................................
Rear suspension ....................................................
Front suspension stroke ........................................
Rear wheel travel ...................................................
Caster ....................................................................
Trail .........................................................................
Steering angle .......................................................
Turning radius ........................................................
Front brake .............................................................
Rear brake .............................................................
Front tire size .........................................................
Rear tire size ..........................................................
Telescopic, coil spring, oil damped, rebound damping
force 18-way adjustable, compression damping force
14-way adjustable
Link type, coil spring, oil damped, spring preload fully
adjustable, rebound damping force 21-way adjustable,
compression damping force 26-way adjustable
288 mm (11.3 in)
295 mm (11.6 in)
27° 20’
112 mm (4.41 in)
45° (right & left)
2.2 m (7.2 ft)
Disc brake
Disc brake
80/100-21 51M
110/100-18 64M
ELECTRICAL
Ignition type ...........................................................
Ignition timing .........................................................
Spark plug ..............................................................
Electronic ignition (CDI)
7° BTDC at 1 800 r/min
NGK: CR8E
DENSO: U24ESR-N
Battery ................................................................... * 12 V 21.6 kC (6 Ah)/10HR ..... DR-Z400E
Generator ............................................................... Three-phase A.C. generator
Fuse ....................................................................... 10 A ..... DR-Z400E
Headlight ................................................................ 12 V 55 W
Taillight ................................................................... LED
CAPACITIES
Fuel tank, including reserve ...................................
reserve ..................................................
Engine oil, oil change ............................................
oil and filter change .............................
engine overhaul ...................................
Front fork oil ...........................................................
Engine coolant .......................................................
10.0 L (2.6 US gal, 2.2 Imp gal)
2.3 L (0.6 US gal, 0.5 Imp gal)
1 700 ml (1.8 US qt, 1.5 Imp qt)
1 800 ml (1.9 US qt, 1.6 Imp qt)
1 900 ml (2.0 US qt, 1.7 Imp qt)
720 ml (24.3 US oz, 25.4 Imp oz)
1 250 ml (1.3 US qt, 1.1 Imp qt)
NOTE:
These specifications are subject to change without notice.
10-4
DR-Z400/EK1 (’01-MODEL)
DR-Z400E (For E-24)
DIMENSIONS AND DRY MASS
Overall length .........................................................
Overall width ..........................................................
Overall height .........................................................
Wheelbase .............................................................
Ground clearance ..................................................
Seat height .............................................................
Dry mass ................................................................
2 310 mm (90.9 in)
825 mm (32.5 in)
1 245 mm (49.0 in)
1 475 mm (58.1 in)
315 mm (12.4 in)
935 mm (36.8 in)
127 kg (279 lbs)
ENGINE
Type........................................................................
Number of cylinders ...............................................
Bore .......................................................................
Stroke .....................................................................
Piston displacement ..............................................
Compression ratio ..................................................
Carburetor ..............................................................
Air cleaner ..............................................................
Starter system........................................................
Lubrication system .................................................
Four-stroke, liquid-cooled, DOHC
1
90.0 mm (3.543 in)
62.6 mm (2.465 in)
398 cm3 (24.3 cu. in)
12.2 : 1
KEIHIN FCR39
Polyurethane foam element
Electric
Dry sump
TRANSMISSION
Clutch .....................................................................
Transmission ..........................................................
Gearshift pattern ....................................................
Primary reduction ratio ..........................................
Final reduction ratio ...............................................
Gear ratios, Low .....................................................
2nd .....................................................
3rd ......................................................
4th .......................................................
Top ......................................................
Drive chain .............................................................
Wet multi-plate type
5-speed constant mesh
1-down, 4-up
2.960 (74/25)
3.357 (47/14)
2.285 (32/14)
1.733 (26/15)
1.375 (22/16)
1.090 (24/22)
0.863 (19/22)
RK520KZO, 112 links
DR-Z400/EK1 (’01-MODEL)
10-5
CHASSIS
Front suspension ...................................................
Rear suspension ....................................................
Front fork stroke .....................................................
Rear wheel travel ...................................................
Caster ....................................................................
Trail .........................................................................
Steering angle .......................................................
Turning radius ........................................................
Front brake .............................................................
Rear brake .............................................................
Front tire size .........................................................
Rear tire size ..........................................................
Telescopic, coil spring, oil damped, rebound damping
force 18-way adjustable, compression damping force
14-way adjustable
Link type, coil spring, oil damped, spring preload fully
adjustable, rebound damping force 21-way adjustable,
compression damping force 26-way adjustable
288 mm (11.3 in)
295 mm (11.6 in)
27° 20’
112 mm (4.41 in)
45° (right & left)
2.2 m (7.2 ft)
Disc brake
Disc brake
80/100-21 51P
120/90-18 65P
ELECTRICAL
Ignition type ...........................................................
Ignition timing .........................................................
Spark plug ..............................................................
Electronic ignition (CDI)
7° BTDC at 1 800 r/min
NGK: CR8E
DENSO: U24ESR-N
Generator ............................................................... Three-phase A.C. generator
Battery ................................................................... * 12 V 21.6 kC (6 Ah)/10 HR
Fuse ....................................................................... 20 A
Headlight ................................................................ 12 V 60/55 W
Brake light/Taillight ................................................. 12 V 21/5 W
Turn signal light ...................................................... 12 V 21 W
Speedometer light.................................................. LED
Neutral indicator light ............................................. 12 V 2 W
High beam indicator light ....................................... 12 V 2 W
Turn signal indicator light ....................................... 12 V 2 W
CAPACITIES
Fuel tank, including reserve ..................................
reserve ..................................................
Engine oil, oil change ............................................
oil and filter change .............................
engine overhaul ...................................
Front fork oil ...........................................................
Engine coolant .......................................................
10.0 L (2.6 US gal, 2.2 Imp gal)
2.3 L (0.6 US gal, 0.5 Imp gal)
1 700 ml (1.8 US qt, 1.5 Imp qt)
1 800 ml (1.9 US qt, 1.6 Imp qt)
1 900 ml (2.0 US qt, 1.7 Imp qt)
720 ml (24.3 US oz, 25.4 Imp oz)
1 250 ml (1.3 US qt, 1.1 Imp qt)
NOTE:
These specifications are subject to change without notice.
10-6
DR-Z400/EK1 (’01-MODEL)
SERVICE DATA
DR-Z400/E (For E-01, 03 and 28)
VALVE + GUIDE
Unit: mm (in)
ITEM
Valve diam.
IN.
EX.
Tappet clearance (when cold)
IN.
EX.
Valve guide to valve stem
clearance
IN.
EX.
Valve stem deflection
Valve guide I.D.
Valve stem O.D.
IN. & EX.
IN. & EX.
IN.
EX.
Valve stem runout
Valve head thickness
Valve seat width
Valve head radial runout
Valve spring free length
(IN. & EX.)
STANDARD
36
(1.42)
29
(1.14)
0.10 – 0.20
(0.0039 – 0.0078)
0.20 – 0.30
(0.0078 – 0.0118)
0.010 – 0.037
(0.0004 – 0.0015)
0.030 – 0.057
(0.0012 – 0.0022)
———
5.000 – 5.012
(0.1969 – 0.1973)
4.975 – 4.990
(0.1959 – 0.1965)
4.955 – 4.970
(0.1951 – 0.1957)
IN. & EX.
———
IN. & EX.
———
IN. & EX.
0.9 – 1.1
(0.035 – 0.043)
IN. & EX.
———
INNER
———
OUTER
———
Valve spring tension (IN. & EX.)
INNER
OUTER
56 – 64 N
(5.6 – 6.4 kgf, 12.3 – 14.1 lbs)
at length 27.4 mm (1.08 in)
126 – 145 N
(12.6 – 14.5 kgf, 27.7 – 32.0 lbs)
at length 30.9 mm (1.22 in)
LIMIT
———
———
———
———
———
———
0.35
(0.014)
———
———
———
0.05
(0.002)
0.5
(0.02)
———
0.03
(0.001)
32.6
(1.28)
36.3
(1.43)
———
———
DR-Z400/EK1 (’01-MODEL)
CAMSHAFT + CYLINDER HEAD
Unit: mm (in)
ITEM
Cam height
IN.
EX.
Camshaft journal oil clearance
Camshaft journal holder I.D.
Camshaft journal O.D.
IN. & EX.
IN. & EX.
IN. & EX.
STANDARD
36.910 – 36.960
(1.4531 – 1.4551)
36.880 – 36.930
(1.4520 – 1.4539)
0.019 – 0.053
(0.0007 – 0.0021)
22.012 – 22.025
(0.8666 – 0.8671)
21.972 – 21.993
(0.8653 – 0.8659)
Camshaft runout
15th pin
———
Cylinder head cover distortion
———
De-compression cable play
(DR-Z400)
0 – 0.1
(0 – 0.004)
Piston diam.
Piston ring free end gap
(
Piston ring end gap
R
2nd
R
1st
2nd
Piston ring to groove clearance
)
———
1st
———
Unit: mm (in)
STANDARD
1 000 kPa
10.0 kgf/cm2
142 psi
0.030 – 0.040
(0.0012 – 0.0016)
90.000 – 90.015
(3.5433 – 3.5439)
89.965 – 89.980
(3.5419 – 3.5425)
Measure at 15 mm (0.6 in) from the skirt end.
Cylinder distortion
———
———
CYLINDER + PISTON + PISTON RING
Cylinder bore
LIMIT
36.610
(1.4413)
36.580
(1.4402)
0.150
(0.0059)
0.10
(0.004)
———
0.05
(0.002)
0.05
(0.002)
———
Cam chain pin (at arrow “3”)
Cylinder head distortion
ITEM
Compression pressure
(Automatic de-comp. actuated)
Except for DR-Z400
Piston to cylinder clearance
10-7
6.9
(0.27)
11.5
Approx.
(0.45)
0.08 – 0.20
(0.003 – 0.008)
0.08 – 0.20
(0.003 – 0.008)
Approx.
1st
———
2nd
———
LIMIT
———
0.120
(0.0047)
Nicks or
Scratches
89.880
(3.5386)
0.05
(0.002)
5.5
(0.22)
9.2
(0.36)
0.50
(0.020)
0.50
(0.020)
0.180
(0.007)
0.150
(0.006)
10-8
DR-Z400/EK1 (’01-MODEL)
ITEM
STANDARD
Piston ring groove width
1st
2nd
Oil
Piston ring thickness
1st
2nd
Piston pin bore
Piston pin O.D.
0.78 – 0.80
(0.0307 – 0.0315)
1.30 – 1.32
(0.0512 – 0.0520)
0.81 – 0.83
(0.0319 – 0.0327)
2.01 – 2.03
(0.0791 – 0.0799)
0.71 – 0.76
(0.0280 – 0.0299)
1.08 – 1.10
(0.0425 – 0.0433)
0.77 – 0.79
(0.0303 – 0.0311)
20.002 – 20.008
(0.7875 – 0.7877)
19.995 – 20.000
(0.7872 – 0.7874)
CONROD + CRANKSHAFT
ITEM
Conrod small end I.D.
