Bajaj Legend

Bajaj Legend
Service Station Manual
USA
MODEL NO.: 00300728
NOTICE
All information contained in this manual is based on the latest product
information at the time of publication. Bajaj Auto Ltd. accepts no liability for
any inaccuracies or omissions in this publication , although every possible
care has been taken to make it as complete and accurate as possible.
All procedures and specifications subject to change without prior notice.
The right is reserved to make changes at any time without prior notice and
without incurring an obligation to make such changes to product
manufactured previously. Contact your authorised bajaj dealer for the
latest information on product improvements incorporated after this manual
was issued.
DOC. NO. 36 02 0147
FOREWORD
We have pleasure in presenting this Service Manual for Bajaj LEGEND This manual is designed
by bajaj auto ltd., primarily for use by authorised bajaj dealers and their qualified mechanics.
However, it contains enough details and basic information to make it useful to the vehicle owner
who desires to carry out his own basic maintenance and repair work.
Since a certain basic knowledge of mechanics, the proper use of tools, and workshop procedures
must be understood in order to carry out maintenance and repair satisfactorily; the adjustments,
maintenance, and repairs should be carried out only by qualified mechanic. If proper adjustment can
not be obtained by following the procedures in this manual, find out the cause and correct as
necessary.
In order to perform the work efficiently and to avoid costly mistakes, the mechanic should read the
text thoroughly, familiarising himself with the procedures before starting work, and then do the work
carefully in a clean area. Wherever special tool or equipment is specified, make sure that same are
used. Precision measurements can only be made if proper instruments are used and the use of
substitute tools may adversely affect safe operation of the vehicle.
The safety precaution and special instructions have been printed in bold type to draw your attention.
These instructions indicates points of particular interest for more efficient, convenient and safe
operation. It is essential that you do not neglect these instructions while carrying out repairs so as
to avoid any personnel injury and damage to or destruction of equipments and vehicle.
As the technique of repair/maintenance procedure develops and as the manufacturing process
changes, it is likely that this Service Station Manual will be subject to modifications as necessary.
The manual is therefore, to be taken valid for operation on the date of its print. For subsequent
modifications and informations always refer to Service Information Circulars.
This manual has been divided into various sections for convenience of presenting the contents in
a useful manner. Please refer to the detailed Index for locating the section/information you want.
WARNING : This manual is intended for use by experienced mechanics, and is not intended
for use by the general public. Therefore, please refer to the appropriate Owner's Manual for
warnings applicable to this scooter. Mechanical repair can be hazardous, and is very
dangerous if you are inexperienced or unknowledgeable. We strongly urge you to never
undertake repair operations with which you are not completely familiar. The repair operations
described in this book must be carried out exactly as described, in order to ensure that the
scooter is returned to safe condition after you have worked on it. Failure to observe this
warning can lead to a dangerous condition which could lead to an upset, accident, serious
injury, or even death.
INDEX
Sr.No.
Description
Page No.
1.
Identification Data
1
2.
Technical Specification
2
3.
General Information
4.
Periodic Maintenance Chart
5
5.
Check and Adjustments during P.D.I. and 1st, 2nd, 3rd, 4th & 5th Servicing
6
7.
Scheduled Maintenance
7-13
8.
General Precautions (Dismantling / assembly )
14-15
9.
Tightening Torques
16-17
10.
Special Tools
18-21
11.
Engine Exploded View
12.
Dismantling and Assembly : Engine
23-35
13.
Service Data : Engine
36-37
14.
Dismantling and Assembly : Chassis
38-46
15.
Service Data : Chassis
16.
Electricals
48-59
17.
Electrical Wiring Diagram
60-61
18.
Trouble Shooting Guide
62-63
3-4
22
47
IDENTIFICATION DATA
The chassis and engine serial numbers are used to register the vehicles. They are the only means of identifying
your particular vehicle from the other of the same model and type. These serial numbers may be needed by your
dealer when ordering the parts. In the event of theft, the investigating authorities will require both these numbers
in addition to the model, type and any special features of your vehicle that can help identification.
Serial numbers with prefix 28 C and 28 E are stamped on chassis and engine of the vehicle in the position indicated
in the figures below :
Engine number
Chassis number
The chassis and engine numbers serial numbers are used by the factory to identify your particular vehicle. Always quote
these numbers when ordering parts or when making inquiry with regard to service operations. The vehicle is identified by
the Department of Motor Vehicles in your state by the Vehicle Identification Number. It is a crime in all states to alter any
of these numbers.
Location of VIN Number
VIN Number
VIN Number
1
TECHNICAL SPECIFICATIONS
ENGINE & TRANSMISSION
Type
: Four stroke, Forced Air cooled.
No. of cylinders
: One.
Bore
: 57.00 mm
Stroke
: 57.00 mm
Engine displacement : 145.45 cc
Maximum net power : 9.00 HP / 6.71 kw at 6000 rpm.
Maximum net torque : 1.15 kgf.m.at 4000 rpm
Compression Pressure : 12 ± 1 kg/cm2
Compression Ratio : 9.3 : 1
Idling speed
: 1200 ± 150 rpm
Ignition system
: C. D. I.
Fuel
: 87 octane petrol.
Carburettor
: Keihin PB 20
Spark Plug
: Champion PL 7 YC
Spark plug gap
: 0.6 to 0.7 mm
Lubrication
: Wet sump, forced lubrication.
Starting
: Kick start / Electric start
Clutch
: Wet, multidisc type.
Transmission
: 4 speed constant mesh.
Overall gear ratios
First gear
: 17.33 : 1
Second gear : 10.81 : 1
Third gear
: 7.96 : 1
Fourth gear
: 6.11 : 1
Primary gear ratio
: 2.75 : 1
CONTROLS :
Steering
Accelerator
Gears
Clutch
Brakes
Front
Rear
CHASSIS AND BODY :
Frame type
: Monocoque construction
Suspension
Front
: Leading link Anti-dive ,variable
rate coil spring & double
acting shock absorber
Rear
: Variable rate coil spring &
double acting shock absorber
Brake type
Front & Rear : Mechanical expanding
shoe friction type.
Brake size
Front
: 150 mm dia / 5.91"
Rear
: 130 mm dia / 5.12"
Tires
Front
: 3.50 X 10, 4 P.R.
Rear
: 3.50 X 10, 4 P.R.
Tire pressure FRONT
: 1.25 kg/cm2 (18 Psi)
REAR (without pillion) : 1.75 kg/cm2 (25 Psi)
REAR (with pillion)
: 2.50 kg/cm2 (36 Psi)
Fuel tank capacity
: Handle bar
: Twist grip type on right hand
of handle bar
: Twist grip type on left hand of
handle bar
: Lever operated on left side of
handle bar
: Lever operated on right side of
handle bar
: Pedal operated by right foot.
ELECTRICALS :
System
Battery
Head lamp
Tail/stop lamp
Side indicator lamp
Horn
:
:
:
:
:
:
DIMENSIONS :
Length
Width
Wheel base
Height
Saddle height
: 1825 mm / 71.85"
: 685 mm / 26.97"
: 1275 mm / 50.20"
: 1150 mm / 45.28"
: 805 mm / 31.69"
WEIGHTS :
Curb weight
: 115 kg / 253 lbs
Max.total weight
(including driver)
PERFORMANCE :
Maximum speed
Climbing ability
12 Volts, DC
12V- 9Ah
35/35 W
5 / 10 W
10 W
12V, DC
: 256 kg / 564 lbs
: 90 km/h / 55 mph
with 68 kg/150 lbs
(single rider) payload
: 25.0 % max.
NOTES :
l All dimensions are under unladen condition.
l Above information is subject to change, for the
latest information please contact Service dept. .
: 1.32 Gal. (5 litres)
2
GENERAL INFORMATION
l Confirm that the turn indicator switch is “OFF” and
supplementary engine stop switch in “RUN” position.
l Press the Start Button to start the engine.
l Release start button as soon as engine starts.
RUNNING IN :
In the process of manufacturing the best possible materials
are used and all machined parts are finished to a very high
degree of accuracy. But 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 upon the care and
restraint exercised during its early life. The general
running in rules are :
When engine is cold :
l Pull the choke lever in 'ON' position.
l Press the Start Button with accelerator in completely
closed position.
l Once the engine warms up, release choke lever to
'OFF' position .
l
l
l
l
Always keep to the specified running-in speed.
Do not ride the vehicle at high speed.
Do not race the engine.
Do not run the engine under constant speed for
prolonged period, please vary the speed for better
bedding in of the mating parts.
l Do not start moving or race the engine immediately
after starting. Run the engine for a few minutes at
idle speed to give the oil a chance to workup into all
engine parts.
When engine is warm :
l While starting warm engine, open the accelerator 1/8th
to 1/4th and press the Start Button.
NEVER REV UP THE ENGINE TO HIGHER RPMs
IMMEDIATELY AFTER STARTING OR IN NEUTRAL
GEAR. If the engine is raved to higher RPMs immediately after starting it may lead to severe engine
damages as lubricating oil take some time to reach all th
components.
The table given below shows the maximum permissible
speed during running in :
Distance
in miles
Moving from ‘Stand still position’
Pull the clutch lever and twist the gear control tube
upwards in one smooth motion to put the vehicle in 1st
gear. Release clutch gradually and simultaneously open
the throttle gradually to move away from stand still
position.
Max. vehicle speed in
gears (mph)
Ist
IInd
IIIrd
IVth
10
20
30
40
0-1200
Don’t run vehicle with clutch lever partially depressed or
don’t slip the clutch to overtake or to climb a gradient.
This will damage the clutch.
STARTING : (Kick start)
l Turn the Ignition switch to 'ON' position.
l Confirm that the vehicle is in neutral gear, turn indicator switch is “OFF” and supplementary engine stop
switch in “RUN” position.
Downshifting of gears i.e.. Shifting from 4th to 3rd to
2nd to 1st gear :- Reduce the speed of the vehicle.
Depress the clutch lever completely and twist the gear
lever upwards and release the clutch lever gradually and
increase throttle. For further ease of gear shifting slightly
open the throttle momentarily while depressing the clutch
lever and then twist the gear lever upwards.
How to operate kick:
Move the kick slowly.
Ensure that ratchet is engaged, then kick.
When engine is cold :
Use ‘CHOKE’ only for cold starting. Do not open throttle.
Pull the choke lever and operate kick for starting.
Release the Choke lever to ‘ OFF’ position immediately
once the engine starts.
Do not tilt the vehicle towards spare wheel side. Engine
oil may drain out from the crankcase breather tube and
hence there will be a drop in oil level in the crankcase.
Accidently if the vehicles falls down on spare wheel side,
ensure correct oil level after lifting and placing the vehicle on stand.
When engine is warm :
Do not open throttle while kick starting. If the engine
fails to start with 2-3 kicks, slightly open the throttle (not
more than 1/4 th turn) before kicking.
Braking :
For stopping the vehicle smoothly and safely first close
the accelerator and then apply front and rear brake
simultaneously. Using only the front or rear brake is
dangerous and cause skidding and loss of control.
Anticipate your stop well in advance for avoiding sudden
braking which may be dangerous.
STARTING : (With Self Start)
l Turn the Ignition switch to 'ON' position.
l Confirm that the vehicle is in neutral gear otherwise
engine will not start.
(Neutral switch is fitted on gear shifter assly for this
purpose as a safety feature.)
3
l Don’t overload the vehicle above the specified pay
load.
Stopping the engine :
l Close the throttle.
l For stopping the engine, turn the key to 'OFF' position
of ignition switch.
l Supplementary engine stop switch on RH control
switch can also be used to stop the engine when
ignition switch is not to be put off.
l Use the accelerator judiciously. Think of the
accelerator barrel as fuel cock. The more you will
turn it, the more petrol will be consumed.
l For better fuel economy,change the gear as given
below :
Change 1st to 2nd gear at 6 mph.
Change 2nd to 3rd gear at 12 mph.
Change 3rd to 4th gear at 18 mph.
Drive at 18 to 30 mph in 4th gear.
Parking :
l Always prefer to park the vehicle on level ground and
on the centre stand.
l Lock the steering-cum-ignition lock.
l Cut off the engine if you want to stop more than for
two minutes. Remember, idling costs fuel.
DAILY SAFETY CHECKS :
Check the following items each day before you ride.
These checks hardly require any time and habitual
performance of these checks will help to ensure a safe,
reliable ride.
If any irregularities are found during these checks refer to
the maintenance chapter or contact an authorised bajaj
dealer for the action required to return your vehicle to a
safe operating condition.
Vehicle condition :
l Check all fuel lines and connections whenever your
vehicle smells of petrol. Never fill the petrol right up
to the filler cap.
l Always maintain the recommended tyre pressure
and check it every week. Under-inflated tyres
increases rolling resistance and thus costs both fuel
and tyre life.
Fuel :
l Ensure that the brakes are not dragging/binding.
Enough fuel for the planned distance of travel & check
leakage if any.
l For keeping the engine healthy :
q Inspect and clean the spark plug, adjust the
gap.
q Clean the air filter.
q Service carburettor and adjust idling speed.
q If there is a power loss, then contact an
authorised bajaj dealer and get the vehicle
properly tuned.
Electrical :
Operation of switches, lighting of head, tail /brake lamp,
horn sound ,battery electrolyte level and battery condition.
Brakes :
Front and rear brake effectiveness, lever play.
Regular maintenance will save fuel and money
assuring you trouble free, enjoyable and safe riding.
Tires :
Inflation pressure, cracks, cuts and foreign material
embedded in tread.
FUEL SAVING TIPS :
A well maintained vehicle can contribute a lot to the saving
of petrol. Following are a few simple tips for keeping your
vehicle healthy and your pocket wealthy.
Good riding habits :
l Ride smoothly and steadily at an optimum driving
speed of 18 to 25 mph.
l Don’t waste petrol by stop and go riding and by
sudden starts and stops.
l Avoid harsh braking. Do not brake unless it is very
essential, anticipate your stops, turns well in advance
and slow down by deceleration.
l Choose a proper route to ride especially in peak
hours.
4
The maintenance and adjustments outlined in this section are easily carried out and must be done in accordance with
the periodic maintenance chart to keep the vehicle in good running condition. The initial maintenance is vitally important
and must not be neglected.
PERIODIC MAINTENANCE CHART
FREQUENCY
WHICHEVER COMES FIRST
ODOMETER READING
(MILES)
SR.
NO.
OPERATION
EVERY
300
1200 3000
6000
9000
15000
1
Servicing
l
l
l
l
2
Engine oil: Replacement
l
l
l
l EVERY
l 3000 MILES
l
3
Oil strainer cleaning
l
l
l
EVERY 3000 MILES
4
Air filter element cleaning j
5
Spark plug : Cleaning/gap setting **
**
: Replace
l
3000 MILES
l
l
l
l
l
l
6000 MILES
Carburettor cleaning /overhaul **
l
l
7
Fuel line / Fuel Filter element cleaning
l
6000 MILES
l
l
l
6
Fuel Filter replacement if required
l
12000
l
l
l
l
l
l
l
l
l
l
l
l
l
8
Check & adjust valve clearance **
l
l
l
l
l
l
l
9
Control cables adjustment
l
l
l
l
l
l
l
10
Tightening nuts/bolts/fasteners
Month
l
l
l
l
l
l
l
11
Check functioning of all electrical components
Day
l
l
l
l
l
l
l
12
Head lamp alignments- check & adjust
l
l
l
l
l
l
l
13
Tire rotation
6000 MILES
14
Tire pressure
Week
l
l
l
l
l
l
l
15
Steering column : check and adjust
16
Front/rear brake : inspection/adjustment
l
l
l
l
18
l
l
: Overhaul
17
l
l
l
l
l
Month
l
l
l
l
l
l
l
Apply petroleum jelly on battery terminals Month
l
l
l
l
l
l
l
o
o
o
o
o
o
o
Check battery electrolyte level
Lubricate
a) Front and rear brake levers
b) Control cables , gear shifter
n
n
c) Speedo pinion/gears/cable
o
o
d) Brake cam shafts
After
e) Stand pivot
washing
f) Front fork bearing races/balls
the vehicle
o
g) Wheel bearings
h) Front suspension
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
Refer Page No. 15
l
n
Indicates operation to be performed.
Indicates lubrication by SAE 20W40 of API SC/CC grade oil.
o
j
**
Indicates lubrication by Lithium-calcium soap base grease.
To be cleaned more frequently in dusty area.
Must be performed to maintain emissions warranty.
5
CHECK & ADJUSTMENTS TO BE CARRIED OUT DURING
P.D.I., 1st, 2nd, 3rd , 4th & 5th SERVICING
Sr. No.
Operation to be carried out
P.D.I.
1st
2nd
3rd.
4th
5th
l
l
l
l
l
l
l
l
l
l
l
Check all nuts and bolts for
tightness especially handle bar bolt,
engine foundation bolt, shock absorber
nuts and wheel nuts etc.
l
l
l
l
l
l
4
Check Engine oil level and top
up, if necessary.
l
5
Flush and refill Engine oil
l
l
l
l
l
6
Remove and clean air cleaner filter element
l
l
l
l
l
7
Clean spark plug , adjust the gap and refit
l
l
l
l
l
8
Clean the carburettor / adjust idling speed
l
l
l
9
Check & adjust valve clearance
l
l
l
l
l
10
Carry out lubrication as per lubrication chart
l
l
l
l
l
11
Check steering-cum-ignition lock & other lock
for proper operation.
l
12
Check for smooth operation of choke lever
and accelerator.
l
13
Check front & rear brakes for efficient working.
l
l
l
l
l
l
14
Check and adjust steering.
l
15
Check all lights, horn, switches, speedometer
for satisfactory working.
l
16
Initial charging of battery. Install & apply
Petroleum Jelly on Terminals.
l
17
Check battery electrolyte level & apply
petroleum jelly on terminals
18
Test drive the vehicle.
l
19
Repair for any other defects seen or
observed during test drive
l
20
Clean the vehicle before delivery.
l
1
Wash and clean the vehicle on receipt
2
Check and correct tyre inflation pressure
including that of spare wheel
3
6
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
SCHEDULED MAINTENANCE
l Fit back the dipstick and tighten it securely.
l Ensure that there is no oil leakage.
CLEANING
The vehicle must be cleaned periodically by using
pressurised water. Before cleaning the vehicle cover the
important parts like ignition switch, silencer, ignition unit,
H.T. coil,starter motor by plastic bags. Don’t apply the jet
of water directly towards electrical parts such as switches,
ignition unit, coils etc. otherwise they may get damaged.
C
B
Brushing with parafin and wiping dry with clean rag is
advisable for external cleaning of the engine. All painted
surfaces should be washed with water. Do not use
kerosene or detergent soap on painted surfaces as it
damages the paint and turns it dull.
A
If necessary, blow with compressed dry air, the head lamp
reflector, clean or wipe off dust with a very soft feather
brush. After washing, dry the vehicle and carry out the
lubrication.
A) Oil filler hole
C) Upper level
D
B) Oil level gauge
D) Lower level
Oil replacement:
If the oil is used for a longer duration its lubricating
performance deteriorates. So it is necessary to replace
the oil in accordance with periodic maintenance chart.
For replacing the oil follow the procedure given below :
l Run the vehicle for few minutes.
l Place the vehicle on main stand. Let the oil settle.
l Remove the oil drain bolt with its aluminium washer.
Also take out dip stick. Let the oil drain completely.
Tighten the drain bolt with new aluminium washer
securely. (Tightening torque 2.6 - 3.0 kg.m.)
l By using a funnel pour the recommended oil from the
oil filler opening hole or open Inlet tappet cover & pour
oil.
l Fit back the dip stick and tighten it securely.
l Ensure that there is no oil leakage.
WARNING: Washing your scooter will allow the brakes to
become wet, with the same effect as riding on a wet road.
Whenever the brakes become wet, always dry them by
gently applying the brakes, repeatedly, until the heat
causes the brakes to dry and full brake function is
restored. Failure to follow this procedure can lead to loss
of brake effectiveness and a serious accident.
PERIODIC MAINTENANCE
Periodic maintenance (in accordance with the periodic
maintenance chart) of a vehicle is most important to
prolong its life , trouble free running and ensure your safety
while driving.
LUBRICATION
To reduce the friction between two moving parts lubricate
them periodically. Insufficient lubrication will cause rapid
wear, damaging the parts prematurely. Lubricate everytime
after washing the vehicle and whenever the vehicle is
operated under wet, rainy conditions. Before lubricating,
clean off any rusty parts and wipe off old grease, oil or dirt.
Do not use inferior grade of oil as a replacement for
the recommended oil, otherwise it will lead towards
engine troubles.
Oil capacity: 1100 ml (For newly assembled engine)
: 1000 ml (For drain & refill)
Recommended oil : SAE 20 W40 of API SC/SF grade
A few drops of oil are effective to keep bolts and nuts away
from rusting and sticking. This makes removal easier.
Please refer lubrication chart, for details of lubrication.
Replace oil after every 5000 kms / 3000 miles.
ENGINE OIL : Check engine oil level daily.
For proper functioning of cylinder block / piston , crankshaft,
tappets, clutch and transmission, the oil should be
maintained at an appropriate level.
Oil level inspection :
l Place the vehicle on centre stand, on a level ground.
l Clean the surface area around the oil filler opening.
l Unscrew the dipstick from oil filler opening hole and
wipe it dry.
l Put the dip stick, on oil filler opening , take out the dip
stick and observe the oil level on it.
l There are two marks engraved on it. If the level is
below the lower level mark, top up with the
appropriate quantity of recommended oil up to upper
level mark. If the oil level is too high i.e. above
the upper level mark, drain some oil from drain hole.
Drain bolt
7
SPARK PLUG
AIR FILTER :
The condition of the spark plug indicates how the engine
is operating. A defective spark plug will lead to difficult
starting and poor performance. Engine heat and
combustion chamber deposits will cause any spark plug
to slowly break down and erode over a period of use. The
spark plug should be removed periodically and inspected
for electrode gap and the colour at the tips, at regular
intervals as specified in periodic maintenance chart.
Bigger PU foam air filter is provided for better breathing.
If the air filter is clogged, intake air flow will be restricted
which results in low engine power ,increase in fuel
consumption & spark plug fouling.
Air filter removal :
l Open seat lock & lift the seat. Remove LH bonnet.
l Remove spare wheel.
l Pull 'Cover air filter slot' from slot provided on chassis
for inserting air filter assly.
l Take out air filter assly carefully from slot.
l Remove air filter element.
If the engine is operating correctly and the machine is
being ridden properly, the colour at the electrode tip will
be greyish yellow to light brown. The centre electrode
will not have pitting and the side electrode will have
constant thickness. The combustion chamber residues
left on the tip gives an indication of engine performance
as follows :
l Greyish yellow to light brown : Correct running
of engine. Spark plug is perfectly matched for
optimum engine performance.
l Shining black or wet carbon deposits : Presence
of oil in fuel.
l Burnt white/pearly deposits of metallic enamel
beads: Overheated engine, too lean air fuel mixture,
spark plug not fully tight, use of hotter plug.
l Dull black velvety carbon deposits : Too rich fuel
air mixture, electrode gap too wide, plug too cold,
clogged air cleaner, insufficient high tension voltage,
continuous slow speed driving.
Removal of air filter
Clean the spark plug preferably in a sand blasting device
and thoroughly clean off abrasive material left on it .
Air filter cleaning :
l Soak the element for about 1/2 minute in high flash
point stoddard solvent or equivalent.
l Squeeze the element, blow the air so that it dries.
l Dip the element in 20 W 40 oil. Soak the element for
about 1/2 minute.
l Squeeze the element hard, manually so that excess
oil is removed.
l Assemble the air filter assly. insert it inside slot.
l Fix the 'Cover air filter slot' on chassis.
Measure the gap between the electrodes with the wire
type thickness gauge, adjust the gap if incorrect by
bending the outer electrode carefully. The gap at the
electrode for optimum performance is 0.6 to 0.7 mm.
Connect the H.T. lead to spark plug, ground the plug and
check the current jumping across the plug electrode.
The bright blue spark should jump across the electrodes.