Conrod deflection
Conrod big end side clearance
Conrod big end width
Crank web to web width
Crankshaft runout
LIMIT
———
———
———
———
———
———
———
20.030
(0.7886)
19.980
(0.7866)
Unit: mm (in)
STANDARD
20.010 – 20.018
(0.7878 – 0.7881)
———
0.30 – 0.65
(0.012 – 0.026)
21.95 – 22.00
(0.864 – 0.866)
62.0 ± 0.1
(2.441 ± 0.004)
———
LIMIT
20.040
(0.7890)
3.0
(0.12)
1.0
(0.04)
———
———
0.08
(0.003)
OIL PUMP
ITEM
Oil pump reduction ratio
Oil pressure (at 60°C, 140°F)
STANDARD
LIMIT
2.220 (74/25 × 20/16 × 12/20)
Above 40 kPa (0.4 kgf/cm2, 5.7 psi)
Below 140 kPa (1.4 kgf/cm2, 19.9 psi)
at 3 000 r/min.
———
———
DR-Z400/EK1 (’01-MODEL)
CLUTCH
Unit: mm (in)
ITEM
Clutch cable play
STANDARD
10 – 15
(0.4 – 0.6)
2.92 – 3.08
(0.115 – 0.121)
13.7 – 13.8
(0.539 – 0.543)
Drive plate thickness
(No. 1 & No. 2)
Drive plate claw width
(No. 1 & No. 2)
Driven plate distortion
LIMIT
———
2.62
(0.103)
13.2
(0.520)
0.10
(0.004)
49.9
(1.96)
———
Clutch spring free length
———
TRANSMISSION + DRIVE CHAIN
ITEM
Primary reduction ratio
Final reduction ratio
Gear ratios
Low
2nd
3rd
4th
Top
Shift fork to groove clearance
Shift fork groove width
Shift fork thickness
Drive chain
No.1, No.2
& No.3
No.1, No.2
& No.3
Type
Links
Unit: mm (in) Except ratio
STANDARD
2.960 (74/25)
3.357 (47/14)
2.285 (32/14)
1.733 (26/15)
1.375 (22/16)
1.090 (24/22)
0.863 (19/22)
0.1 – 0.3
(0.004 – 0.012)
4.8 – 4.9
(0.189 – 0.193)
4.6 – 4.7
(0.181 – 0.185)
RK520KZO
112
Drive chain slack
LIMIT
———
———
———
———
———
———
———
0.5
(0.020)
———
———
———
———
319.4
(12.57)
———
20-pitch length
40 – 50
(1.6 – 2.0)
———
CARBURETOR
SPECIFICATION
ITEM
Carburetor type
Bore size
I.D. No
Idle r/min.
Float height
10-9
DR-Z400
E-01
E-03, 28
KEIHIN
←
FCR39H
39 mm
←
(1.5 in)
29F0
29F1
1 800 ± 100 r/min
←
9.0 ± 1.0 mm
←
(0.35 ± 0.04 in)
DR-Z400E
E-01
E-03, 28
←
←
←
←
29F3
←
29F4
←
←
←
10-10
DR-Z400/EK1 (’01-MODEL)
SPECIFICATION
ITEM
Main jet
Jet needle
Needle jet
Slow jet
Slow air jet
Air jet
Pilot screw
Throttle cable play
(pulling cable)
(M.J.)
(J.N.)
(N.J.)
(S.J.)
(S.A.J.)
(A.J.)
(P.S.)
DR-Z400
E-01
E-03, 28
#165
#142
OBDXP-4th
←
2.9 mm
←
(0.11 in)
#45
←
#60
←
#90
←
1½ turns back
←
2 – 4 mm
←
(0.08 – 0.16 in)
DR-Z400E
E-01
E-03, 28
#165
#142
←
←
←
←
←
←
←
←
←
←
←
←
←
←
RADIATOR + ENGINE COOLANT
ITEM
Radiator cap valve opening
pressure
Engine coolant type
Engine coolant capacity
STANDARD/SPECIFICATION
95 – 125 kPa
(0.95 – 1.25 kgf/cm2, 13.5 – 17.8 psi)
Use an anti-freeze/coolant compatible with aluminum radiator, mixed with distilled water only, at the
ratio of 50 : 50.
1 250 ml
(1.3/1.1 US/Imp qt)
BRAKE + WHEEL
ITEM
Rear brake pedal height
Brake disc thickness
Unit: mm (in)
STANDARD/SPECIFICATION
5
(0.2)
3.0 ± 0.2
Front
(0.118 ± 0.008)
4.5 ± 0.2
Rear
(0.177 ± 0.008)
Brake disc runout
Master cylinder bore
———
Front
Rear
Master cylinder piston diam.
NOTE
Front
Rear
11.000
(0.4331
12.700
(0.5000
10.957
(0.4314
12.657
(0.4983
–
–
–
–
–
–
–
–
11.043
0.4348)
12.743
0.5017)
10.984
0.4324)
12.684
0.4994)
LIMIT
———
2.5
(0.098)
4.0
(0.16)
0.30
(0.012)
———
———
———
———
DR-Z400/EK1 (’01-MODEL)
ITEM
Brake caliper cylinder bore
Front
Rear
Brake caliper piston diam.
Front
Rear
Brake fluid type
Wheel rim runout
Wheel axle runout
Wheel rim size
STANDARD
27.000 –
(1.0630 –
27.000 –
(1.0630 –
26.900 –
(1.0591 –
26.900 –
(1.0591 –
DOT 4
10-11
LIMIT
27.050
1.0650)
27.050
1.0650)
26.950
1.0610)
26.950
1.0610)
Axial
———
Radial
———
Front
———
Rear
———
Front
Rear
1.60 × 21
2.15 × 18
———
———
———
———
———
2.0
(0.08)
2.0
(0.08)
0.25
(0.010)
0.25
(0.010)
———
———
TIRE
ITEM
Cold inflation tire pressure
(Solo riding)
Tire size
Tire tread depth
STANDARD/SPECIFICATION
Front
Rear
Front
Rear
100 kPa (1.0 kgf/cm2, 14 psi)
100 kPa (1.0 kgf/cm2, 14 psi)
80/100-21 51M
110/100-18 64M
Front
———
Rear
———
SUSPENSION
ITEM
Front fork stroke
LIMIT
———
———
———
———
4.0 mm
(0.16 in)
4.0 mm
(0.16 in)
Unit: mm (in)
STANDARD/SPECIFICATION
288
(11.3)
Front fork spring free length
510.6
(20.1)
Front fork oil level
122
(without spring)
(4.8)
Front fork oil type
SUZUKI FORK OIL SS-05
or an equivalent fork oil
Front fork oil capacity
720 ml
(each leg)
(24.3/25.4 US/Imp oz)
Front fork damping force adjuster
Rebound
15th clicks turn back
Compression
12th clicks turn back
LIMIT
———
500
(19.7)
———
———
———
———
———
10-12
DR-Z400/EK1 (’01-MODEL)
ITEM
Rear shock absorber gas
pressure
Rear shock absorber oil type
Rear shock absorber oil capacity
Rear shock absorber spring
pre-set length
Rear shock absorber damping
force adjuster
Rear wheel travel
STANDARD/SPECIFICATION
900 kPa
(9.0 kgf/cm2, 128 psi)
SUZUKI REAR SUSPENSION OIL SS-25
or an equivalent suspension oil
380 ml
(12.8/13.4 US/Imp oz)
258.0
(10.2)
Rebound
13th clicks turn back
Compression
12th clicks turn back
295
(11.6)
Swingarm pivot shaft runout
LIMIT
———
———
———
———
———
———
———
———
0.3
(0.01)
SPECIFICATION
NOTE
ELECTRICAL
ITEM
Spark plug
DENSO: U24ESR-N
NGK: CR8E
0.7 – 0.8 mm
(0.028 – 0.031 mm)
Over 8 mm (0.3 in) at 1 atm.
Type
Gap
Spark performance
Ignition coil resistance
Ignition coil primary peak voltage
Generator coil resistance
Pick-up coil peak voltage
Signal coil peak voltage
Generator no-load voltage
(when engine is cold)
Regulated voltage
Generator Max. output
Starter relay resistance
Battery
Type designation
Capacity
Fuse size
Primary
0.1 – 1.0 Ω
Secondary
12 – 20 kΩ
More than 150 V (
: B/W,
Terminal –
Ground
Plug cap –
Terminal
: B/Y)
Charging
0.50 – 1.25 Ω
Signal coil
0.05 – 0.20 Ω
Pick-up coil
390 – 600 Ω
More than 10.0 V (
: Bl,
: G)
Y –Y
B–W
G – Bl
DR-Z400
More than 5.0 V (
: Bl,
: G)
DR-Z400E
More than 1.0 V (
: B,
: W)
DR-Z400
More than 1.4 V (
: B,
: W)
DR-Z400E
More than 55 V (AC) at 5 000 r/min.
(Y – Y)
More than 75 V (AC) at 5 000 r/min.
(Y – Y)
12.5 – 14.0 V at 5 000 r/min.
13.5 – 15.0 V at 5 000 r/min.
150 W at 5 000 r/min.
200 W at 5 000 r/min.
3–5Ω
* YT7B-BS
* 12 V 21.6 kC (6 Ah)/10 HR
10 A
DR-Z400
DR-Z400E
DR-Z400
DR-Z400E
DR-Z400
DR-Z400E
DR-Z400E
DR-Z400E
DR-Z400E
DR-Z400/EK1 (’01-MODEL)
WATTAGE
10-13
Unit: W
ITEM
SPECIFICATION
55
LED
Headlight
Taillight
FUEL + OIL
ITEM
SPECIFICATION
Use only unleaded gasoline of at least 90 pump
octane ( R 2+ M ).
Gasoline containing MTBE (MethyI Tertiary ButyI
Ether), less than 10% ethanol, or less than 5%
methanol with appropriate cosolvents and corrosion inhibitor is permissible.
Fuel type
Gasoline used should be graded 95 octane or
higher. An unleaded gasoline is recommended.
Fuel tank including reserve
reserve
Engine oil type
Engine oil capacity
10.0 L
(2.6/2.2 US/lmp gal)
2.3 L
(0.6/0.5 US/lmp gal)
SAE 10W/40, API SF or SG
1 700 ml
Change
(1.8/1.5 US/lmp qt)
1 800 ml
Filter change
(1.9/1.6 US/lmp qt)
1 900 ml
Overhaul
(2.0/1.7 US/lmp qt)
NOTE
E-03, 28
E-01
10-14
DR-Z400/EK1 (’01-MODEL)
DR-Z400E (For E-24)
VALVE + GUIDE
Unit: mm (in)
ITEM
Valve diam.
STANDARD
IN.
EX.
Tappet clearance (when cold)
IN.
EX.
Valve guide to valve stem
clearance
IN.
EX.
Valve stem deflection
Valve guide I.D.
Valve stem O.D.
IN. & EX.
IN. & EX.
IN.
EX.
Valve stem runout
Valve head thickness
Valve seat width
Valve head radial runout
Valve spring free length
(IN. & EX.)