Replace the spark plug in case of following conditions:
1. Excessive electrode wear
3. Chipped off insulator
2. Cracked insulator.
4. Shorted plug.
DO NOT USE PETROL OR LOW FLASH POINT SOLVENT
FOR CLEANING. THIS MAY CAUSE BACK FIRE.
While installing back the spark plug, check for ;
1. The condition of sealing washer.
2. Cleanliness of contact surfaces of spark plug seat
and cylinder head seat.
Air filter element should be cleaned as per periodic
maintenance chart. If vehicle is operating in dusty roads
/ area the element should be checked and cleaned more
frequently.
When installing the plug, first screw it in with finger
and then use the spanner for the final tightening
only. This will prevent chances of stripping of the
cylinder head threads.
Recommended Spark Plugs :
Champion PL 7 YC
Spark Plug Cap : Resistance
Electrode gap : 0.6 to 0.7 mm
Wash
Spark Plug gap
8
Squeeze Out
And Dry
Oil
Squeeze Out
Excess oil
l Open and close the throttle a few times to make sure
that the idling speed does not change. Readjust if
necessary.
l With the engine idling, turn the handle bar to either
side. If the handle bar movement changes the idling
speed, the accelerator cable may be improperly
adjusted, damaged or improperly routed. Rectify
any of these conditions before riding.
l Do not attempt to compensate for faults in other
systems by adjusting the idle speed.
ACCELERATOR GRIP
The accelerator grip controls the movement of carburettor
throttle valve and ignition timing (For TRICS). If the
accelerator grip has excessive play due to cable stretch,
it will cause a delay in carburettor response especially at
low engine rpm and cause improper ignition timing. Also
throttle valve will not open completely in full throttle
condition. On the other hand, if the accelerator grip has no
play, control of carburettor throttle valve will be difficult. If
the inner cable is overstretched, idling rpm will be too high
and cause improper ignition timing.
Normal idling speed : 1200 ± 150 rpm
ACCELERATOR PLAY ADJUSTMENT :
l Check the accelerator play by lightly turning the grip
back and forth.
l Accelerator play can be adjusted by cable
adjuster (a) provided on carburettor. Loosen the
adjuster lock nut and turn the adjuster until specified
free play is obtained. Retighten lock nut after
adjustment is over.
A
ACCELERATOR GRIP PLAY : 4 - 5 MM.
C
B
D
A. Idling adjustment screw
C. Increase speed
A
B. Decrease speed
D. Air screw
REMOVAL OF WHEELS
For removal of wheels in case of puncture or Tire rotation,
follow the procedure given below :
Front wheel :
l Rotate wheel cover cap in anticlockwise direction
and take out.
l Pull wheel cover.
l Remove 5 nuts (3 special & 2 regular) and take out
front wheel assly.
l After mounting wheel, check the sequence of 5
mounting nuts.
Adjusters (A) on Carburettor.
CAUTION : Always maintain correct accelerator play.
It is very important for vehicles fitted with 'TRICS' as
the ignition timing is regulated by throttle opening.
IDLING SPEED ADJUSTMENT
Whenever the idling adjustment is disturbed follow the
procedure given below for setting proper engine idling.
l Open seat lock & lift the seat. Remove engine.
l Start engine & drive it for atleast 5 kms.or warm the
engine till the oil temp. reaches 800 C.
l Then set the engine idling r.p.m. by rotating the idle
adjustment screw clockwise or anticlockwise with
the help of a screw driver.
l For the precise adjustment of idling speed, use of
tachometer is recommended.
Front wheel nuts
9
brakes which can lead to loss of control, an upset, or a
serious accident with subsequent serious injury or even
death.
Rear wheel :
l Remove LH cover.
l Remove spare wheel
l Rotate wheel cover cap in anticlockwise direction
and take out.
l Pull wheel cover.
l Tilt the vehicle on engine side.
l Remove 5 nuts (3 special & 2 regular) and take out
front wheel assly.
l After mounting wheel, check the sequence of 5
mounting nuts.
3 to 5 mm
an
ti d
ive
Front Brake Lever Play
Front brake adjuster
REAR BRAKE ADJUSTMENT
Check the rear brake pedal play as shown in figure. If it
is more or less than the standard, adjust the rear brake.
Rear wheel nuts
l The adjusting nut for rear brake is located on rear
brake inner cable at the end.
l Depending upon the adjustment required, turn the
adjuster back or forth as follows :
Turning the adjusting nut in (clockwise direction)
increases the play at the brake pedal.
Turning the adjusting nut out (anticlockwise direction)
reduces the play at the brake pedal.
l After adjustment, check the wheel for free rotation
and for braking effectiveness.
l Rear brake shoe, liner wear can be checked through
the inspection window on rear brake drum, after
unscrewing the plug.
Inspection window
Installation :
l Install the rear wheel on brake drum studs.
l Install the plain and spring washers.
l Install the nuts and tighten them securely (Tightening
torque - 2 to 2.5 kg.m.)
BRAKES
Brakes should always be maintained in perfect condition
for safety. Brake drum wear, brake lining wear and brake
cable stretch causes the brakes to go out of adjustment.
This increases the free play at the brake lever and reduces
the braking efficiency.
"If the brake remain ineffective despite above
adjustments, check brake shoes , brake drum & brake
cable."
FRONT BRAKE ADJUSTMENT
Check the front brake lever play. If it is more or less than
the standard, adjust the front brake.
l The adjusting nut for front brake is located on front
brake inner cable at the end.
l Depending upon the adjustment required, turn the
adjuster back or forth as follows :
Turning the adjusting nut in (clockwise direction)
increases the play at the brake lever.
Turning the adjusting nut out (anticlockwise direction)
reduces the play at the brake lever.
l After adjustment, check the wheel for free rotation
and for braking effectiveness.
Rear Brake pedal Play
"If the brake remain ineffective despite above
adjustments, check brake shoes , brake drum & brake
cable."
WARNING: Never permit the operation of a scooter with
a brake cable in anything but absolutely perfect condition.
Any wearing or fraying of the cable can lead to ineffective
Rear brake adjusting nut
10
10 to 15 mm
TIRES
When exchanging the bulbs, always replace the bulbs
with that of the specified type and rating. This is important
to prevent the electrical lighting circuit from malfunctioning.
For better road-holding and longer tire life always maintain
correct air pressure. Overinflation will cause bumpy ride
and faster wear of the tire at the centre. Under-inflation will
cause poor steering and faster wear at the sides.
Head light bulb replacement :
For replacing head light bulb follow the procedure given
below :
Recommended Tire Pressure
Rear
l Remove 2 screws on Handle bar rear cover holding
Handle bar front cover.
1.25 Kg/cm2 (18 PSI)
Front
Solo
1.75 Kg/cm2 (25 PSI)
With Pillion 2.50 Kg/cm2 (36 PSI)
Tire wear/damage :
Worn out tire is unsafe. Replace the tyre when the tread
depth reaches to less than 3 mm.
FLASH
Tire tread depth :
Measure the tire tread depth by using the depth gauge. If
tread pattern is not visible, replace the tire. Also replace
the tire when the tire tread depth is found to be less than
the service limit.
Standard
Service limit
Handle bar cover (Rear) mounting screws.
5 to 6 mm
3 mm
l Remove one screw provided on H. Bar front cover
just below H. Light adjustment screw.
l Carefully disengage the locking lugs of handle bar
front cover by prying with the help of a small screw
driver.
l Disconnect Head Lamp harness coupler . Take out
Handle bar front cover with head lamp assly.
l Slide bellow from head lamp bulb holder.
Tire rotation :
To even out tread wear it is necessary to change the face
of tire and to rotate it position wise every 10000 kms.
Change the face of the tire in relation with the wheel rim
and inflate tire to the specified pressure. The good tire
should be kept at the rear, which is a driving wheel.
CONTROL CABLES :
Due to continuous operation of cables by the brake levers
and throttle the inner cables are subjected to wear and
tear. Cable maintenance is primarily concerned with
preventing deterioration due to rust and weather as well as
providing proper lubrication for free movement of inner
cables in the outer casing. For checking any of the control
cables follow the procedure given below :
l Disconnect the inner cable.
l Check free movement of the cable within its casing.
If movement is obstructed, check for fraying or
kinking of cable strands. If such damage is noticed,
replace the inner cable or cable assembly as
necessary.
l To lubricate cable, hold it in vertical position. Apply
necessary oil to uppermost end of cable and move
the inner cable to and fro. Leave it in vertical position
until the oil flows down to the lower end. Allow excess
oil to drain and reinstall the cable.
Head light bulb holder
l Remove bulb holder & replace bulb.
Note : Friction free cables do not require lubrication.
BULB REPLACEMENT :
11
Brake/Tail light, rear blinkers bulb replacement :
V
V
For replacing Tail/stop bulb or rear blinkers bulb, remove
2 screws for lens, take out lens & replace bulb.
15°
HV
H
5CM
1M/3.28 FT
HV
2M/6.56 FT
2M/6.56 FT
Hi Beam pattern
Low Beam pattern
Removal of screws for lens
Front blinker bulb replacement :
l Remove 2 mounting screws for nose grill and take out
nose grill.
l Remove 2 mounting screws for blinker and take out
blinker assly.
l Take out holder & replace the bulb.
Screw for head lamp adjustment
HEAD LIGHT BEAM ALIGNMENT
STEERING :
The headlight beam can be adjusted vertically and
horizontally. If adjusted too low, neither low nor high beam
will illuminate the road adequately. If adjusted too high,
the high beam will fail to illuminate the road.
Steering play :
If the steering is too tight, it will be difficult to turn the
handlebar quickly, the vehicle may pull to one side and the
steering stem bearings may become damaged. If the
steering is too loose, the handlebar will vibrate and the
vehicle will be unstable and difficult to steer in a straight
line.
l Keep the vehicle off the stand facing a wall.
l Inflate both front and rear tyres to specified inflation
pressure.
l There should be sufficient darkness.
l Keep the vehicle at a distance of 5 meter/16.4 ft from
a wall as shown in figure.
Inspection :
l Raise the front wheel off the ground.
l From the straight forward position of the handle bar
slowly push the handlebar to either side.
l If the handle bar to turn by the action of gravity and
continues moving until its stopper on L.H.and R.H.
side, the steering is not too tight.
l If the handle bar does not begin to turn by the action
of gravity, the steering is too tight necessitating
adjustment.
l Squat in front of the vehicle and grasp the lower ends
of the front fork. Push and pull the fork end back and
forth.
l If the play is felt the steering is loose, necessitating
adjustment.
SCREEN
1M/3.28 FT
HV
5 M/16.4 FT
VEHICLE OFF THE STAND
l Start the vehicle. Switch ON the Headlight high beam
and then lower beam.
l Check the beam pattern on the wall.
l For correct pattern of High beam & low beam, a screw
is provided below Head lamp assly. Loose this screw
before carrying out adjustment. Pressing Head light
assly at the top shifts the pattern up and pressing
Head light assly at the bottom, shifts the pattern down.
l The High beam pattern should be as shown in figure
and it should be 1 meter/3.28 ft. above the ground.
l The Low beam pattern should be set 5 cm below the
HV point as shown in the figure.
Adjustment :
l
l
l
l
12
Remove handle bar covers.
Loosen Handle bar bolt & lift up slightly.
Loosen the upper lock ring nut.
If the steering is too tight, loosen the lock nut a
fraction of turn; if the steering is too loose, tighten the
locknut a fraction of turn.
l Tighten the upper lock ring nut to a specified torque.
l Check the steering again. If the steering is still tight
or loose repeat the adjustment. If the proper condition
cannot be obtained inspite of correct adjustment,
inspect the steering parts.
l Install handle bar covers.
LUBRICATION OF FRONT SUSPENSION
The locations of Grease nipples and recommended
intervals for lubrication of Front suspension by grease (HP
multipurpose or equivalent) are as under.
Antidive link bushes & 'O' rings.
OIL STRAINER CLEANING
Lubricate at Every 2000 miles.
l Oil strainer is situated in side the bolt as shown in fig.
l Remove the bolt and take out oil strainer.
l Clean it with petrol. Apply air jet to dry oil strainer and
assembled back.
l Oil strainer should be cleaned in accordance with
periodic maintenance chart ( i.e. at every 3000
miles.)