36
(1.42)
29
(1.14)
0.10 – 0.20
(0.0039 – 0.0078)
0.20 – 0.30
(0.0078 – 0.0118)
0.010 – 0.037
(0.0004 – 0.0015)
0.030 – 0.057
(0.0012 – 0.0022)
———
5.000 – 5.012
(0.1969 – 0.1973)
4.975 – 4.990
(0.1959 – 0.1965)
4.955 – 4.970
(0.1951 – 0.1957)
IN. & EX.
———
IN. & EX.
———
IN. & EX.
0.9 – 1.1
(0.035 – 0.043)
IN. & EX.
———
INNER
———
OUTER
———
Valve spring tension (IN. & EX.)
INNER
OUTER
56 – 64 N
(5.6 – 6.4 kgf, 12.3 – 14.1 lbs)
at length 27.4 mm (1.08 in)
126 – 145 N
(12.6 – 14.5 kgf, 27.7 – 32.0 lbs)
at length 30.9 mm (1.22 in)
LIMIT
———
———
———
———
———
———
0.35
(0.014)
———
———
———
0.05
(0.002)
0.5
(0.02)
———
0.03
(0.001)
32.6
(1.28)
36.3
(1.43)
———
———
DR-Z400/EK1 (’01-MODEL)
CAMSHAFT + CYLINDER HEAD
Unit: mm (in)
ITEM
Cam height
IN.
EX.
Camshaft journal oil clearance
Camshaft journal holder I.D.
Camshaft journal O.D.
IN. & EX.
IN. & EX.
IN. & EX.
STANDARD
36.910 – 36.960
(1.4531 – 1.4551)
36.880 – 36.930
(1.4520 – 1.4539)
0.019 – 0.053
(0.0007 – 0.0021)
22.012 – 22.025
(0.8666 – 0.8671)
21.972 – 21.993
(0.8653 – 0.8659)
Camshaft runout
15th pin
———
Cylinder head cover distortion
———
CYLINDER + PISTON + PISTON RING
ITEM
Piston to cylinder clearance
Cylinder bore
Piston diam.
Piston ring free end gap
(
Piston ring end gap
2nd
R
1st
2nd
Piston ring to groove clearance
)
———
R
———
LIMIT
1 000 kPa
10.0 kgf/cm2
142 psi
0.030 – 0.040
(0.0012 – 0.0016)
90.000 – 90.015
(3.5433 – 3.5439)
89.965 – 89.980
(3.5419 – 3.5425)
Measure at 15 mm (0.6 in) from the skirt end.
1st
———
Unit: mm (in)
STANDARD
Cylinder distortion
LIMIT
36.610
(1.4413)
36.580
(1.4402)
0.150
(0.0059)
0.10
(0.004)
———
0.05
(0.002)
0.05
(0.002)
———
Cam chain pin (at arrow “3”)
Cylinder head distortion
Compression pressure
(Automatic de-comp. actuated)
10-15
6.9
(0.27)
11.5
Approx.
(0.45)
0.08 – 0.20
(0.003 – 0.008)
0.08 – 0.20
(0.003 – 0.008)
Approx.
1st
———
2nd
———
———
0.120
(0.0047)
Nicks or
Scratches
89.880
(3.5386)
0.05
(0.002)
5.5
(0.22)
9.2
(0.36)
0.50
(0.020)
0.50
(0.020)
0.180
(0.007)
0.150
(0.006)
10-16
DR-Z400/EK1 (’01-MODEL)
ITEM
STANDARD
Piston ring groove width
1st
2nd
Oil
Piston ring thickness
1st
2nd
Piston pin bore
Piston pin O.D.
0.78 – 0.80
(0.0307 – 0.0315)
1.30 – 1.32
(0.0512 – 0.0520)
0.81 – 0.83
(0.0319 – 0.0327)
2.01 – 2.03
(0.0791 – 0.0799)
0.71 – 0.76
(0.0280 – 0.0299)
1.08 – 1.10
(0.0425 – 0.0433)
0.77 – 0.79
(0.0303 – 0.0311)
20.002 – 20.008
(0.7875 – 0.7877)
19.995 – 20.000
(0.7872 – 0.7874)
CONROD + CRANKSHAFT
ITEM
Conrod small end I.D.
Conrod deflection
Conrod big end side clearance
Conrod big end width
Crank web to web width
Crankshaft runout
LIMIT
———
———
———
———
———
———
———
20.030
(0.7886)
19.980
(0.7866)
Unit: mm (in)
STANDARD
20.010 – 20.018
(0.7878 – 0.7881)
———
0.30 – 0.65
(0.012 – 0.026)
21.95 – 22.00
(0.864 – 0.866)
62.0 ± 0.1
(2.441 ± 0.004)
———
LIMIT
20.040
(0.7890)
3.0
(0.12)
1.0
(0.04)
———
———
0.08
(0.003)
OIL PUMP
ITEM
Oil pump reduction ratio
Oil pressure (at 60°C, 140°F)
STANDARD
LIMIT
2.220 (74/25 × 20/16 × 12/20)
Above 40 kPa (0.4 kgf/cm2, 5.7 psi)
Below 140 kPa (1.4 kgf/cm2, 19.9 psi)
at 3 000 r/min.
———
———
DR-Z400/EK1 (’01-MODEL)
CLUTCH
Unit: mm (in)
ITEM
Clutch cable play
STANDARD
10 – 15
(0.4 – 0.6)
2.92 – 3.08
(0.115 – 0.121)
13.7 – 13.8
(0.539 – 0.543)
Drive plate thickness
(No. 1 & No. 2)
Drive plate claw width
(No. 1 & No. 2)
Driven plate distortion
———
Clutch spring free length
———
TRANSMISSION + DRIVE CHAIN
ITEM
Primary reduction ratio
Final reduction ratio
Gear ratios
Low
2nd
3rd
4th
Top
Shift fork to groove clearance
Shift fork groove width
No.1, No.2
& No.3
No.1, No.2
& No.3
Type
Links
Shift fork thickness
Drive chain
Drive chain slack
STANDARD
2.960 (74/25)
3.357 (47/14)
2.285 (32/14)
1.733 (26/15)
1.375 (22/16)
1.090 (24/22)
0.863 (19/22)
0.1 – 0.3
(0.004 – 0.012)
4.8 – 4.9
(0.189 – 0.193)
4.6 – 4.7
(0.181 – 0.185)
RK520KZO
112
———
40 – 50
(1.6 – 2.0)
CARBURETOR
ITEM
Carburetor type
Bore size
I.D. No
Idle r/min.
Float height
(M.J.)
(J.N.)
(N.J.)
LIMIT
———
2.62
(0.103)
13.2
(0.520)
0.10
(0.004)
49.9
(1.96)
Unit: mm (in) Except ratio
20-pitch length
Main jet
Jet needle
Needle jet
10-17
SPECIFICATION
KEIHIN FCR39H
39 mm
(1.5 in)
29F6
1 800 ± 100 r/min
9.0 ± 1.0 mm
(0.35 ± 0.04 in)
#165
OBDXP-4th
2.9 mm
(0.11 in)
LIMIT
———
———
———
———
———
———
———
0.5
(0.020)
———
———
———
———
319.4
(12.57)
———
10-18
DR-Z400/EK1 (’01-MODEL)
ITEM
Slow jet
Slow air jet
Air jet
Pilot screw
Throttle cable play
(pulling cable)
SPECIFICATION
(S.J.)
(S.A.J.)
(A.J.)
(P.S.)
#45
#60
#90
2¾ turns back
2 – 4 mm
(0.08 – 0.16 in)
RADIATOR + ENGINE COOLANT
ITEM
Radiator cap valve opening
pressure
Engine coolant type
Engine coolant capacity
STANDARD/SPECIFICATION
95 – 125 kPa
(0.95 – 1.25 kgf/cm2, 13.5 – 17.8 psi)
Use an anti-freeze/coolant compatible with aluminum radiator, mixed with distilled water only, at the
ratio of 50 : 50.
1 250 ml
(1.3/1.1 US/Imp qt)
BRAKE + WHEEL
ITEM
Brake lever play
Rear brake pedal height
Brake disc thickness
Unit: mm (in)
STANDARD/SPECIFICATION
0.1 – 0.3
(0.004 – 0.010)
5
(0.2)
3.5 ± 0.2
Front
(0.138 ± 0.008)
4.5 ± 0.2
Rear
(0.177 ± 0.008)
Brake disc runout
Master cylinder bore
———
Front
Rear
Master cylinder piston diam.
Front
Rear
Brake caliper cylinder bore
Front
Rear
Brake caliper piston diam.
Front
Rear
Brake fluid type
NOTE
12.700
(0.5000
12.700
(0.5000
12.657
(0.4983
12.657
(0.4983
27.000
(1.0630
27.000
(1.0630
26.900
(1.0591
26.900
(1.0591
DOT 4
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
12.743
0.5017)
12.743
0.5017)
12.684
0.4994)
12.684
0.4994)
27.050
1.0650)
27.050
1.0650)
26.950
1.0610)
26.950
1.0610)
LIMIT
———
———
3.0
(0.118)
4.0
(0.16)
0.30
(0.012)
———
———
———
———
———
———
———
———
———
DR-Z400/EK1 (’01-MODEL)
ITEM
Wheel rim runout
Wheel axle runout
Wheel rim size
STANDARD
Axial
———
Radial
———
Front
———
Rear
———
Front
Rear
1.60 × 21
2.15 × 18
10-19
LIMIT
2.0
(0.08)
2.0
(0.08)
0.25
(0.010)
0.25
(0.010)
———
———
TIRE
ITEM
Cold inflation tire pressure
(Solo riding)
Tire size
Tire tread depth
STANDARD/SPECIFICATION
2
Front
Rear
Front
Rear
125 kPa (1.25 kgf/cm , 18 psi)
125 kPa (1.25 kgf/cm2, 18 psi)
80/100-21 51P
120/90-18 65P
Front
———
Rear
———
SUSPENSION
ITEM
Front fork stroke
LIMIT
———
———
———
———
4.0 mm
(0.16 in)
4.0 mm
(0.16 in)
Unit: mm (in)
STANDARD/SPECIFICATION
288
(11.3)
Front fork spring free length
510.6
(20.1)
Front fork oil level
122
(without spring)
(4.8)
Front fork oil type
SUZUKI FORK OIL SS-05
or an equivalent fork oil
Front fork oil capacity
720 ml
(each leg)
(24.3/25.4 US/Imp oz)
Front fork damping force adjuster
Rebound
15th clicks turn back
Compression
12th clicks turn back
Rear shock absorber gas
900 kPa
pressure
(9.0 kgf/cm2, 128 psi)
Rear shock absorber oil type
SUZUKI REAR SUSPENSION OIL SS-25
or an equivalent suspension oil
Rear shock absorber oil capacity
380 ml
(12.8/13.4 US/Imp oz)
Rear shock absorber spring
258.0
pre-set length
(10.2)
Rear shock absorber damping
Rebound
13th clicks turn back
force adjuster
Compression
12th clicks turn back
LIMIT
———
500
(19.7)
———
———
———
———
———
———
———
———
———
———
———
10-20
DR-Z400/EK1 (’01-MODEL)
ITEM
Rear wheel travel
STANDARD/SPECIFICATION
295
(11.6)
Swingarm pivot shaft runout
LIMIT
———
0.3
(0.01)
———
ELECTRICAL
ITEM
Spark plug
Type
Gap
Spark performance
Ignition coil resistance
SPECIFICATION
DENSO: U24ESR-N
NGK: CR8E
0.7 – 0.8 mm
(0.028 – 0.031 mm)
Over 8 mm (0.3 in) at 1 atm.
Primary
0.1 – 1.0 Ω
Secondary
12 – 20 kΩ
Ignition coil primary peak voltage
More than 150 V
NOTE
Terminal –
Ground
Plug cap –
Terminal
: B/W,
: B/Y
Pick-up coil peak voltage
0.50 – 1.25 Ω
0.05 – 0.20 Ω
390 – 600 Ω
More than 5.0 V
Y –Y
B–W
G – Bl
: Bl,
:G
Signal coil peak voltage
More than 1.4 V
: B,
Generator coil resistance
Charging
Signal coil
Pick-up coil
Generator no-load voltage
(when engine is cold)
Regulated voltage
Generator Max. output
Starter relay resistance
Battery
Type designation
Capacity
Fuse size
More than 75 V (AC) at 5 000 r/min.
:W
Y –Y
13.5 – 15.0 V at 5 000 r/min.
200 W at 5 000 r/min.
3–5Ω
* YT7B-BS
* 12 V 21.6 kC (6 Ah)/10 HR
20 A
WATTAGE
Unit: W
ITEM
Headlight
Brake light/Taillight
Turn signal light
Speedometer light
Neutral indicator light
High beam indicator light
Turn signal indicator light
SPECIFICATION
HI
LO
60
55
21/5
21
LED
2
2
2
DR-Z400/EK1 (’01-MODEL)
FUEL + OIL
ITEM
SPECIFICATION
Gasoline used should be graded 95 octane or
higher. An unleaded gasoline is recommended.
Fuel type
Fuel tank including reserve
reserve
Engine oil type
Engine oil capacity
10.0 L
(2.6/2.2 US/lmp gal)
2.3 L
(0.6/0.5 US/lmp gal)
SAE 10W/40, API SF or SG
1 700 ml
Change
(1.8/1.5 US/lmp qt)
1 800 ml
Filter change
(1.9/1.6 US/lmp qt)
1 900 ml
Overhaul
(2.0/1.7 US/lmp qt)
NOTE
10-21
10-22
DR-Z400/EK1 (’01-MODEL)
BATTERY (DR-Z400E)
SPECIFICATIONS
Type designation
Capacity
YT7B-BS
12V, 21.6 kC (6 Ah)/10HR
INITIAL CHARGING
Filling electrolyte
• Remove the aluminum tape 1 sealing the battery electrolyte
filler holes.
• Remove the caps 2.
NOTE:
* After filling the electrolyte completely, use the removed cap 2
as the sealed caps of battery-filler holes.
* Do not remove or pierce the sealed areas 3 of the electrolyte
container.
• Insert the nozzles of the electrolyte container into the battery’s
electrolyte filler holes, holding the container firmly so that it does
not fall. Take precaution not to allow any of the fluid to spill.
• Make sure air bubbles are coming up each electrolyte container,
and leave in this position for about more than 20 minutes.
DR-Z400/EK1 (’01-MODEL)
NOTE:
If no air bubbles are coming up from a filler port, tap the bottom of
the electrolyte container two or three times.
Never remove the container from the battery.
• After confirming that the electrolyte has entered the battery
completely, remove the electrolyte containers from the battery.
Wait for around 20 minutes.
• Insert the caps into the filler holes, pressing in firmly so that the
top of the caps do not protrude above the upper surface of the
battery’s top cover.
* Never use anything except the specified battery.
* Once install the caps to the battery; do not remove the
caps.
* Do not tap the caps with a hammer when installing
them.
CORRECT
• Using multi circuit tester, measure the battery voltage. The tester
should indicate more than 12.5 – 12.6 V (DC) as shown in the
Fig. If the battery voltage is lower than the specification, charge
the battery with a battery charger. (Refer to the recharging operation)
Do not remove the caps on the battery top while charging.
NOTE:
Initial charging for a new battery is recommended if two years
have elapsed since the date of manufacture.
SERVICING
Visually inspect the surface of the battery container. If any signs
of cracking or electrolyte leakage from the sides of the battery
have occurred, replace the battery with a new one. If the battery
terminals are found to be coated with rust or an acidic white powdery substance, then this can be cleaned away with sandpaper.
INCORRECT
10-23
10-24
DR-Z400/EK1 (’01-MODEL)
RECHARGING OPERATION
• Using the multi circuit tester, check the battery voltage. If the
voltage reading is less than the 12.0 V (DC), recharge the battery with a battery charger.
* When recharging the battery, remove the battery from
the motorcycle.
* Do not remove the caps on the battery top while recharging.
Recharging time: 0.7 A for 5 to 10 hours or 3 A for one hour
Be careful not to permit the charging current to exceed
3 A at any time.
• After recharging, wait for more than 30 minutes and check the
battery voltage with a multi circuit tester.
• If the battery voltage is less than the 12.5 V, recharge the battery again.
• If battery voltage is still less than 12.5 V, after recharging, replace the battery with a new one.
• When the motorcycle is not used for a long period, check the
battery every 1 month to prevent the battery discharge.
DR-Z400/EK2 (’02-MODEL)
11-1
DR-Z400/EK2 (’02-MODEL)
This chapter describes specifications, service data and servicing procedures which differ from
those of DR-Z400/EK1 (’01-MODEL).
NOTE:
* Any difference between DR-Z400/EK1 (’01-MODEL) and DR-Z400/EK2 (’02-MODEL) in specifications and service data are cleary indicated with the asterisk mark (*).
* Please refer to the chapter 1 through 10 for details which are not given in this chapter.
CONTENTS
SPECIFICATIONS ............................................................................... 11- 2
DR-Z400/E (E-01, 03 and 28) ........................................................... 11- 2
DR-Z400E (E-24) .............................................................................. 11- 4
PERIODIC MAINTENANCE SCHEDULE (For E-24) ......................... 11- 6
SERVICE DATA ................................................................................... 11- 7
DR-Z400/E (E-01, 03 and 28) ........................................................... 11- 7
DR-Z400E (E-24) .............................................................................. 11-15
REAR SHOCK ABSORBER ............................................................... 11-23
OIL REPLACEMENT PROCEDURE ............................................... 11-23
REASSEMBLY AND REMOUNTING .............................................. 11-25
DAMPING FORCE ADJUSTMENT ................................................. 11-26
WIRING DIAGRAM .............................................................................. 11-27
COOLING SYSTEM HOSE ROUTING ................................................ 11-29
11
11-2
DR-Z400/EK2 (’02-MODEL)
SPECIFICATIONS
DR-Z400/E (For E-01, 03 and 28)
DIMENSIONS AND DRY MASS
Overall length .........................................................
Overall width ..........................................................
Overall height .........................................................
Wheelbase .............................................................
Ground clearance ..................................................
Seat height .............................................................
Dry mass ................................................................
2 235 mm (88.0 in)
825 mm (32.5 in)
1 235 mm (48.6 in)
1 475 mm (58.1 in)
325 mm (12.8 in)
945 mm (37.2 in)
113 kg (249 lbs) ..... DR-Z400
119 kg (262 lbs) ..... DR-Z400E
ENGINE
Type........................................................................
Number of cylinders ...............................................
Bore .......................................................................
Stroke .....................................................................
Piston displacement ..............................................
Compression ratio ..................................................
Carburetor ..............................................................
Air cleaner ..............................................................
Starter system........................................................
Lubrication system .................................................
Four-stroke, liquid-cooled, DOHC
1
90.0 mm (3.543 in)
62.6 mm (2.465 in)
398 cm3 (24.3 cu. in)
12.2 : 1
KEIHIN FCR39
Polyurethane foam element
Primary kick ..... DR-Z400
Electric ..... DR-Z400E
Dry sump
TRANSMISSION
Clutch .....................................................................
Transmission ..........................................................
Gearshift pattern ....................................................
Primary reduction ratio ..........................................
Final reduction ratio ...............................................
Gear ratios, Low ....................................................
2nd ....................................................
3nd ....................................................
4nd ....................................................
Top .....................................................
Drive chain .............................................................
Wet multi-plate type
5-speed constant mesh
1-down, 4-up
2.960 (74/25)
3.357 (47/14)
2.285 (32/14)
1.733 (26/15)
1.375 (22/16)
1.090 (24/22)
0.863 (19/22)
RK520KZO, 112 links
DR-Z400/EK2 (’02-MODEL)
CHASSIS
Front suspension ...................................................
Rear suspension ....................................................
Front suspension stroke ........................................
Rear wheel travel ...................................................
Caster ....................................................................
Trail .........................................................................
Steering angle .......................................................
Turning radius ........................................................
Front brake .............................................................
Rear brake .............................................................
Front tire size .........................................................
Rear tire size ..........................................................
Telescopic, coil spring, oil damped
Link type, coil spring, oil damped
288 mm (11.3 in)
295 mm (11.6 in)
27° 20’
112 mm (4.41 in)
45° (right & left)
2.2 m (7.2 ft)
Disc brake
Disc brake
80/100-21 51M
110/100-18 64M
ELECTRICAL
Ignition type ...........................................................
Ignition timing .........................................................
Spark plug ..............................................................
Electronic ignition (CDI)
7° BTDC at 1 800 r/min
NGK: CR8E
DENSO: U24ESR-N
Battery ................................................................... 12 V 21.6 kC (6 Ah)/10HR ..... DR-Z400E
Generator ............................................................... Three-phase A.C. generator
Fuse ....................................................................... 10 A ..... DR-Z400E
Headlight ................................................................ * 12 V 35 W
Taillight ................................................................... LED
CAPACITIES
Fuel tank, including reserve ...................................
reserve ..................................................
Engine oil, oil change ............................................
oil and filter change .............................
engine overhaul ...................................
Front fork oil ...........................................................
Engine coolant .......................................................
10.0 L (2.6 US gal, 2.2 Imp gal)
2.3 L (0.6 US gal, 0.5 Imp gal)
1 700 ml (1.8 US qt, 1.5 Imp qt)
1 800 ml (1.9 US qt, 1.6 Imp qt)
1 900 ml (2.0 US qt, 1.7 Imp qt)
720 ml (24.3 US oz, 25.4 Imp oz)
1 250 ml (1.3 US qt, 1.1 Imp qt)
NOTE:
These specifications are subject to change without notice.
11-3
11-4
DR-Z400/EK2 (’02-MODEL)
DR-Z400E (For E-24)
DIMENSIONS AND DRY MASS
Overall length .........................................................
Overall width ..........................................................
Overall height .........................................................
Wheelbase .............................................................
Ground clearance ..................................................
Seat height .............................................................
Dry mass ................................................................
2 310 mm (90.9 in)
825 mm (32.5 in)
1 235 mm (48.6 in)
1 475 mm (58.1 in)
315 mm (12.4 in)
935 mm (36.8 in)
127 kg (279 lbs)
ENGINE
Type........................................................................