Needle roller bearings of Front
brake panel.
Lubricate at Every 4000 miles.
Bushes & 'O' rings of Antidive
link & hub pin.
Lubricate at Every 2000 miles.
NON-USE MAINTENANCE
Oil strainer bolt
Non-use maintenance is necessary if a vehicle remains
off road for a longer duration. The correct and careful nonuse maintenance carried out before storing the vehicle will
prevent the vehicle from rusting and from such other nonoperational damages like fire hazards.
BATTERY MAINTENANCE
l For checking / topping up electrolyte level :
- Remove LH bonnet.
- Remove rubber strap holding battery and slide out
battery slightly for easy topping up.
l Remove battery filler cap & fill distilled water until
the electrolyte level in each cell reaches the upper
level line.
l Clean the entire vehicle thoroughly.
l Empty the fuel from the fuel tank and carburettor float
bowl (if fuel is left in for a longer time, the fuel will
break and could clog the carburettor.)
l Remove the spark plug and put several drops of 2T
oil into the cylinder. Kick the engine over slowly a few
times to coat the cylinder wall with oil and install back
the spark plug.
l Set the vehicle on a box or a stand so that both the
wheels are raised off the ground.
l Spray oil on all unpainted metal surfaces to prevent
rusting. Avoid getting oil on rubber parts or brake
shoes.
l Lubricate the control cables.
l Cover the entire vehicle neatly. Make sure that the
storage area is well ventilated and free from any
source of flames or spark.
l Remove battery from vehicle.
l Maintain electrolyte level at 'Upper Level'.
l Ensure that battery is fully charged. Charge the
battery once in a month.
l Keep the battery away from rain, dew, moisture &
direct sunlight. Store battery in cool & dry place.
CAUTION : Add only distilled water to the battery. Do
not use ordinary water for topping up , it will shorten
life of battery.
l Apply petroleum jelly to the terminals & assembled
back battery on the vehicle .
Location of battery
13
GENERAL PRECAUTIONS (Dismantling / assembly)
Before Servicing
Before starting to service a vehicle, careful reading of the
applicable section is recommended to eliminate
unnecessary work. Photographs, diagrams, notes,
cautions, warnings, and detailed descriptions have been
included wherever necessary. Nevertheless, even a
detailed account has limitations, a certain amount of
basic knowledge is also required for successful work.
(6)
High Flash-point Solvent
A high flash-point solvent is recommended to
reduce fire danger. Always follow manufacturer
and container directions regarding the use of any
solvent.
(7 )
Gasket, O-ring
Do not reuse a gasket or O-ring once it has been
in service. The mating surfaces around the gasket
should be free of foreign matter and perfectly
smooth to avoid oil or compression leaks.
Especially note the following:
(1 )
(2 )
Dirt
Before removal and disassembly, clean the
vehicle. Any dirt entering the engine or other parts
will work as an abrasive and shorten the life of the
vehicle. For the same reason, before installing a
new part, clean off any dust or metal filings.
(8 ) Press
A part installed using a press or driver, such as a
wheel bearing, should first be coated with oil on its
outer or inner circumference so that it will go into
place smoothly.
(9 ) Ball Bearing
When installing a ball bearing, the bearing race
which is affected by friction should be pushed by
a suitable driver. This prevents severe stress on
the balls and races, and prevents races and balls
from being dented. Press a ball bearing until it
stops at the stop in the hole or on the shaft.
Tightening Sequence
Generally, when installing a part with several
bolts, nuts, or screws, they should all be started in
their holes and tightened to a snug fit. Then
tighten them evenly in a cross pattern. This is to
avoid distortion of the part and/or causing gas or
oil leakage. Conversely when loosening the bolts,
nuts, or screws, first loosen all of them by about a
quarter of turn and then remove them.
(l0 )
Where there is a tightening sequence indication in
this Service Manual, the bolts, nuts, or screws
must be tightened in the order and method
indicated.
(3 )
(4 )
(5 )
Oil Seal and Grease Seal
Replace any oil or grease seals that were removed
with new ones, as removal generally damages
seals.
When pressing in a seal which has manufacturer’s
marks, press it in with the marks facing out. Seals
should be pressed into place using a suitable
driver, which contacts evenly with the side of seal,
until the face of the seal is even with the end of the
hole.
Torque
The torque values given in this Service Manual
should always be adhered to. Either too little or too
much torque may lead to serious damage. Use a
good quality, reliable torque wrench.
(11 ) Seal Guide
A seal guide is required for certain oil or grease
seals during installation to avoid damage to the
seal lips. Before a shaft passes through a seal,
apply a little oil, preferably high temperature grease
on the lips to reduce rubber to metal friction.
Force
Common sense should dictate how much force is
necessary in assembly and disassembly. If a part
seems especially difficult to remove or install, stop
and examine what may be causing the problem.
Whenever tapping is necessary, tap lightly using
a wooden or plastic faced mallet. Use an impact
driver for screws (particularly for the removal of
screws held by a locking agent) in order to avoid
damaging the screw heads.
(12 ) Circlip, Retaining Ring
Replace any circlips and retaining rings that were
removed with new ones, as removal weakens and
deforms them. When installing circlips and
retaining rings, take care to compress or expand
them only enough to install them and no more.
Edges
Watch for sharp edges, especially during major
engine disassembly and assembly. Protect your
hands with gloves or a piece of thick cloth when
lifting the engine or turning it over.
(13 ) Cotter Pin
Replace any cotter pins that were removed with
new ones, as removal deforms and breaks them.
14
(16 ) Replacement Parts
When there is a replacement instruction, replace
these parts with new ones every time they are
removed. These replacement parts will be
damaged or lost their original function once
removed.
(14 ) Lubrication
Engine wear is generally at its maximum while the
engine is warming up and before all the rubbing
surfaces have an adequate lubricative film. During
assembly, oil or grease (whichever is more
suitable) should be applied to any rubbing surface
which has lost its lubricative film. Old grease and
dirty oil should be cleaned off. Deteriorated grease
has lost its lubricative quality and may contain
abrasive foreign particles.
(17 ) Inspection
When parts have been disassembled, visually
inspect these parts for the following conditions or
other damage If there is any doubt as to the
condition of them, replace them with new ones.
Don’t use just any oil or grease. Some oils and
greases in particular should be used only in certain
applications and may be harmful if used in an
application for which they are not intended. This
manual makes reference to molybdenum disulfide
grease (MoS2 ) in the assembly of certain engine
and chassis parts. Always check manufacturer
recommendations before using such special
lubricants.
Abrasion
Hardening
Bent
Scratch
Colour change
Seizure
(18 ) Service Data
Numbers of service data in this text have following
meanings:
(15 ) Electrical Wires
All the electrical wires are either single-colour or
two-colour and, with only a few exceptions, must
be connected to wires of the same colour. On any
of the two-colour wires there is a greater amount
of one colour and a lesser amount of a second
colour, so a two-colour wire is identified by first the
primary colour and then the secondary colour. For
example, a yellow wire with thin red stripes is
referred to as a “yellow/red” wire; it would be a
‘’red/yellow” wire if the colours were reversed to
make red the main colour.
Wire (cross-section)
“Standards” : Show dimensions or performances
which brand-new parts or systems have.
“Service limits”: Indicate the usable limits. If the
measurement shows excessive wear or
deteriorated performance, replace the damaged
parts.
Name of Wire Color
Red
Wire strands
Crack
Warp
Dent
Wear
Deterioration
Yellow/red
Yellow
Red
15
TIGHTENING TORQUES
ENGINE
SR. NO.
PART NAME
TORQUE - Kgm.
NUTS FOR :
1
Crankcase to Crankcase (Qty. 5)................................................................................... 1.5 to 1.8
2
Gear shifter housing (Qty. 2) .......................................................................................... 1.3 to 1.5
3
Cylinder Head (Qty. 4) ................................................................................................... 2.0 to 2.2
4
Crankshaft clutch side (Gear primary spur) ................................................................... 9.0 to 9.5
5
Crankshaft magneto side (Rotor nut) ............................................................................. 5.5 to 6.0
6
Intermediate shaft (For clutch assly) .............................................................................. 9.0 to 9.5
7
Tappet ............................................................................................................................ 0.8 to 1.0
8
Main shaft ....................................................................................................................... 5.0 to 5.5
9
Cover to Crankcase ....................................................................................................... 1.3 to 1.5
10
Silencer to Cylinder head ............................................................................................... 2.0 to 2.5
11
Crankcase to Crankcase (Qty. 2)................................................................................... 1.3 to 1.5
12
Kick lever ........................................................................................................................ 2.0 to 2.5
BOLTS FOR :
13
Cylinder head to Cylinder Block (Qty. 2) ........................................................................ 0.9 to 1.1
14
Silencer to Crankcase (Qty.1) ........................................................................................ 3.0 to 3.5
15
Cam shaft sprocket ........................................................................................................ 1.1 to 1.3
16
Cam chain tensioner adjuster ........................................................................................ 0.8 to 1.0
17
Manifold to Cylinder head .............................................................................................. 0.6 to 0.8
18
Chain tensioner body ..................................................................................................... 0.6 to 0.8
19
Cover to Crankcase ....................................................................................................... 1.3 to 1.5
20
Oil drain bolt ................................................................................................................... 2.6 to 3.0
SCREWS FOR :
21
Stator plate ..................................................................................................................... 0.6 to 0.8
22
Screw for oil tube assly .................................................................................................. 0.3 to 0.4
23
Stopper plate (Cylinder head) ........................................................................................ 0.6 to 0.8
24
Gear shifter cover ........................................................................................................... 0.6 to 0.8
25
Guide kick (Qty. 2) ......................................................................................................... 0.6 to 0.8
GENERAL :
26
Spark plug ...................................................................................................................... 2.5 to 3.0
27
Cap (Cylinder head) ....................................................................................................... 0.8 to 1.0
28
Oil plug ........................................................................................................................... 2.6 to 3.0
16
TIGHTENING TORQUES
CHASSIS
SR. NO.
PART NAME
TORQUE - Kgm.
NUTS FOR :
1
Front shock absorber ..................................................................................................... 3.0 to 3.5
2
Fuel cock assly on Fuel tank .......................................................................................... 3.0
3
Engine link mounting on chassis.................................................................................... 3.0 to 4.0
4
Engine mounting on link ................................................................................................. 3.5 to 4.0
5
Pivot securing wheel hub ............................................................................................... 5.0 to 5.5
6
Wheel assly on brake drum (Qty. 5) .............................................................................. 2.0 to 2.7
BOLTS FOR :
7
Handle bar mounting ...................................................................................................... 3.2 to 3.8
8
Rear shock absorber to engine ...................................................................................... 2.0 to 2.3
9
Front mudguard ............................................................................................................. 0.25 to 0.3
10
Stand .............................................................................................................................. 0.4 to 0.5
STEERING :
11
Upper bearing race ........................................................................................................ 0.6 to 0.7
12
Ring nut .......................................................................................................................... 5.0 to 6.0
17
SPECIAL TOOLS
The special tools recommended for carrying out repairs / overhauls are illustrated below. These tools are designed to
facilitate quick and safe repairs. Use of these special tools is recommended to carry out repairs efficiently and for
avoiding costly mistakes such as damages to parts, injuries etc. The following list contains for each tool the description,
tool application and an illustrative sketch.
1.
37-0030-01 : Engine support stand
4. 37-1014-10 : Extractor for input shaft bearing.
For supporting engine, crankcase while assembly /
dismantling.
To be used for removing input shaft bearing from
crankcase clutch side.
2. 37-1003-02 : Extracter
5. 37-1014-13 : Inner driver
Extractor for needle bearing in crankcase magneto
side.
To be used with holder and outer bearing driver for
installing front brake drum bearing.
3. 37-1005-04 : Bearing Driver
6. 37-1014-14 : Inner driver
Driver for fitting needle bearing in crankcase magneto
side.
To be used with holder & outer bearing driver for
installing input shaft bearing in crankcase (clutch side)
& needle bearings in front brake drum.
18
7. 37-1028-32 : Spur gear holder
11. 37-1030-61 : Bearing driver set
Tool for holding primary gear while removing nut.