Number of cylinders ...............................................
Bore .......................................................................
Stroke .....................................................................
Piston displacement ..............................................
Compression ratio ..................................................
Carburetor ..............................................................
Air cleaner ..............................................................
Starter system........................................................
Lubrication system .................................................
Four-stroke, liquid-cooled, DOHC
1
90.0 mm (3.543 in)
62.6 mm (2.465 in)
398 cm3 (24.3 cu. in)
12.2 : 1
KEIHIN FCR39
Polyurethane foam element
Electric
Dry sump
TRANSMISSION
Clutch .....................................................................
Transmission ..........................................................
Gearshift pattern ....................................................
Primary reduction ratio ..........................................
Final reduction ratio ...............................................
Gear ratios, Low .....................................................
2nd .....................................................
3rd ......................................................
4th .......................................................
Top ......................................................
Drive chain .............................................................
Wet multi-plate type
5-speed constant mesh
1-down, 4-up
2.960 (74/25)
3.357 (47/14)
2.285 (32/14)
1.733 (26/15)
1.375 (22/16)
1.090 (24/22)
0.863 (19/22)
RK520KZO, 112 links
DR-Z400/EK2 (’02-MODEL)
CHASSIS
Front suspension ...................................................
Rear suspension ....................................................
Front fork stroke .....................................................
Rear wheel travel ...................................................
Caster ....................................................................
Trail .........................................................................
Steering angle .......................................................
Turning radius ........................................................
Front brake .............................................................
Rear brake .............................................................
Front tire size .........................................................
Rear tire size ..........................................................
Telescopic, coil spring, oil damped
Link type, coil spring, oil damped
288 mm (11.3 in)
295 mm (11.6 in)
27° 20’
112 mm (4.41 in)
45° (right & left)
2.2 m (7.2 ft)
Disc brake
Disc brake
80/100-21 51P or 80/100-21 M/C 51P
120/90-18 65P or 120/90-18 M/C 65P
ELECTRICAL
Ignition type ...........................................................
Ignition timing .........................................................
Spark plug ..............................................................
Generator ...............................................................
Battery ...................................................................
Fuse .......................................................................
Headlight ................................................................
Brake light/Taillight .................................................
Turn signal light ......................................................
Speedometer light ..................................................
Neutral indicator light .............................................
High beam indicator light .......................................
Turn signal indicator light .......................................
Electronic ignition (CDI)
7° BTDC at 1 800 r/min
NGK: CR8E
DENSO: U24ESR-N
Three-phase A.C. generator
12 V 21.6 kC (6 Ah)/10 HR
20 A
12 V 60/55 W
12 V 21/5 W
12 V 21 W
LED
12 V 2 W
12 V 2 W
12 V 2 W
CAPACITIES
Fuel tank, including reserve ..................................
reserve ..................................................
Engine oil, oil change ............................................
oil and filter change .............................
engine overhaul ...................................
Front fork oil ...........................................................
Engine coolant .......................................................
10.0 L (2.6 US gal, 2.2 Imp gal)
2.3 L (0.6 US gal, 0.5 Imp gal)
1 700 ml (1.8 US qt, 1.5 Imp qt)
1 800 ml (1.9 US qt, 1.6 Imp qt)
1 900 ml (2.0 US qt, 1.7 Imp qt)
720 ml (24.3 US oz, 25.4 Imp oz)
1 250 ml (1.3 US qt, 1.1 Imp qt)
NOTE:
These specifications are subject to change without notice.
11-5
11-6
DR-Z400/EK2 (’02-MODEL)
PERIODIC MAINTENANCE SCHEDULE (FOR E-24)
The chart below lists the recommended intervals for all the required periodic service work necessary to
keep the motorcycle operating at peak performance and economy. Maintenance intervals are expressed in
terms of kilometers, miles and months, and are dependent on whichever comes first.
NOTE:
More frequent servicing may be performed on motorcycles that are used under severe conditions.
PERIODIC MAINTENANCE CHART
Interval
Item
Air cleaner element
km
miles
months
Exhaust pipe bolts and muffler bolts
Valve clearance
Spark plugs
Fuel hose
Engine oil
Engine oil filter
Idle speed
Throttle cable play
Engine coolant
Radiator hose
Clutch
Drive chain
Brakes
Brake hose
Brake fluid
Tires
Spoke nipples
Steering
Front forks
Rear suspension
Chassis bolts and nuts
I
R
T
C
1 000
6 000
12 000
18 000
24 000
600
4 000
7 500
11 000
15 000
1
6
12
18
24
–
I
I
R
I
Inspect each time the motorcycles is ridden in
off-road and clean as necessary
T
–
T
–
T
–
–
–
–
I
–
I
R
I
R
–
I
I
I
I
Replace every 4 years.
R
R
R
R
R
R
–
–
R
–
I
I
I
I
I
I
I
I
I
I
Replace every 2 years.
–
I
I
I
I
–
I
I
I
I
I
I
I
I
I
Clean, lubricate and inspect each time
the motorcycle is ridden in off-road
I
I
I
I
I
–
I
I
I
I
Replace every 4 years.
–
I
I
I
I
Replace every 2 years.
–
I
I
I
I
Inspect each time the motorcycle is ridden in off-road
I
I
I
I
I
Inspect each time the motorcycle is ridden in off-road
I
–
I
–
I
–
–
I
–
I
–
–
I
–
I
T
T
T
T
T
= Inspect and adjust, clean, lubricate, or replace as necessary.
= Replace
= Tighten
= Clean
NOTE:
If the motorcycle is often ridden in the off-road, perform the above maintenance at the half interval.
DR-Z400/EK2 (’02-MODEL)
11-7
SERVICE DATA
DR-Z400/E (For E-01, 03 and 28)
VALVE + GUIDE
Unit: mm (in)
ITEM
Valve diam.
IN.
EX.
Tappet clearance (when cold)
IN.
EX.
Valve guide to valve stem
clearance
IN.
EX.
Valve stem deflection
Valve guide I.D.
Valve stem O.D.
IN. & EX.
IN. & EX.
IN.
EX.
Valve stem runout
Valve head thickness
Valve seat width
Valve head radial runout
Valve spring free length
(IN. & EX.)
STANDARD
36
(1.42)
29
(1.14)
0.10 – 0.20
(0.0039 – 0.0078)
0.20 – 0.30
(0.0078 – 0.0118)
0.010 – 0.037
(0.0004 – 0.0015)
0.030 – 0.057
(0.0012 – 0.0022)
———
5.000 – 5.012
(0.1969 – 0.1973)
4.975 – 4.990
(0.1959 – 0.1965)
4.955 – 4.970
(0.1951 – 0.1957)
IN. & EX.
———
IN. & EX.
———
IN. & EX.
0.9 – 1.1
(0.035 – 0.043)
IN. & EX.
———
INNER
———
OUTER
———
Valve spring tension (IN. & EX.)
INNER
OUTER
56 – 64 N
(5.6 – 6.4 kgf, 12.3 – 14.1 lbs)
at length 27.4 mm (1.08 in)
126 – 145 N
(12.6 – 14.5 kgf, 27.7 – 32.0 lbs)
at length 30.9 mm (1.22 in)
LIMIT
———
———
———
———
———
———
0.35
(0.014)
———
———
———
0.05
(0.002)
0.5
(0.02)
———
0.03
(0.001)
32.6
(1.28)
36.3
(1.43)
———
———
11-8
DR-Z400/EK2 (’02-MODEL)
CAMSHAFT + CYLINDER HEAD
Unit: mm (in)
ITEM
Cam height
STANDARD
36.910 – 36.960
(1.4531 – 1.4551)
36.880 – 36.930
(1.4520 – 1.4539)
0.019 – 0.053
(0.0007 – 0.0021)
22.012 – 22.025
(0.8666 – 0.8671)
21.972 – 21.993
(0.8653 – 0.8659)
IN.
EX.
Camshaft journal oil clearance
Camshaft journal holder I.D.
Camshaft journal O.D.
LIMIT
IN. & EX.
IN. & EX.
IN. & EX.
Camshaft runout
15th pin
———
Cylinder head cover distortion
———
De-compression cable play
(DR-Z400)
0 – 0.1
(0 – 0.004)
Compression pressure
(Automatic de-comp. actuated)
Except for DR-Z400
Piston to cylinder clearance
Cylinder bore
Piston diam.
Piston ring free end gap
Piston ring end gap
LIMIT
1 000 kPa
10.0 kgf/cm2
142 psi
0.030 – 0.040
(0.0012 – 0.0016)
90.000 – 90.015
(3.5433 – 3.5439)
89.965 – 89.980
(3.5419 – 3.5425)
Measure at 15 mm (0.6 in) from the skirt end.
(
)
———
1st
R
2nd
R
1st
2nd
Piston ring to groove clearance
Unit: mm (in)
STANDARD
Cylinder distortion
———
———
CYLINDER + PISTON + PISTON RING
ITEM
———
0.10
(0.004)
———
0.05
(0.002)
0.05
(0.002)
———
Cam chain pin (at arrow “3”)
Cylinder head distortion
36.610
(1.4413)
36.580
(1.4402)
0.150
(0.0059)
6.9
(0.27)
11.5
Approx.
(0.45)
0.08 – 0.20
(0.003 – 0.008)
0.08 – 0.20
(0.003 – 0.008)
Approx.
1st
———
2nd
———
———
0.120
(0.0047)
Nicks or
Scratches
89.880
(3.5386)
0.05
(0.002)
5.5
(0.22)
9.2
(0.36)
0.50
(0.020)
0.50
(0.020)
0.180
(0.007)
0.150
(0.006)
DR-Z400/EK2 (’02-MODEL)
ITEM
Piston ring groove width
1st
2nd
Oil
Piston ring thickness
1st
2nd
Piston pin bore
Piston pin O.D.
STANDARD
0.78 – 0.80
(0.0307 – 0.0315)
1.30 – 1.32
(0.0512 – 0.0520)
0.81 – 0.83
(0.0319 – 0.0327)
2.01 – 2.03
(0.0791 – 0.0799)
0.71 – 0.76
(0.0280 – 0.0299)
1.08 – 1.10
(0.0425 – 0.0433)
0.77 – 0.79
(0.0303 – 0.0311)
20.002 – 20.008
(0.7875 – 0.7877)
19.995 – 20.000
(0.7872 – 0.7874)
CONROD + CRANKSHAFT
ITEM
Conrod small end I.D.
Conrod deflection
Conrod big end side clearance
Conrod big end width
Crank web to web width
Crankshaft runout
LIMIT
———
———
———
———
———
———
———
20.030
(0.7886)
19.980
(0.7866)
Unit: mm (in)
STANDARD
LIMIT
20.010 – 20.018
(0.7878 – 0.7881)
20.040
(0.7890)
3.0
(0.12)
1.0
(0.04)
———
0.30 – 0.65
(0.012 – 0.026)
21.95 – 22.00
(0.864 – 0.866)
62.0 ± 0.1
(2.441 ± 0.004)
———
———
———
0.08
(0.003)
OIL PUMP
ITEM
Oil pump reduction ratio
Oil pressure (at 60°C, 140°F)
11-9
STANDARD
2.220 (74/25 × 20/16 × 12/20)
Above 40 kPa (0.4 kgf/cm2, 5.7 psi)
Below 140 kPa (1.4 kgf/cm2, 19.9 psi)
at 3 000 r/min.
LIMIT
———
———
11-10
DR-Z400/EK2 (’02-MODEL)
CLUTCH
Unit: mm (in)
ITEM
STANDARD
Clutch cable play
LIMIT
10 – 15
(0.4 – 0.6)
2.92 – 3.08
(0.115 – 0.121)
13.7 – 13.8
(0.539 – 0.543)
Drive plate thickness
(No. 1 & No. 2)
Drive plate claw width
(No. 1 & No. 2)
Driven plate distortion
———
2.62
(0.103)
13.2
(0.520)
0.10
(0.004)
49.9
(1.96)
———
Clutch spring free length
———
TRANSMISSION + DRIVE CHAIN
ITEM
STANDARD
Primary reduction ratio
Final reduction ratio
Gear ratios
Low
2nd
3rd
4th
Top
Shift fork to groove clearance
Shift fork groove width
Shift fork thickness
Drive chain
Unit: mm (in) Except ratio
No.1, No.2
& No.3
No.1, No.2
& No.3
Type
Links
2.960 (74/25)
3.357 (47/14)
2.285 (32/14)
1.733 (26/15)
1.375 (22/16)
1.090 (24/22)
0.863 (19/22)
0.1 – 0.3
(0.004 – 0.012)
4.8 – 4.9
(0.189 – 0.193)
4.6 – 4.7
(0.181 – 0.185)
RK520KZO
112
———
———
———
———
———
———
———
0.5
(0.020)
———
———
———
———
319.4
(12.57)
———
20-pitch length
Drive chain slack
LIMIT
40 – 50
(1.6 – 2.0)
———
CARBURETOR
SPECIFICATION
ITEM
Carburetor type
Bore size
I.D. No
Idle r/min.
Float height
DR-Z400
E-01
E-03, 28
KEIHIN
←
FCR39H
39 mm
←
(1.5 in)
29F0
29F1
1 800 ± 100 r/min
←
9.0 ± 1.0 mm
←
(0.35 ± 0.04 in)
DR-Z400E
E-01
E-03, 28
←
←
←
←
29F3
←
29F4
←
←
←
DR-Z400/EK2 (’02-MODEL)
11-11
SPECIFICATION
ITEM
Main jet
Jet needle
Needle jet
Slow jet
Slow air jet
Air jet
Pilot screw
Throttle cable play
(pulling cable)
(M.J.)
(J.N.)
(N.J.)
(S.J.)
(S.A.J.)
(A.J.)
(P.S.)
DR-Z400
E-01
E-03, 28
#165
#142
OBDXP-4th
←
2.9 mm
←
(0.11 in)
#45
←
#60
←
#90
←
1½ turns back
←
2 – 4 mm
←
(0.08 – 0.16 in)
DR-Z400E
E-01
E-03, 28
#165
#142
←
←
←
←
←
←
←
←
←
←
←
←
←
←
RADIATOR + ENGINE COOLANT
ITEM
Radiator cap valve opening
pressure
Engine coolant type
Engine coolant capacity
STANDARD/SPECIFICATION
95 – 125 kPa
(0.95 – 1.25 kgf/cm2, 13.5 – 17.8 psi)
Use an anti-freeze/coolant compatible with aluminum radiator, mixed with distilled water only, at the
ratio of 50 : 50.
1 250 ml
(1.3/1.1 US/Imp qt)
BRAKE + WHEEL
ITEM
Rear brake pedal height
Brake disc thickness
Unit: mm (in)
STANDARD/SPECIFICATION
5
(0.2)
3.0 ± 0.2
Front
(0.118 ± 0.008)
4.5 ± 0.2
Rear
(0.177 ± 0.008)
Brake disc runout
Master cylinder bore
———
Front
Rear
Master cylinder piston diam.
NOTE
Front
Rear
11.000
(0.4331
12.700
(0.5000
10.957
(0.4314
12.657
(0.4983
–
–
–
–
–
–
–
–
11.043
0.4348)
12.743
0.5017)
10.984
0.4324)
12.684
0.4994)
LIMIT
———
2.5
(0.098)
4.0
(0.16)
0.30
(0.012)
———
———
———
———
11-12
DR-Z400/EK2 (’02-MODEL)
ITEM
Brake caliper cylinder bore
STANDARD
Front
Rear
Brake caliper piston diam.
Front
Rear
Brake fluid type
Wheel rim runout
Wheel axle runout
Wheel rim size
27.000
(1.0630
27.000
(1.0630
26.900
(1.0591
26.900
(1.0591
DOT 4
–
–
–
–
–
–
–
–
LIMIT
27.050
1.0650)
27.050
1.0650)
26.950
1.0610)
26.950
1.0610)
Axial
———
Radial
———
Front
———
Rear
———
Front
Rear
1.60 × 21
2.15 × 18
———
———
———
———
———
2.0
(0.08)
2.0
(0.08)
0.25
(0.010)
0.25
(0.010)
———
———
TIRE
ITEM
Cold inflation tire pressure
(Solo riding)
Tire size
Tire tread depth
Front
Rear
Front
Rear
STANDARD/SPECIFICATION
100 kPa (1.0 kgf/cm2, 14 psi)
100 kPa (1.0 kgf/cm2, 14 psi)
80/100-21 51M
110/100-18 64M
Front
———
Rear
———
SUSPENSION
ITEM
Front fork stroke
LIMIT
———
———
———
———
4.0 mm
(0.16 in)
4.0 mm
(0.16 in)
Unit: mm (in)
STANDARD/SPECIFICATION
288
(11.3)
Front fork spring free length
510.6
(20.1)
Front fork oil level
122
(without spring)
(4.8)
Front fork oil type
SUZUKI FORK OIL SS-05
or an equivalent fork oil
Front fork oil capacity
720 ml
(each leg)
(24.3/25.4 US/Imp oz)
Front fork damping force adjuster
Rebound
15th clicks turn back
Compression
12th clicks turn back
LIMIT
———
500
(19.7)
———
———
———
———
———
DR-Z400/EK2 (’02-MODEL)
ITEM
Rear shock absorber gas
pressure
Rear shock absorber oil type
Rear shock absorber oil capacity
Rear shock absorber spring
pre-set length
Rear shock absorber damping
force adjuster
Rear wheel travel
STANDARD/SPECIFICATION
900 kPa
(9.0 kgf/cm2, 128 psi)
SUZUKI REAR SUSPENSION OIL SS-25
or an equivalent suspension oil
380 ml
(12.8/13.4 US/Imp oz)
258.0
(10.2)
Rebound
13th clicks turn back
*High speed
1¼ turns out
Compression
*Low speed 10th clicks turn back
295
(11.6)
Swingarm pivot shaft runout
LIMIT
———
———
———
———
———
———
———
———
———
0.3
(0.01)
SPECIFICATION
NOTE
ELECTRICAL
ITEM
Spark plug
DENSO: U24ESR-N
NGK: CR8E
0.7 – 0.8 mm
(0.028 – 0.031 mm)
Over 8 mm (0.3 in) at 1 atm.
Type
Gap
Spark performance
Ignition coil resistance
Ignition coil primary peak voltage
Generator coil resistance
Pick-up coil peak voltage
Signal coil peak voltage
Generator no-load voltage
(when engine is cold)
Regulated voltage
Generator Max. output
Starter relay resistance
Battery
Type designation
Capacity
Primary
0.1 – 1.0 Ω
Secondary
12 – 20 kΩ
More than 150 V (
: B/W,
Terminal –
Ground
Plug cap –
Terminal
: B/Y)
Charging
0.50 – 1.25 Ω
Signal coil
0.05 – 0.20 Ω
Pick-up coil
390 – 600 Ω
More than 10.0 V (
: Bl,
: G)
Y –Y
B–W
G – Bl
DR-Z400
More than 5.0 V (
: Bl,
: G)
DR-Z400E
More than 1.0 V (
: B,
: W)
DR-Z400
More than 1.4 V (
: B,
: W)
DR-Z400E
More than 55 V (AC) at 5 000 r/min.
(Y – Y)
More than 75 V (AC) at 5 000 r/min.
(Y – Y)
12.5 – 14.0 V at 5 000 r/min.
13.5 – 15.0 V at 5 000 r/min.
150 W at 5 000 r/min.
200 W at 5 000 r/min.
3–5Ω
YT7B-BS
12 V 21.6 kC (6 Ah)/10 HR
DR-Z400
DR-Z400E
DR-Z400
DR-Z400E
DR-Z400
DR-Z400E
DR-Z400E
DR-Z400E
11-13
11-14
DR-Z400/EK2 (’02-MODEL)
WATTAGE
Unit: W
ITEM
SPECIFICATION
Headlight
Taillight
*35
LED
FUEL + OIL
ITEM
SPECIFICATION
Use only unleaded gasoline of at least 90 pump
octane ( R 2+ M ).
Gasoline containing MTBE (MethyI Tertiary ButyI
Ether), less than 10% ethanol, or less than 5%
methanol with appropriate cosolvents and corrosion inhibitor is permissible.
Fuel type
Gasoline used should be graded 95 octane or
higher. An unleaded gasoline is recommended.
Fuel tank including reserve
reserve
Engine oil type
Engine oil capacity
10.0 L
(2.6/2.2 US/lmp gal)
2.3 L
(0.6/0.5 US/lmp gal)
SAE 10W/40, API SF or SG
1 700 ml
Change
(1.8/1.5 US/lmp qt)
1 800 ml
Filter change
(1.9/1.6 US/lmp qt)
1 900 ml
Overhaul
(2.0/1.7 US/lmp qt)
NOTE
E-03, 28
E-01
DR-Z400/EK2 (’02-MODEL)
11-15
DR-Z400E (For E-24)
VALVE + GUIDE
Unit: mm (in)
ITEM
Valve diam.
IN.
EX.
Tappet clearance (when cold)
IN.
EX.
Valve guide to valve stem
clearance
IN.
EX.
Valve stem deflection
Valve guide I.D.
Valve stem O.D.
IN. & EX.
IN. & EX.
IN.
EX.
Valve stem runout
Valve head thickness
Valve seat width
Valve head radial runout
Valve spring free length
(IN. & EX.)
STANDARD
36
(1.42)
29
(1.14)
0.10 – 0.20
(0.0039 – 0.0078)
0.20 – 0.30
(0.0078 – 0.0118)
0.010 – 0.037
(0.0004 – 0.0015)
0.030 – 0.057
(0.0012 – 0.0022)
———
5.000 – 5.012
(0.1969 – 0.1973)
4.975 – 4.990
(0.1959 – 0.1965)
4.955 – 4.970
(0.1951 – 0.1957)
IN. & EX.
———
IN. & EX.
———
IN. & EX.
0.9 – 1.1
(0.035 – 0.043)
IN. & EX.
———
INNER
———
OUTER
———
Valve spring tension (IN. & EX.)