Inner Driver f 20 - used with Bearing Driver set for
installing main shaft bearing & magneto side oil seal.
8. 37-1030-34 : Rotor puller
Inner Driver f 25 - used with Bearing Driver set for
installing main shaft oil seal
12. 37-1031-07 & 37-1031-08 : Valve spring
compressor assembly with adopter.
For pulling magneto rotor from crankshaft.
9. 37-1030-48 : Bearing puller
Used for taking out inlet & exhaust valves by
compressing valve spring in cylinder head.
13. 37-1031-52 : Clutch holder.
Bearing puller for extracting bearing from input shaft.
10. 37-1030-54 : Magneto rotor holder
Used for hold the clutch housing stationary while
loosening & tightening the clutch hub nut.
For holding the magneto rotor stationary while
loosening or tightening the rotor nut.
19
14. 37-1031-53 : Valve adjusting screw driver
18. 37-1801-06 : Bearing races assembly tool
Used for holding screw while adjusting valve clearance.
To be used for installing the upper and lower bearing
race on chassis tube.
15. 37-1519-03 : Bearing driver
19. 37-1805-08 : Bearing driver for fork assembly
To be used with bearing driver set (37-1030-61) for
assembling needle roller bearing in front brake drum.
To be used for fitting lower bearing race on front fork
tube.
16. 37-1519-04 : Driver
20. 37-1819-03 : Bearing driver
For assembling speedometer gear & spacer in front
wheel brake drum.
Tool for assembling needle roller bearings in steering
column.( To be used alongwith 37-1014-14)
17. 37-1519-05 : Adopter
21. 37-1819-04 : Bearing extracter
For removing speedometer gear & spacer from front
wheel brake drum.( To be used with 37-1001-14)
Tool for removing needle roller bearings from steering
column.
20
22. 37-10BA-56 : Bearing extractor
To remove main shaft ball bearing from crankcase cover.
23. 37-1030-79 : Crankshaft alignment fixture
To be used for mounting crankshaft while checking its
run out.
24. 67-7505-51 : Compression Tester
To be used for checking compression pressure in the
cylinder.
25. 37-1030-63 : Hand tester
For checking electrical components. Refer Electrical
Maintenance.
26. 69-7505-26 & 69-7505-28 : Torque wrenches
To be used for tightening fasteners to specified torque.
27. 37-2031-02 : Battery charger ( 12T6 - 12V)
For charging battery.
28. 67-1691-69 : Hydrometer
For checking specific gravity of electrolyte.
21
22
ENGINE DISMANTLING
l Take out the engine carefully from the chassis.
l Take out rear wheel and mount the engine on
support stand P.No. 37 1030 01.
REMOVAL OF ENGINE FROM VEHICLE :
l Remove both LH and RH bonnets.
l Drain Engine oil completely by removing drain plug.
A
B
C
C
D
A
B
A) Throttle cable
C) Screw for Duct
A) Drain Plug
B) Nut for rear brake cable
C) Nut for gear shifter assly.
B) Choke cable
D) Intake manifold
l Disconnect lower ends of rear brake & clutch cable.
l Remove gear shifter cover and release lower ends
of gear cables by unscrewing screw terminals.
l Remove H.T. Coil by removing 2 screws on
crankcase side.
A
B
A
A) Nut for silencer
B) Nut for mounting engine on link
ENGINE DISMANTLING :
l Mount the engine on support stand .
l Remove fan cover and cowling.
A) Screws for removal of H.T. coil
A
l Disconnect magneto harness coupler from main
harness.
l Disconnect choke and throttle cable from carburettor.
l Disconnect duct from carburettor. Disconnect
carburettor from intake manifold. Disconnect fuel
pipe and sensing pipe.
l Remove silencer by removing 2 nuts at the exhaust
port of cylinder block and 1 bolt on crankcase arm.
l Remove bolt fixing lower end of rear shock
absorber to the engine.
l Hold engine carefully and then remove the bolt
fixing crankcase arm with engine mounting link on
chassis.
l Hold engine carefully & remove the bolt fixing
c,case arm with engine mounting link on chassis.
A
A
A
A) Screws for removal of cowling
23
A
l Remove rear brake drum by following method :- Straighten bent edges of split pin and pull it out
with the help of plier. Remove the cap.
- Remove castle nut and washer.
- Pull out the brake drum.
on camshaft. Slide out timing chain from sprocket
and take out sprocket.
l Remove 4 nuts and 2 bolts mounting cylinder head on
crankcase alongwith 4 special washers.
l Remove cylinder head.
l Take out lower guide chain (slack) from cylinder
block.
A
A
B
A) Castle nut for removal of Rear brake drum.
l Removal of Rear brake drum back plate - Hold the brake shoes with a clean cloth to protect
the linings from grease and dirt. Lift the outer
portion of brake shoes, turn them upward and
remove them.
- Remove the springs to separate the two shoes.
- Remove back plate by removing 3 screws with
spring washers.
- Remove 2 'O' rings & gasket on c'case cover.
A) Bolts for cam chain tensioner assly.
B) Bolts for intake manifold assly.
A
A
A
A) Bolts for OCH cover.
A
D
A) Screws for Removal of back plate
C
B
C
CYLINDER HEAD REMOVAL :
l Take out spark plug cap and spark plug.
l Remove cam chain tensioner by removing 2 bolts
fitted on cylinder block.
l Remove intake manifold by removing 3 bolts fitted on
cylinder head.
l Remove OHC cover by removing 2 flanged bolts.
l Remove both the caps of valves by using 24 mm
spanner.
l Rotate magneto assembly and ensure piston is at
TDC and both tappets are free.
l Remove 2 flanged bolts fixing timing chain sprocket
C
C
A
A) Cap for valve B) Bolts for timing chain sprocket
C) Nuts for cylinder head D) Bolts for cylinder head
24
l Remove rotor nut by holding rotor with the help of
rotor holder (37 1030 54).
CYLINDER BLOCK PISTON REMOVAL :
l Take out cylinder head as explained above.
l Remove the cylinder head gasket and dowel pins.
l Pry up the cylinder with a suitable tool to free the
cylinder from crankcase.
l Lift the cylinder off and guide the cam chain through
the tunnel in the cylinder.
l Take out cylinder along with oil seal from piston.
Removal of nut for magneto rotor
l Remove nut alongwith spring washer.
l By using rotor puller (37 1030 34) take out rotor.
Removal of cylinder head
l Remove one of the piston pin snap rings.
l Push out the piston pin and remove the piston.
Removal of magneto rotor
l Take out stator plate assembly by removing screws.
Removal of piston assly.
A
MAGNETO ASSEMBLY DISMANTLING :
l Remove 4 bolts mounting fan on rotor.
A
A
A
A
A) Stator plate assly. mounting screws
A
A
A) Fan mounting bolts.
25
l Hold the wheel clutch with the help of clutch holder
(37 1031 52). Remove clutch hub nut.
NOTE : HUB NUT HAS LEFT HAND THREADING .
GEAR SHIFTER REMOVAL :
l Remove 2 nuts mounting gear shifter on crankcase.
l Engage 4th gear & pull out gear shifter complete.
A
A
Clutch holder
Nuts for gear shifter assly.
l Remove housing complete clutch alongwith wheel
clutch.
l Store housing complete clutch, collar, spacer
carefully.
l Hold primary spur gear with the help of special tool
(37 1028 17) and remove the special nut.
l Take out primary spur gear alongwith the key. Take
out parallel pin and spring from the crankshaft.
NOTE : Removal of special nut for primary spur gear
is required only if primary gear or crankshaft is to
be replaced.
REMOVAL OF CLUTCH COVER (C'CASE COVER):
l Loosen 6 flanged bolts and remove them.
l Remove 4 nuts alongwith plain and spring washers.
A
A
B
A) Bolts ,B) Nuts for mounting clutch cover
l Take out clutch cover by tapping the cover gently
using Nylon mallet. Remove two dowel pins.
l Remove plunger oil from the crankshaft .
l Remove clutch release bearing & bearing seat.
l Remove the 6 bolts of clutch and take out
6 springs alongwith holder plate.
Removal of primary spur gear
A
A
D
B
C
B
Removal of plunger (A)
A) Bolt for guide chain
C) Screws for oil tube
B) Bolts for holder
26
B
B) Screws for oil pump
D) Screws for baffle
l Remove guide chain (tension) by removing the
special bolt.
l Take out timing chain.
l Remove oil pump assembly by removing 3 screws.
Take out dowel pin and two 'O' rings carefully and
store them alongwith oil pump.
l Take out screw pan cross and take out oil tube
alongwith oil seal.
l Take out baffle by removing 2 screws.
SPLITING OF CRANKCASE HALVES :
l Take out oil strainer cap bolt alongwith oil strainer
mesh.
Spliting of crankcase halves
B
C
A
OIL
Removal of oil strainer
A) Crankshaft assly.
C) Intermediate shaft assly.
l Loosen all the 10 nuts fixing crankcase clutch and
magneto side together.
l Remove the nuts and take out bolts, plain & spring
washers and store them properly.
B) Mainshaft assly.
DISMANTLING OF SUB-ASSEMBLIES :Crankcase Magneto Side :
l Remove 'D' bolt and nut alongwith plain & spring
washer for kick starter lever.
l Tap the kick shaft assembly lightly to take it out from
crankcase.
l Remove 'O' ring from kick shaft from crankcase.
l Take out needle roller bearing for main shaft by
using special tool P. No. 37 1003 02.
Crankcase joining nuts
l Gently tap the crankcase magneto side with the
help of nylon mallet and take out.
l Remove crankshaft assembly alongwith float
control rubber ring.
l Take out mainshaft assembly.
l Remove intermediate shaft by tapping gently from
crankcase cover side.
Removal of needle roller bearing
27
l Take out oil seal for crankshaft magneto side.
l Remove the plunger.
l Remove the spring for clutch spindle assembly.
l Take out clutch spindle assembly alongwith
internal lever and plain washer.
l Remove 'O' ring.
Main Shaft :
Removal of crankshaft magneto side oil seal
l Take out guide kick by removing 2 screws.
Crankcase Clutch Side :
l Remove ball bearing from crankcase clutch side.
Mainshaft assly. dismantling
l Push the cup slightly towards the gear wheels.
l Press both the springs for gear selector against the
gear selector with the help of a thin plate or hacksaw
blade and lift out the cup from mainshaft. Take out
2 springs & balls carefully.
l Take out circlip alongwith shoulder ring.
l Take out gear wheels one by one.
l Take out shoulder washer and circlip.
l Remove stem after unlocking the lock washer
NOTE : STEM HAS LEFT HAND THREADING .
l Take out gear selector.
l Remove cross from mainshaft.
Removal of ball bearing
Intermediate Shaft Assembly :
l Remove the bearing from the shaft by using special
tool P.No. 37 1030 48.
Crankcase Cover (Clutch cover) :
l Remove circlip for mainshaft bearing by using
circlip plier.
l Remove ball bearing for mainshaft by using extractor
P. No. 37 10BA 56.
Removal of bearing
l Remove kick driven gear.
l Remove 4th driver gear.
l Remove cluster gear.
Removal of ball bearing for mainshaft
l Remove oil seal for mainshaft.
28
l Loosen valve spring compressor and take out
valve spring retainer, valve spring and spring seat.
l Push out one valve.
l Repeat same procedure for the other valve.
Clutch Dismantling :
l Take out hub clutch.
l Take out plate friction and plate clutch one by one.
Kick Shaft Dismantling :
l Remove circlip holding the spring guide.
l Remove spring guide by nose plier.
l Remove spring by taking it out from the hole
provided on the kick shaft.
l Remove the circlip alongwith the washer.
l Take out gear kick alongwith washer on other side
of gear. Remove circlip and take out ratchet gear.
l Remove spring coil and cup kick shaft.
l Remove circlip.
Clutch dismantling
Cylinder Head :
l Remove stopper plate by removing screw .
l Take out inlet rocker arm shaft by using a bolt.
l Take out exhaust rocker arm shaft by nose plier.