INNER
OUTER
56 – 64 N
(5.6 – 6.4 kgf, 12.3 – 14.1 lbs)
at length 27.4 mm (1.08 in)
126 – 145 N
(12.6 – 14.5 kgf, 27.7 – 32.0 lbs)
at length 30.9 mm (1.22 in)
LIMIT
———
———
———
———
———
———
0.35
(0.014)
———
———
———
0.05
(0.002)
0.5
(0.02)
———
0.03
(0.001)
32.6
(1.28)
36.3
(1.43)
———
———
11-16
DR-Z400/EK2 (’02-MODEL)
CAMSHAFT + CYLINDER HEAD
Unit: mm (in)
ITEM
Cam height
STANDARD
36.910 – 36.960
(1.4531 – 1.4551)
36.880 – 36.930
(1.4520 – 1.4539)
0.019 – 0.053
(0.0007 – 0.0021)
22.012 – 22.025
(0.8666 – 0.8671)
21.972 – 21.993
(0.8653 – 0.8659)
IN.
EX.
Camshaft journal oil clearance
Camshaft journal holder I.D.
Camshaft journal O.D.
LIMIT
IN. & EX.
IN. & EX.
IN. & EX.
Camshaft runout
15th pin
———
Cylinder head cover distortion
———
CYLINDER + PISTON + PISTON RING
ITEM
Compression pressure
(Automatic de-comp. actuated)
Piston to cylinder clearance
Cylinder bore
Piston diam.
Piston ring free end gap
Piston ring end gap
(
)
———
R
2nd
R
1st
2nd
Piston ring to groove clearance
LIMIT
1 000 kPa
10.0 kgf/cm2
142 psi
0.030 – 0.040
(0.0012 – 0.0016)
90.000 – 90.015
(3.5433 – 3.5439)
89.965 – 89.980
(3.5419 – 3.5425)
Measure at 15 mm (0.6 in) from the skirt end.
1st
———
Unit: mm (in)
STANDARD
Cylinder distortion
———
0.10
(0.004)
———
0.05
(0.002)
0.05
(0.002)
———
Cam chain pin (at arrow “3”)
Cylinder head distortion
36.610
(1.4413)
36.580
(1.4402)
0.150
(0.0059)
6.9
(0.27)
11.5
Approx.
(0.45)
0.08 – 0.20
(0.003 – 0.008)
0.08 – 0.20
(0.003 – 0.008)
Approx.
1st
———
2nd
———
———
0.120
(0.0047)
Nicks or
Scratches
89.880
(3.5386)
0.05
(0.002)
5.5
(0.22)
9.2
(0.36)
0.50
(0.020)
0.50
(0.020)
0.180
(0.007)
0.150
(0.006)
DR-Z400/EK2 (’02-MODEL)
ITEM
STANDARD
Piston ring groove width
1st
2nd
Oil
Piston ring thickness
1st
2nd
Piston pin bore
Piston pin O.D.
0.78 – 0.80
(0.0307 – 0.0315)
1.30 – 1.32
(0.0512 – 0.0520)
0.81 – 0.83
(0.0319 – 0.0327)
2.01 – 2.03
(0.0791 – 0.0799)
0.71 – 0.76
(0.0280 – 0.0299)
1.08 – 1.10
(0.0425 – 0.0433)
0.77 – 0.79
(0.0303 – 0.0311)
20.002 – 20.008
(0.7875 – 0.7877)
19.995 – 20.000
(0.7872 – 0.7874)
CONROD + CRANKSHAFT
ITEM
Conrod small end I.D.
Conrod deflection
Conrod big end side clearance
Conrod big end width
Crank web to web width
Crankshaft runout
LIMIT
———
———
———
———
———
———
———
20.030
(0.7886)
19.980
(0.7866)
Unit: mm (in)
STANDARD
20.010 – 20.018
(0.7878 – 0.7881)
———
0.30 – 0.65
(0.012 – 0.026)
21.95 – 22.00
(0.864 – 0.866)
62.0 ± 0.1
(2.441 ± 0.004)
LIMIT
20.040
(0.7890)
3.0
(0.12)
1.0
(0.04)
———
———
———
0.08
(0.003)
STANDARD
LIMIT
2.220 (74/25 × 20/16 × 12/20)
Above 40 kPa (0.4 kgf/cm2, 5.7 psi)
Below 140 kPa (1.4 kgf/cm2, 19.9 psi)
at 3 000 r/min.
———
OIL PUMP
ITEM
Oil pump reduction ratio
Oil pressure (at 60°C, 140°F)
11-17
———
11-18
DR-Z400/EK2 (’02-MODEL)
CLUTCH
Unit: mm (in)
ITEM
STANDARD
Clutch cable play
10 – 15
(0.4 – 0.6)
2.92 – 3.08
(0.115 – 0.121)
13.7 – 13.8
(0.539 – 0.543)
Drive plate thickness
(No. 1 & No. 2)
Drive plate claw width
(No. 1 & No. 2)
Driven plate distortion
———
Clutch spring free length
———
TRANSMISSION + DRIVE CHAIN
ITEM
Low
2nd
3rd
4th
Top
Shift fork to groove clearance
Shift fork groove width
No.1, No.2
& No.3
No.1, No.2
& No.3
Type
Links
Shift fork thickness
Drive chain
2.960 (74/25)
3.357 (47/14)
2.285 (32/14)
1.733 (26/15)
1.375 (22/16)
1.090 (24/22)
0.863 (19/22)
0.1 – 0.3
(0.004 – 0.012)
4.8 – 4.9
(0.189 – 0.193)
4.6 – 4.7
(0.181 – 0.185)
RK520KZO
112
———
20-pitch length
Drive chain slack
40 – 50
(1.6 – 2.0)
CARBURETOR
ITEM
SPECIFICATION
Carburetor type
Bore size
I.D. No
Idle r/min.
Float height
Main jet
Jet needle
Needle jet
(M.J.)
(J.N.)
(N.J.)
———
2.62
(0.103)
13.2
(0.520)
0.10
(0.004)
49.9
(1.96)
Unit: mm (in) Except ratio
STANDARD
Primary reduction ratio
Final reduction ratio
Gear ratios
LIMIT
KEIHIN FCR39H
39 mm
(1.5 in)
29F6
1 800 ± 100 r/min
9.0 ± 1.0 mm
(0.35 ± 0.04 in)
#165
OBDXP-4th
2.9 mm
(0.11 in)
LIMIT
———
———
———
———
———
———
———
0.5
(0.020)
———
———
———
———
319.4
(12.57)
———
DR-Z400/EK2 (’02-MODEL)
ITEM
Slow jet
Slow air jet
Air jet
Pilot screw
Throttle cable play
(pulling cable)
11-19
SPECIFICATION
#45
#60
#90
2¾ turns back
2 – 4 mm
(0.08 – 0.16 in)
(S.J.)
(S.A.J.)
(A.J.)
(P.S.)
RADIATOR + ENGINE COOLANT
ITEM
Radiator cap valve opening
pressure
Engine coolant type
Engine coolant capacity
STANDARD/SPECIFICATION
95 – 125 kPa
(0.95 – 1.25 kgf/cm2, 13.5 – 17.8 psi)
Use an anti-freeze/coolant compatible with aluminum radiator, mixed with distilled water only, at the
ratio of 50 : 50.
1 250 ml
(1.3/1.1 US/Imp qt)
BRAKE + WHEEL
Unit: mm (in)
ITEM
STANDARD/SPECIFICATION
Brake lever play
Rear brake pedal height
Brake disc thickness
Front
Rear
Brake disc runout
Master cylinder bore
Front
Front
Rear
Brake caliper cylinder bore
Front
Rear
Brake caliper piston diam.
Front
Rear
Brake fluid type
0.1 – 0.3
(0.004 – 0.010)
5
(0.2)
3.0 ± 0.2
(0.118 ± 0.008)
4.5 ± 0.2
(0.177 ± 0.008)
———
Rear
Master cylinder piston diam.
NOTE
12.700
(0.5000
12.700
(0.5000
12.657
(0.4983
12.657
(0.4983
27.000
(1.0630
27.000
(1.0630
26.900
(1.0591
26.900
(1.0591
DOT 4
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
12.743
0.5017)
12.743
0.5017)
12.684
0.4994)
12.684
0.4994)
27.050
1.0650)
27.050
1.0650)
26.950
1.0610)
26.950
1.0610)
LIMIT
———
———
2.5
(0.098)
4.0
(0.16)
0.30
(0.012)
———
———
———
———
———
———
———
———
———
11-20
DR-Z400/EK2 (’02-MODEL)
ITEM
Wheel rim runout
Wheel axle runout
Wheel rim size
STANDARD
Axial
———
Radial
———
Front
———
Rear
———
Front
Rear
1.60 × 21
2.15 × 18
LIMIT
2.0
(0.08)
2.0
(0.08)
0.25
(0.010)
0.25
(0.010)
———
———
TIRE
ITEM
Cold inflation tire pressure
(Solo riding)
Tire size
Tire tread depth
STANDARD/SPECIFICATION
2
Front
Rear
Front
Rear
125 kPa (1.25 kgf/cm , 18 psi)
125 kPa (1.25 kgf/cm2, 18 psi)
80/100-21 51P or 80/100-21 M/C 51P
120/90-18 65P or 120/90-18 M/C 65P
Front
———
Rear
———
SUSPENSION
ITEM
Front fork stroke
LIMIT
———
———
———
———
4.0 mm
(0.16 in)
4.0 mm
(0.16 in)
Unit: mm (in)
STANDARD/SPECIFICATION
288
(11.3)
Front fork spring free length
510.6
(20.1)
Front fork oil level
122
(without spring)
(4.8)
Front fork oil type
SUZUKI FORK OIL SS-05
or an equivalent fork oil
Front fork oil capacity
720 ml
(each leg)
(24.3/25.4 US/Imp oz)
Front fork damping force adjuster
Rebound
15th clicks turn back
Compression
12th clicks turn back
Rear shock absorber gas
900 kPa
pressure
(9.0 kgf/cm2, 128 psi)
Rear shock absorber oil type
SUZUKI REAR SUSPENSION OIL SS-25
or an equivalent suspension oil
Rear shock absorber oil capacity
380 ml
(12.8/13.4 US/Imp oz)
Rear shock absorber spring
258.0
pre-set length
(10.2)
Rear shock absorber damping
Rebound
13th clicks turn back
force adjuster
*High speed
1¼ turns out
Compression
*Low speed 10th clicks turn back
LIMIT
———
500
(19.7)
———
———
———
———
———
———
———
———
———
———
———
———
DR-Z400/EK2 (’02-MODEL)
ITEM
STANDARD/SPECIFICATION
LIMIT
295
(11.6)
———
———
0.3
(0.01)
SPECIFICATION
NOTE
Rear wheel travel
Swingarm pivot shaft runout
11-21
ELECTRICAL
ITEM
Spark plug
Type
Gap
Spark performance
Ignition coil resistance
DENSO: U24ESR-N
NGK: CR8E
0.7 – 0.8 mm
(0.028 – 0.031 mm)
Over 8 mm (0.3 in) at 1 atm.