Kick Shaft Dismantling
ENGINE ASSEMBLY
REASSEMBLING OF SUB-ASSEMBLIES :
Kick Shaft Assembly :
l Fix circlip for the gear kick on kick shaft and assemble
washer on it.
l Assemble gear kick on kick shaft.
l Put one washer on gear kick & fix circlip on it.
l Assemble ratchet gear on the serrations of kick
shaft in such a way that the dot mark punched on
the beginning of serrations on kick shaft matches
with the dot mark on the ratchet gear.
l Fix coil spring on shaft and put cup kick shaft.
l Fix circlip over the cup kick shaft.
l Assemble kick return spring on the shaft in such a
way that hook on inner diameter of spring is located
in hole on kick shaft.
l Put nylon spring guide on the kick shaft and fix
circlip.
Removal of rocker arm shaft
l Take out both the rocker arms.
l Take out camshaft.
l Using valve spring compressor and adaptor press
down the valve spring retainer.
l Remove the collets.
Cylinder Head Assembly :
l Smear slight amount of grease on valve.
l Push inlet valve into the valve guide from combustion
chamber side.
l Put spring seat, valve spring and valve spring
retainer from the other side. The loose coil ends of
the spring should be facing downwards.
Removal of valve
29
l Use the valve spring compressor to press down the
valve spring retainer.
l Install the collets, and slowly remove the spring
compressor. Ensure that the collets are seated
properly holding the retainer down.
l Repeat same procedure for exhaust valve.
l Assemble cam shaft.
l Assemble both rocker arms & then respective pins.
l Fix locking plate for camshaft and inlet rocker arm pin
with the help of screw pan cross.
Main shaft Assembly :
Clutch Assembly :
l Take wheel clutch and assemble plate friction and
plate clutch alternatively on it starting with a friction
plate.
l Insert Hub clutch into the subassembly described
above by matching teeth of Hub clutch and mate
clutch.
l Then place the above described subassembly into
Housing complete clutch.
l First assemble circlip on the main shaft (towards
threaded end of mainshaft).
l Put shoulder washer on the circlip.
l Hold mainshaft vertical and slide cross into the slots
of mainshaft. Position the cross in the slots where a
circular groove is provided and rotate cross by 90°.
Check that the projection provided at the centre of
cross is facing upwards.
l Assemble gear selector inside main shaft. Match the
projection on the cross with the slot of gear selector.
Check that the grooves provided on Gear selector are
facing towards the holes provided on mainshaft for
fixing spring loaded balls.
l Assemble washer on the gear selector.
l Tighten the stem on the cross.
CAUTION : STEM HAS LEFT HAND THREADING.
l Assemble 1st gear wheel (largest) on the mainshaft in
such a way that the larger collar should be facing
towards stem side or lesser collar should be facing
towards threaded end of mainshaft.
l Assemble 2nd gear wheel (2nd largest) on the mainshaft
in such a way that the larger collar is facing towards
1st gear wheel.
l Assemble 3rd gear wheel on to the mainshaft in such
a way that the larger collar is facing towards 2nd gear
wheel.
l Assemble 4th gear wheel in such a way that the larger
collar is facing towards 3rd gear wheel.
l Then assemble shoulder washer and fix circlip.
l Put one steel ball into each of two holes provided
on the mainshaft after smearing slight amount of
grease on it.
l Assemble spring on each ball.
l Compress both the springs with the help of thin plates
or hacksaw blade and assemble the cup on the
springs.
The cup should be assembled in such a way that
lower diameter of cup should be facing towards gear
wheels.
3rd friction plate
(P.No.28 10 1184)
Sequence of clutch plate assly.
Intermediate Shaft Assembly :
l Assemble cluster gear on intermediate shaft in such
a way that small gear of the cluster gear faces
towards threaded end of the shaft.
l Then assemble 4th driver gear wheel.
l Assemble kick driven gear.
l Then press bearing on the intermediate shaft.
Clutch Cover Assembly :
l Press first oil seal then bearing & fix circlip for
mainshaft from the outer side of clutch cover.
l Assemble adjuster with nut for Rear brake cable .
Intermediate Shaft Assembly
30
l Assemble 'O' ring into the bore for clutch lever.
l Assemble spring & plain washer on clutch lever
spindle.
l Smear light coat of grease on clutch lever spindle and
assemble it into the clutch cover alongwith internal
lever.
l Lock the spring on the clutch cover lug.
l Apply some grease on plunger and assemble it on the
internal lever.
Crankcase Clutch Side :
l Press ball bearing for intermediate shaft.
Assembly of needle roller bearing
Fitment of bearing
Fitment of oil seal
l Assemble 'O' ring inside the hole for kick shaft.
l Assemble kick shaft assembly & intermediate shaft
assembly at a time in their respective positions in
crankcase.
Assemble of oil pump
l Assemble 2 'O' rings for oil pump on the crankcase.
l Assemble hallow dowel pin.
l Assemble oil pump with the help of 3 screws and
check freeness of oil pump gear.
l Assemble baffle with the help of 2 screws.
l Assemble rubber bush on the steel tube and press
this assembly into the hole on crankcase.
l Fix the tube with the help of a screw.
l Fit oil drain plug alongwith washer.
l Assemble adjuster for clutch cable.
Kick shaft & intermediate shaft assembly
l Rotate kick shaft & lock the ratchet gear below guide
kick.
l Place the kick return spring on kick shaft in such a
way that one end should be in the hole provided on
kick shaft.
l Place Nylon guide spring between kick shaft &
spring.
l Assemble circlip to lock the guide spring.
l Assemble other end of kick return spring into the
crankcase lug.
l Assemble kick lever on the kick shaft.
Crankcase Magneto Side :
l Assemble needle roller bearing with the help of
special tool P. No. 37 1005 04.
l Press magneto side oil seal with the help of special
tool P. No. 37 1030 61.(Inner driver f 20)
l Assemble guide kick with help of 2 screws.
31
l Assemble 2 no. of dowels on crankcase.
l Assemble the centre gasket on to the crankcase.
l Assemble crankcase clutch side on magneto side
taking studs as guide.
ENGINE ASSEMBLY :
l Take crankcase magneto side subassembly.
l Assemble the rubberised damper ring around the
crankshaft bearing seat area in crankcase magneto
side.
Crankcase assly.
Damper ring for crankshaft
l Assemble 'D' bolts alongwith plain & spring washers
and nuts.
l Also assemble plain, spring washers and nuts on
the crankcase studs.
l Tighten all the nuts in a criss-cross pattern to the
torque of 1.5 to 1.8 kgm.
l Assemble the crankshaft assembly into the bearing
seat of crankcase.
Note : Crankshaft assembly is slide / loose fit in
crankcase. If the crankshaft bearing is getting
tight in crankcase, slightly heat the bearing seat
by heater.
Nuts for crankcase
Assembly of crankshaft
l Assemble guide chain (slack side) with the help of
a special bolt and two plain washers on either side
of guide chain.
l Assemble the main shaft assembly in the needle
roller bearing by meshing it with intermediate shaft
gears.
Assembly of guide chain (slack side)
Assembly of mainshaft
32
l Put the spring inside the hole on crankshaft.
l Assemble parallel pin in the through hole provided
on the crankshaft arm.
l Assemble key (parallel) on the crankshaft key way
and fix primary spur gear (I/P) on it.
l Assemble springs on the hub clutch & plate the
holding plate on it. Assemble bolts on the holding
plate and tighten it in criss-cross pattern.
l Assemble collar & bearing on holding plate.
l Assemble 2 dowels on crankcase clutch side.
l Fix gasket for clutch cover.
l Assemble clutch cover on crankcase clutch side.
l Prefix 6 flanged bolts on clutch cover. Also prefix 4
nuts alongwith plain & spring washers on the studs.
l Tighten the flanged bolts & nuts in a criss-cross
pattern to the torque of 1.3 to 1.5 kgm.
l Prefix the special nut on the crankshaft.
l Hold the primary spur gear with the help of special
tool P. No. 37 1028 17 and tighten the special nut to
9 to 9.5 kgm torque.
Bolts & nuts for mounting clutch cover
l Assemble stator assembly on crankcase magneto
side by using 3 nos. of screw (pan cross), spring
washers & plain washers.
l Fix the grommet of the stator harness on crankcase
magneto side.
l Assemble woodruff key on the crankshaft.
l Assemble rotor on the crankshaft.
l Prefix the flanged nut alongwith spring washer.
l Hold the rotor by using special tool ( 37 1030 54)
and tighten the flange nut to 5.5 to 6 kgm.
Fitment of primary spur gear
l Assemble timing chain on crankshaft sprocket.
l Assemble the plunger in such a way that it fits into
the parallel pin fitted in the crankshaft arm.
l Assemble the spacer ,collar and clutch assembly
on intermediate shaft.
l Hold the hub clutch with the help of a special tool
P.No. 37 1031 52 and tighten the nut to the torque
of 9 to 9.5 kgm.
Fitment of magneto rotor
l Fix the fan on magneto rotor.
l Pull out the gear shifter stem and engage the cross
in 4th gear.
l Assemble gear shifter gasket on crankcase
magneto side.
l Engage lever of gear shifter in stem and taking
studs as guide, assemble the gear shifter.
Fitment of clutch assly.
33
l Prefix nut, plain washer & spring washer and tighten
them.
l Assemble larger O' ring for back plate and also
assemble 2 nos. of smaller rubber gaskets on
crankcase.
l Assemble back plate and fix 3 screws alongwith
spring washer.
l Assemble cam brake and 'O' ring on the crankcase.
l Assemble rear brake lever along with rear brake links
on cam brake.
l Fix the rear brake lever on cam brake with the help of
flanged bolt.
l Assemble brake shoes alongwith spring on the cam
brake and pivot pins.
l Assemble cam brake return spring on cam brake and
attach the other end of spring to crankcase magneto
side.
l Prefix 'O' ring on oil strainer nylon mesh.
l Assemble oil strainer on the crank case by holding
the lug provided on the strainer body with the help of
a nose plier.
l Assemble 2 dowels on crankcase. (One on clutch
side and the other on magneto side ) block sitting
area.
l Assemble gasket for cylinder block.
l Assemble piston assembly on connecting rod with
piston pin.
l Assemble circlips on both sides of piston pin.
l Apply slight amount of oil on piston skirt and rings.
l Positioning of rings on piston should be as follows:Top ring
Opening facing towards exhaust side
2nd ring
Opening facing towards inlet side
Oil expander
Opening facing towards inlet side
Top oil rail
30 0 left of exhaust side
Bottom oil rail 30 0 right of exhaust side
NOTE : Keep ' Top' marking on top and 2nd ring on
upper side. Keep 'IN' marking on piston top towards
intake side.
l Clean cylinder block and apply oil on liner bore and
assemble it on piston. Take out timing chain from the
tunnel provided on the crankcase. Check free
rotation of timing chain and motion of piston.
l Assemble guide chain through tunnel provided on the
cylinder block into the crankcase.
OIL
Assembly of oil strainer
Note :If the oil strainer is fitted in the reverse way i.e
lug on the strainer body goes inside then there will not
be any oil supply to oil pump.
l Assemble O' ring on the cap strainer.
l Assemble the cap strainer along with O' ring on the
crankcase.
l Assemble rear brake drum on mainshaft.
l Assemble washer and castle nut on mainshaft.
Tighten the castle nut. Fit the cap on castle nut and
lock it with split pin.
Assembly of cylinder block
l Assemble Head gasket.
l Assemble bush (oil seal) on cylinder block face (for
oil carrying stud).
l
Fitment of rear brake drum on mainshaft
Position of bush (oil seal) on cylinder head
34
l Put timing chain through tunnel on cylinder head and
hold on holder camshaft on cam shaft.
l Fix cylinder head with the help of special copper
plated washers and dome cap nut. Apply torque of
2.0 to 2.2 Kg.m. to dome cap nuts.
l Assemble two flanged bolts on cylinder head joining
cylinder head and cylinder block with crankcase.
l Assemble chain on timing sprocket and fix it with the
help of two bolts.
Keep piston at TDC position with the help of rotor and
marking provided on crankcase magneto side. Check
that the marking on timing chain sprocket matches
with marking provided on cylinder head.
l Assemble fan cover and cowling into the slots of
each other. Fix the fan cover and cowling screws.
l Assemble H.T. Coil alongwith its bracket on crankcase
magneto side with the help of two screws.
Assembly of cylinder head
l Position chain tensioner assembly into the bore
provided on cylinder block and fix it with the help of
2 flanged bolts.
l Release the tensioner bolt by 1 thread and tighten it
again.
l Align rotor marking with crankcase marking. Check
that marking on timing chain sprocket matches with
marking on cylinder head. Also check that both the
valves are in closed position by checking freeness of
tappets.
Set tappet clearance on intake valve with the help of
feeler gauge and tappet tightening tool. Lock the
tappet locking nut after setting tappet clearance to
0.8 to 1.2 mm.
Repeat the same procedure for exhaust valve keeping
tappet clearance 0.8 to 1.2 mm.
l Rotate rotor anticlockwise 3-4 times and check again
the tappet clearance by feeler gauge after aligning
markings as stated above.
l Fix 'O' ring on manifold and assemble it on crankcase
alongwith insulator. Fix 3 flanged bolts.
l Assemble 'O' ring on camshaft cover and fix it on
cylinder head. Align the holes of cover with cylinder
head and fix two flanged bolts.
l Assemble 'O' ring on cap for intake and exhaust
valves. Fix the caps on respective position on
cylinder head and tighten it to the torque of 0.5 to 0.9
kg.m.
l Prefix spark plug by hand and tighten it to the torque
2.5 to 3 kg.m.
35
SERVICE DATA (ENGINE)
SR.NO.
1
2
DESCRIPTION
STANDARD
CARBURETTOR :
Make & Type
Keihin PB20
Main jet
108
Main air jet
90
Pilot jet
42
Jet needle
OB 4
Jet needle clip position
3rd from top
Float height
10.7 mm
Air screw setting
(From fully closed position)
2.25 ± 0.25 turns
CYLINDER HEAD :
Cylinder head warp
0.03 mm
3
COMPRESSION PRESSURE
12 ±1 kg / cm2
4
VALVES
5
6
REMARK
Tappet clearance (In. & Exh.) engine cold
0.08 -0.12 mm
Valve(Inlet) head thickness
0.7 ± 0.15 mm
Valve(Exhaust) head thickness
1.0 ± 0.15 mm
Valve (Inlet) stem diameter
5.45 - 5.51 mm
Valve (Exhaust) stem diameter
5.45 - 5.48 mm
Valve (Exhaust) guide inside diameter
5.520 - 5.532 mm
Valve spring free length
37.5 mm
CAM & ROCKER :
Rocker arm inside diameter
10.015 mm
Rocker shaft diameter
9.975 - 9.990 mm
Cam height (Inlet)
30.81 mm
Cam height (Exhaust)
30.44 mm
CAMSHAFT CHAIN LENGTH (20 Links)
127.00 - 127.48 mm
36
0.003" to 0.005"
SERVICE DATA (ENGINE)
SR.NO.
7
8
DESCRIPTION
STANDARD
CYLINDER / PISTON GROUPING
Cylinder bore
REMARK
57.000 - 57.015 mm
Piston diameter.
56.979 - 56.995 mm
bottom.
Measure at 7 mm from
Cylinder / Piston clearance
0.010 - 0.029 mm
Use Cylinder & Piston of
same group .
PISTON RING
Piston ring groove thickness
a) Top ring
1.0 mm
b) Second ring
1.0 mm
c) Oil
2.0 mm
Piston ring thickness
a) Top ring
1.0 mm
b) Second ring
1.0 mm
Piston ring end gap
a) Top ring
0.2 -0.45 mm
b) Second ring
0.2 -0.45 mm
Piston ring gap position
Top ring - Towards Exhaust side
Second ring - Towards Inlet side
Top oil rail - 300 left of Exhaust side
Oil expander - Towards Inlet side
Bottom oil rail - 300 right of Exhaust side
9
CRANKSHAFT RUNOUT
0.02 mm
10
CONNECTING ROD BIG END PLAY (Axial)
0.15 - 0.35 mm
11
CLUTCH ASSLY. :
Friction plate thickness
3.1 - 3.3 mm
Pressure plate thickness
1.25 mm
Clutch spring free length
25.5 ± 0.3 mm
37
DISMANTLING AND ASSEMBLY : CHASSIS
REMOVAL OF 'T' NOSE
REMOVAL OF LUGGAGE BOX
A) Removal of 'T' Nose assly. from chassis :
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Open Luggage box door.
Remove 2 square grommets on the side walls of
the Luggage box and 2 round grommets on the
front face of luggage box.
Remove 2 screws each from both side attaching
Nose with chassis from square holes provided on
the both side walls of Luggage box.
Remove 1 screw each from the round holes provided
on the front face of Luggage box.
Remove 2 screws provided on the top of Luggage
box.
Take out 'T 'Nose after disconnecting horn, deeper,
flasher and AC/DC Unit cables.
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Open Luggage box door.
Remove 2 screws provided on the topmost portion
of Luggage box.
Remove 2 Nuts from the door opening.
Remove 2 screws provided on the lowermost
portion of Luggage box and take out Luggage box
assembly.
Mounting screws for Luggage box
REMOVAL OF HANDLE BAR COVERS :
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Remove 2 screws on handle bar rear cover holding
handle bar front cover.
Remove one screw provided on handle bar front
cover just below Head Light adjustment screw.
Mounting screws for 'T' Nose
B) Dismantling of 'T' Nose assly.
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Remove 2 screws mounting Grill on 'T' Nose.
Remove 2 screws mounting LH blinker and slide out
blinker assly from nose .
Similarly dismantle RH blinker.
Remove 4 bolts for Beeper/Flasher mounting bracket
and horn.
Take out horn.
Remove 2 screws for beeper and separate it from
bracket.
FLASH
A) Screws on rear cover
Dismantling of 'T' Nose
A) Screw on front cover
38
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Carefully disengage the locking lugs of handle bar
front cover by prying with the help of a small screw
driver.
Take out Handle bar front cover.
Disconnect Head lamp harness coupler and
remove handle bar front cover.
Remove both mirror by removing packing and hex
socket bolts.
Disconnect L.H. and R.H. Switch couplers near
steering column lower mounting race.
Remove 2 screws mounting Handle bar rear cover
on handle bar (from front side)
Remove 1 screw mounting handle bar rear cover
from back side.
Remove speedometer cable connection and
harness connection.
Take out Handle bar rear cover.
b
a
a
Dismantling of Handle bar cover front
a) Screw for mounting head lamp
b) Lock washer for fairing
DISMANTLING OF HANDLE BAR COVER REAR :
REMOVAL OF HANDLE BAR :
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A) Removal of handle bar from steering column :
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Remove 2 spring (clip) nuts from cover.
Remove 2 screws for mounting LH switch on cover
and take out LH switch from the window provided
on cover.
Remove 2 screws for mounting RH switch on cover
and take out RH switch from the window provided
on cover.
Remove 5 screws alongwith plain washer for
mounting instrument panel and take out
instrument panel.
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Dismantling of Handle bar cover rear
a) Screw for switches
b) Screw for instrument panel
Handle bar mounting bolt
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DISMANTLING OF HANDLE BAR COVER FRONT :
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Remove Handle bar front cover and rear cover.
Disconnect front brake cable from wheel end.
Take out front brake cable from RH lever.
Disconnect both Gear cables from gear shifter end
and also disconnect them from Gear control link.
Disconnect throttle & Choke cable from carburettor
end and from Gas control link.
Disconnect front brake switch connections.
Disconnect sensor connections.
Remove handle bar mounting bolt.
Remove 2 spring (clip) nuts from cover.
Remove 2 screws for mounting Head lamp
mounting brackets.
Screw In the Head lamp beam adjustment screw
and take it out from the inner side of cover.
Remove 3 lock washers of fairing carefully and
take out fairing.
Lift handle bar from steering column.
Disconnect Gear cables and Throttle cable by
slipping nylock provided on cable outers from handle
bar body and take out Handle Bar.
b) Dismantling of handle bar
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l
l
l
39
Remove 3 spring nuts on cover mounting brackets.
Remove 2 screws to take out sensor assly from
handle bar.
Take out 2 bolts alongwith spring washer for
mounting cover mounting bracket
Remove both handgrips.
l
l
l
Remove spring clip holding gas control pulley and
take out gas control pulley. Pull out gas control tube.
Remove spring clip holding gear control link and take
out gear control link. Remove plain and special
washer. Pull out gear control tube assly.
Take out silent bushes from handle bar LH and RH
tubes with the help of a suitable tube or 'L' tommy.
l
a
REMOVAL OF TAIL PIECE ASSLY :
l
Remove 2 nuts mounting hook for seat lock alongwith
spring washers.
Remove 3 screw pan cross (self tapping) alongwith
plain washer for fixing rear number plate.
b
c
Removal of dual seat
a) Bolts for seat hinge
c) Coupler
REMOVAL OF SEAT LOCK MECHANISM :
a
a) Screws for rear number plate
l
b) Split pin
a)
Removal of seat lock mechanism from carrier
plate assly.
l
l
Unlock seat lock with key and lift the seat.
Disconnect seat lock cable from seat lock & seat
lock mechanism.
Remove 2 bolts mounting the seat lock mechanism
and bracket seat lock alongwith plain & spring
washers.
Take out seat lock mechanism and bracket seat
lock.
Remove screw mounting cable seat lock alongwith
spring washer and take out cable.
l
Remove 3 screws mounting tail piece on chassis
alongwith plain washer, spring washer and nut.
l
l
REMOVAL OF CARRIER PLATE :
l
a
l
l
After Removal of seat lock mechanism.Remove
3 bolts mounting carrier plate on chassis.
Remove 2 nuts mounting carrier plate on Grab handle
alongwith plain & spring washers.
Take out carrier plate.
b
a) Screws for tail piece
REMOVAL OF DUAL SEAT :
a) Removal of dual seat from chassis
l Unlock seat lock with key and lift the seat.
l Disconnect fuel gauge coupler.
l Remove 3 bolts mounting the seat hinge on chassis
alongwith spring washers.
l Remove the clip holding harness from fuel gauge
tank unit.
l Take out seat assly with hinge.
a
Removal of carrier plate
a) Bolts for mounting carrier plate.
b) Nuts for mounting carrier plate on grab handle.
b) Dismantling of dual seat .
l Remove 2 nuts mounting the hinge bracket on seat
alongwith spring washers.
l Remove split pin ,plain washer and remove pin
holding hinge bracket with seat hinge.
40
REMOVAL OF PETROL TANK
a) Removal of petrol tank from chassis
l
l
l
l
c
Removal of seat hinge with dual seat & carrier plate
with seat lock:
Disconnect coupler joining fuel gauge tank unit with
main wiring harness.
Lift the fuel tank and remove vaccum pipe & fuel pipe
alongwith clips from fuel cock assly.
Take out fuel tank with fuel cock assly. & gasket .
a
b
Seat hinge
Carrier plate
a) Screws for lens
b) Screws for bottom piece
c) Screws for reflex reflector
l
Fuel gauge
coupler
l
Remove 2 screws of tail light reflector and take out
tail light reflector.
Remove clip for seat lock with barrel and take out
seat lock with barrel.
Removal of petrol tank
b
b) Dismantling of petrol tank
l
l
l
Remove all the fuel from the tank.
Remove 4 special bolts for mounting fuel gauge tank
unit. and take it out carefully without damaging float
and float lever alongwith rubber gasket.
Loosen the two mounting bolts and take out fuel cock
assly, from bottom of the tank.
a
a
REMOVAL OF GRAB HANDLE :
a) Screws for reflector
b) Clip for seat lock
A) Removal of grab handle from chassis:
l
l
l
l
SPARE WHEEL BRACKET REMOVAL
Open seat lock and lift the seat.
Release seat lock cable.
Remove 2 nuts of plate grab handle located inner side
chassis below tail lamp.
Remove 2 nuts attaching grab handle with carrier
plate. Take out grab handle assly.
l
l
l
l
l
B) Dismantling of grab handle:
l
l
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l
Remove 2 screws for tail lamp lens.
Remove tail lamp & rear side indicator lens.