Primary
0.1 – 1.0 Ω
Secondary
12 – 20 kΩ
Ignition coil primary peak voltage
More than 150 V
Terminal –
Ground
Plug cap –
Terminal
: B/W,
: B/Y
Pick-up coil peak voltage
0.50 – 1.25 Ω
0.05 – 0.20 Ω
390 – 600 Ω
More than 5.0 V
Y –Y
B–W
G – Bl
: Bl,
:G
Signal coil peak voltage
More than 1.4 V
: B,
Generator coil resistance
Charging
Signal coil
Pick-up coil
Generator no-load voltage
(when engine is cold)
Regulated voltage
Generator Max. output
Starter relay resistance
Battery
Type designation
Capacity
More than 75 V (AC) at 5 000 r/min.
:W
Y –Y
13.5 – 15.0 V at 5 000 r/min.
200 W at 5 000 r/min.
3–5Ω
YT7B-BS
12 V 21.6 kC (6 Ah)/10 HR
WATTAGE
Unit: W
ITEM
Headlight
Brake light/Taillight
Turn signal light
Speedometer light
Neutral indicator light
High beam indicator light
Turn signal indicator light
SPECIFICATION
HI
LO
60
55
21/5
21
LED
2
2
2
11-22
DR-Z400/EK2 (’02-MODEL)
FUEL + OIL
ITEM
SPECIFICATION
Gasoline used should be graded 95 octane or
higher. An unleaded gasoline is recommended.
Fuel type
Fuel tank including reserve
reserve
Engine oil type
Engine oil capacity
10.0 L
(2.6/2.2 US/lmp gal)
2.3 L
(0.6/0.5 US/lmp gal)
SAE 10W/40, API SF or SG
1 700 ml
Change
(1.8/1.5 US/lmp qt)
1 800 ml
Filter change
(1.9/1.6 US/lmp qt)
1 900 ml
Overhaul
(2.0/1.7 US/lmp qt)
NOTE
DR-Z400/EK2 (’02-MODEL)
REAR SHOCK ABSORBER
OIL REPLACEMENT PROCEDURE
TOOLS AND EQUIPMENT
• The following tools and equipment are required to perform oil replacement.
1
2
3
4
5
6
7
8
9
*
OIL REPLACEMENT
• Remove the rear shock absorber unit from the frame ( 633), and then clean and dry it.
• Remove the spring from the rear shock absorber unit. ( 634)
NOTE:
* Inspect the rear shock absorber unit for oil leakage.
* Be sure to fully turn the rebound damping force adjusting screw
counterclockwise, so that the rear suspension oil can be poured
out easily.
• Remove the valve cap, and then press the valve with a screwdriver to bleed out nitrogen gas.
* Releasing high pressure gas from the rear shock absorber unit can be hazardous. Never perform any servicing until the nitrogen gas pressure has been released from the rear shock absorber unit.
* When releasing the gas pressure, place a rag over the
gas valve and use the tip of a screwdriver to press the
valve. Do not use your finger to depress the gas valve,
and be sure to direct the valve away from your face
and body.
* Be sure to always wear eye protection when performing this procedure.
• Remove the compression adjuster assembly from the rear
shock absorber using special tool.
09941-53640: R.C.U. compression adjuster wrench
Screwdriver or small punch
Vise*
Drain pan
Specified shock oil (SS-25)
Rags
Nitrogen tank
Filler hose and nozzle
Regulator assembly
Service manual
Not shown in the illustration
11-23
11-24
DR-Z400/EK2 (’02-MODEL)
• Move the rod and drain the oil completely into a drain pan.
• Push the valve core again to equalize atmospheric pressure.
• Fill a drain pan with the specified rear suspension oil.
• Place the rear shock absorber into the drain pan so that the
drain hole is submerged in the oil, and then fill the rear shock
absorber with the oil by stroking the rod.
99000-99001-S25:
SUZUKI REAR SUSPENSION OIL SS-25
Oil capacity:
Approximately 380 ml (12.8 US oz, 13.4 lmp oz)
• When fitting the orifice in the compression adjuster hole, face
the conical side to the valve side.
• Tighten the compression adjuster assembly to the specified
torque using the special tool.
Replace the remove O-rings with new ones.
Compression adjuster assembly:
30 N·m (3.0 kgf.m, 21.5 lb-ft)
09941-53640: R.C.U. compression adjuster wrench
• Fill the rear shock absorber unit with nitrogen gas.
Rear shock absorber gas pressure:
900 kPa (9.0 kgf/cm2, 128 psi)
• Tighten the gas valve cap.
* Use of flammable gas for pressuring the rear shock
absorber unit can be hazardous. Flammable gas such
as gas welding oxygen can create a fire hazard.
* Use nitrogen gas. If nitrogen gas is not available, compressed air free from water can be substituted.
* Applying too much pressure to the rear shock absorber
unit may rupture the rear shock absorber unit.
* Be sure to fill the rear shock absorber unit to the specified pressured.
DR-Z400/EK2 (’02-MODEL)
Riding the motorcycle with abnormal gas pressure can
damage the rear shock absorber unit. Low gas pressure
can result in oil leakage. Abnormal gas pressure cannot
provide normal performance of the rear shock absorber.
Be sure to fill the rear shock absorber unit to the specified pressure.
REASSEMBLY AND REMOUNTING
Reassemble and remount the rear shock absorber in the reverse
order of removal and disassembly. Pay special attention to the
following points:
• Install the spring, spring seat, and circlip.
• Turn the adjuster 1 to obtain the spring length A of
258.0 mm (10.16 in).
• Tighten the lock ring 2 to the specified torque.
Rear shock absorber lock ring:
90 N·m (9.0 kgf.m, 65.0 lb-ft)
SPRING SETTING TABLE
Standard
258.0 mm
(10.16 in)
Spring preset length
Softest
259.5 mm
(10.22 in)
Stiffest
247.5 mm
(9.74 in)
Do not set the spring less than 247.5 mm (9.74 in).
• Tighten the rear shock absorber upper and lower mounting
nut to the specified torque.
Rear shock absorber upper and lower mounting nut:
55 N·m (5.5 kgf.m, 40.0 lb-ft)
11-25
11-26
DR-Z400/EK2 (’02-MODEL)
• Apply THREAD LOCK SUPER “1303” to the seat rail lower
mounting bolt 4.
99000-32030: THREAD LOCK SUPER “1303”
• Tighten the seat rail upper mounting nut 3 and lower mounting bolts 4 to the specified torque.
Seat rail upper mounting nut:
35 N·m (3.5 kgf-m, 25.5 lb-ft)
Seat rail lower mounting bolt:
35 N·m (3.5 kgf-m, 25.5 lb-ft)
DAMPING FORCE ADJUSTMENT
After installing the rear suspension, adjust the rebound and compression damping force as follows.
NOTE:
Do not turn the adjust screws more than the given position or the
adjuster may be damaged.
REBOUND DAMPING FORCE ADJUSTMENT
Fully turn the damping force adjuster 1 clockwise. It is at stiffest
position and turn it out to standard position.
Standard setting position: 13 clicks out
COMPRESSION DAMPING FORCE ADJUSTMENT
Compression damping force could be adjusted in two stage by
turning the two adjusters.
High speed damping force
Fully turn the high speed damping force adjuster 2 clockwise. It
is at stiffest position and turn it out to standard position.
Low speed damping force
Fully turn the low speed damping force adjuster 3 clockwise. It
is at stiffest position and turn it out to standard position.
Standard setting position
High speed damping: 1 turn out
Low speed damping: 10 clicks out
HEADLIGHT
O
B/W
W
B/W
G
W
Bl
G
GENERATOR
B
Y
Y
B/Y
B/Y
B/W
B/W
OFF
RUN
Bl
Y
IGNITION
COIL
CDI UNIT
REGULATOR/RECTIFIER
_
CONDENSER
+
THROTTLE POSITION
SENSOR
Y
Y
O
Y
Y
B/Y
Y
W
O
Y
B/W
B/W
Bl
Bl
R
B/W
B/W
B
B
B/W
Y
Y
B/W
B/W
O
O
B/W
Bl
W
ENGINE STOP
SWITCH
Gr
B/W
O
B/W
TAILLIGHT
B .......
Bl . . . . . . .
G .......
Gr. . . . . . .
O .......
R .......
W. . . . . . .
Y .......
B/W . . . . .
B/Y . . . . .
Black
Blue
Green
Gray
Orange
Red
White
Yellow
Black with White tracer
Black with Yellow tracer
WIRE COLORS
DR-Z400/EK2 (’02-MODEL)
WIRING DIAGRAM
DR-Z400
11-27
Y
W
B
HEADLIGHT
O
B/W
W
B/W
IGNITION SWITCH
ON
OFF
R
R
PUSH
O
O
B/Y
Y/G
O
O
Gr
OFF
ON
Y/G
Bl
G
GENERATOR
Y/G
B/W
REGULATOR/RECTIFIER
CDI UNIT
B/Y
B/Y
B/W
B/W
Bl
Y
FUSE BOX
–
O
BATTERY
+
THROTTLE POSITION
SENSOR
M
STARTER MOTOR
STARTER RELAY
Bl
Bl
OFF
RUN
Y
Y/G
Y/G
Y
Y
IGNITION
COIL
Y
Y
Y
W
Y
Y
W
R
R
G
B/W
B/W
B/Y
B/W
W
B/W
Y
Y
R
CLUTCH LEVER
POSITION SWITCH
B/W
R
R
B
B/W
STATER BUTTON
Y/G
R/W
ENGINE STOP
SWITCH
B/W
B/W
Bl
R
B
Y
W
B
B .......
Bl . . . . . . .
G .......
Gr . . . . . .
O .......
R .......
W. . . . . . .
Y .......
B/W . . . . .
B/Y . . . . .
Bl/W . . . . .
R/W . . . . .
Y/G . . . . .
Black
Blue
Green
Gray
Orange
Red
White
Yellow
Black with White tracer
Black with Yellow tracer
Blue with White tracer
Red with White tracer
Yellow with Green tracer
WIRE COLORS
TAILLIGHT
Gr
B/W
O
B/W
11-28
DR-Z400/EK2 (’02-MODEL)
DR-Z400E
Face the tip of clip to the top
Face the tip of clip to the bottom
Face the tip of clip to the right
Face the head of screw to the front
Face the head of screw to the back side
Face the head of screw to the right side
Face the head of screw to the left side
Breather
hose
Engine
mounting
plate
Throttle cable
Starter motor
lead wire
(DR-Z400E)
Inlet hose
Clutch
cable
White mark
Overflow hose
Overflow tank
C
Do not insert the hose
to the hatching part.
C
Clutch cable
Yellow mark
Do not sticking
the clamp's tip out
from the hose.
Front
SECTION CC
(VIEW OF TOP)
Yellow mark
White mark
COOLING SYSTEM HOSE ROUTING
1
2
3
4
5
6
7
Yellow mark
Air
bleeder
bolt
Yellow mark
Radiator cap
Overflow hose
DR-Z400/EK2 (’02-MODEL)
11-29
Prepared by
3rd Ed. February, 2002
1st Ed. December, 1999
Part No. 99500-43022-01E
Printed in Japan
336
Printed in Japan
Y K1 K2
TK