Remove 2 screws of bottom piece grab handle.
Remove 2 screws of reflex reflector.
Take out LH bonnet.
Remove spare Wheel cover & spare wheel.
Remove screw pan cross mounting voltage regulator
on spare wheel bracket and disconnect the terminals.
Remove 4 bolts take out footrest.
Remove 5 bolts mounting sp. wheel bracket on
chassis and take out spare wheel bracket.
a
a
a) Bolts for removal of spare wheel
41
REMOVAL OF AIR FILTER BOX
l
l
l
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l
Remove spare wheel.
Take out Air Filter element.
Remove Dual seat hinge, carrier plate.
Take out fuel tank.
Remove flange bolts of Air filter from engine bonnet
side.
Slide out outlet of air filter from the hole on chassis
and take out Air Filter box.
a
t
an
id
ive
b
REMOVAL OF STEERING LOCK
l
l
l
Remove 'T' nose.
Remove screw for ignition switch and take out
ignition switch.
Remove screw for lock cam. Ensure that key is
either in 'ON' or 'OFF' position and remove lock cam
with nose plier. Otherwise lock cam will not come
out and may be damaged.
Removal of Antidive cover
a) Screws
l
a
b) Antidive cover
Remove front brake drum nylock nut and take out
front brake drum.
a
b
b
a) Screw for ignition switch
l
Removal of Front brake drum
a) Nylock nut
b) Front brake drum
b) Screw for lock cam
Press the lug of lock and pull the lock barrel assly.
with key. Ensure that spring plate will not fall down.
l
Remove snap pin and then remove bolt connecting
link of steering column.
REMOVAL & DISMANTLING OF STEERING COLUMN
l
l
Remove handle bar covers and handle bar as
explained.
Disconnect speedo cable and front brake cable .
b
a
a
Removal of Snap pin (a) for Antidive link
Removal of Speedo cable & Front brake cable
a) Speedometer cable
b) Front brake cable
l
l
Remove front wheel.
Remove mudguard side cover screws and take out
antidive cover .
42
l
Remove circlip holding front brake panel on front
axle and then remove front brake panel .
a
a
b
Removal of Lock plate (a)
l
Removal of Circlip for removing Front brake panel
a) Circlip
b) Washer
l
l
l
Remove front shock absorber upper mounting
bracket by removing 2 nuts .
l
Tilt the scooter on one side and take out the steering
column carefully from the bottom side.
Give suitable support below floor board of chassis.
Using puller (P.No. 37180103) remove lower bearing race from fork. Remove top bearing race by
special tool (P.No.37180506).
Remove the front mudguard by removing two bolts.
a
Removal of Upper bracket (a) for Fr. shock absorber
l
Removal of Front mudguard
Remove front shock absorber lower end bolt and
then take out front shock absorber .
l
Remove grease nipple provided at cross tube of
steering column.
FRONT BRAKE DRUM DISMANTLING:
l
Remove speedometer gear and spacer from front
brake drum by using Extractor ( P. No. 37151905)
which is to be used along with 37100114.
a
Removal of Front shock absorber lower bolt (a)
l
l
l
Remove hub pin locking plate bolt and lock plate .
Remove hub pin alongwith shoulder washer and
take out front hub .
Using hook spanner (P.No. 37180101) unscrew
lock nut and upper bearing race. Take care to hold
steering column to avoid it from falling down.
Remove upper and lower steering ball cage.
Removal of Speedometer gear
43
l
l
Remove the needle roller bearing from the Brake
drum by using Extractor (P. No. 371703 05) without
its cup but with the tool (P. No. 371819 04).
While fitting Speedometer gear and Spacer on
Front brake drum use Special Tool - Outer driver (P.
No. 37 1519 04). Metallic portion of Speedometer
should face downward while assembling.This tool
consists of three parts i.e. a punch, a socket head
screw and a locating plug.
Removal of Needle roller bearing
l
Remove the Circlip locking ball bearing from Front
brake drum. Tap out ball bearing with the help of
suitable punch.
Assembling of Speedometer gear and Spacer
FRONT BRAKE DRUM ASSEMBLY:
l
FRONT BRAKE PANEL DISMANTLING:
Fit the ball bearing on Front brake drum by using
suitable outer driver from bearing driver set (P.No.
37103061) and inner driver (P.No. 37101413).
l
Remove bolt connecting the antidive link with front
brake panel.
a
Assembling of Ball bearing
Removal of Antidive link (a)
l
l
l
l
Fit Circlip, locking ball bearing.
Use suitable punch from bearing driver set for fitting
Needle roller bearing in Front brake drum assembly,
l
l
Remove spring lock and then remove brake shoe.
Remove actuating lever along with indicator and
‘0’ ring by removing bolt and nut .
Remove actuating shaft .
Remove needle roller bearing by using suitable
punch from bearing driver set (P. No. 371030 61).
DISMANTLING OF ANTIDIVE LINK AFTER
REMOVING FROM FRONT BRAKE PANEL:
l
l
Assembling of Needle roller bearing
44
Remove grease nipples .
Remove ‘O’ rings , small bushes and using suitable
punch from bearing driver set (P.No. 371030 61),
remove big bushes .
l
Using suitable punch from bearing driver set punch
Grease seal into Front brake panel.
a
Removal of Big bushes (a) of Antidive kink
ANTIDIVE LINK ASSEMBLY:
l
Assembly of Grease seal
Assemble ‘L’ type grease nipple at one end of link
and other type of grease nipple at other end of link
as shown in sketch.
l
l
l
Assemble grease nipple
(P.No.35 1710 33) on this hole
Assemble Grease nipple on Front brake panel.
Insert Front brake Actuating shaft assly into Front
brake panel.
Assemble ‘O’ ring & Indicator into Actuating shaft
and fit Actuating lever into Actuating shaft by Bolt
& Nut.
a
Assemble grease nipple
(P.No.23 1613 05) on this hole
Link assly.
l
Press big bushes using suitable punch from bearing
driver set (P.No. 37103061) and then assemble
small bushes, ‘O’ rings and cup washers on link.
Assembly of Actuating lever (a)
l
FRONT BRAKE PANEL ASSEMBLY:
l
Using suitable punch from bearing driver set (P.
No.37 1030 61) punch Needle roller bearings into
Front Brake panel . Apply grease to Needle roller
bearings.
l
Facing paint mark upward, assemble Front brake
shoe into Front brake panel. Fit spring lock. This is
done to have proper positioning of Leading and
Trailing Brake shoe.
Assemble Speedometer pinion alongwith support
into Front brake panel with screw. ‘O’ ring should be
fixed on support.
Screw for
speedometer holder
Refitting of Needle roller bearing
Assembly of Speedometer holder
45
l
l
l
Assemble Front brake cable adjuster into Front
brake panel.
Assemble Brake links on Actuating lever by Split
pin.
Assemble antidive link end having ‘L’ type grease
nipple on brake panel by bolt alongwith flexible
washer . It should be assembled such that it should
have easy access while greasing.
REMOVAL OF ENGINE FROM VEHICLE :
l Put the vehicle on the stand , open seat lock & lift
seat and remove both LH and RH bonnets.
l Drain Engine oil completely by removing drain plug.
l Disconnect lower ends of rear brake & clutch cable.
l Remove gear shifter cover and release lower ends
of gear cables by unscrewing screw terminals.
l Disconnect magneto harness coupler from main
harness. Also remove body earthing screw on fan
cover & remove earthing cable.
l Disconnect choke and throttle cable from carburettor.
l Disconnect duct from carburettor. Disconnect
carburettor from intake manifold. Disconnect fuel
pipe and sensing pipe.
l Remove bolt fixing lower end of rear shock
absorber to the engine.
l Hold engine carefully & remove the bolt fixing
c,case arm with engine mounting link on chassis.
l Take out the engine carefully from the chassis.
a
CHASSIS ASSEMBLY
Assembly of Brake links (a)
l
DISMANTLING OF FRONT SHOCK ABSORBER
l
l
l
Remove two nuts (c) holding Front shock absorber
upper mounting bracket .
Remove the Shock pads & Pad locators.
Remove nut holding spring and then remove front
suspension spring .
l
l
l
FRONT SHOCK ABSORBER ASSEMBLY:
l
l
l
l
Assemble front suspension spring on front shock
absorber such that its lower pitch side face downwards and then tighten the nut.
Assemble shock pads & pad locators on front shock
absorber and then tighten with the nuts.
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l
Nut 'C'
l
Pad locator
Shock pad
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Assembly of Front shock absorber
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46
Assemble various grommets on chassis in respective
holes i.e. grommets for petrol pipes, tail lamp,
control cables etc.
Fix plug for bonnet on LH and RH side of chassis.
Insert 2 bolts alongwith plain washer from front side
of shield in the holes for L. box Fit plain washer,
spring washer and on each bolt and tighten it.
Pre-fit shield beading on shield on the shield by light
hammering by rubber mallet
Press fit the beading by using special tool.
Insert 4 bolts for stand mounting and Position stand
on chassis and insert stand clip LH and RH on the
bolts. Prefix 4 nuts spring washers and tighten
them.
Assemble hook plate on chassis and assemble
stand spring.
Insert wiring harness into the chassis from front side
(Near steering hsg. side)
Take out the harness branches for LH and RH
control switches, head lamp and instrument panel
from the cavity of the chassis.
Take out harness branch for brake switch from the
hole on chassis near brake pedal mounting.
Insert tail lamp wiring harness through diaphragm
hole. Route the harness along LH side of diaphragm
and take it out from hole on rear end of chassis.
Take out harness branch for regulator and CDI unit
through hole on LH side of chassis.
Take out harness branch for stator from hole on RH
side of chassis.
Align hook with chassis holes and fix it with 2 Nos of
screws alongwith plain, spring washers and nuts.
Insert control cables i.e. Accelerator cable, Gear
cables and choke cables from upper terminal in
proper position.
Fix cap for upper terminal.
Assemble handle for Engine bonnet and LH bonnet
with spring, plain washer and nylock nut on LH and
RH side of chassis.
SERVICE DATA (CHASSIS)
SR.NO.
1
2
DESCRIPTION
STANDARD
WHEEL RIM RUN-OUT:
Axial
0.5 mm
Service limit : 2.0 mm
Radial
0.5 mm
Service limit : 2.0 mm
150.16 mm
Service limit : 151.00 mm
130.16 mm
Service limit : 131.00 mm
4.03 mm
Service limit : 2.5 mm
4.03 mm
Service limit : 2.5 mm
BRAKE DRUM INSIDE DIAMETER:
Front
Rear
3
BRAKE SHOE LINING THICKNESS
Front
Rear
4
5
6
7
BRAKE ACTUATING SHAFT DIAMETER :
Front
12.925-12.968 mm
Rear
11.957-11.984 mm
BRAKE ACTUATING SHAFT HOLE DIAMETER :
Front
13.043 mm
Rear
12.027 mm
BRAKE SHOE SPRING FREE LENGTH :
Front
44.00 - 46.00 mm
Rear
31.50 - 33.50 mm
TIRE PRESSURE
Front
1.25 kg/cm2 (18 PSI)
1.75 kg/cm2 (25 PSI)
2.50 kg/cm2 (36 PSI)
Rear (Without pillion)
Rear (With pillion)
8
REMARK
FREE PLAY
Clutch lever play
Front brake lever play
3.0 - 5.0 mm
3.0 - 5.0 mm
Rear brake pedal play
10.0 -15.0 mm
47
ELECTRICALS : MAINTENANCE & CHECKING
GENERAL PRECAUTIONS :
THROTTLE REGULATED
CONTROL SYSTEM (TRICS)
There are some important precautions to be taken
while servicing electrical system. Please follow them.
In 'TRICS', Ignition timing varies as per throttle opening.
Below half throttle, ignition timing changes from 160 to 300
in proportion to engine rpm. Refer graph1.
Code
Colour
B
Black
Br
Brown
G
Green
Gr
Grey
L
Blue
Lg
Light Green
O
Orange
R
Red
W
White
Y
Yellow
B/Y
Black/Yellow
R/W
Red/White
L/W
Blue/White
W/G
White/Green
Y/R
Yellow/Red
B/W
Black/White
W/R
White/Red
R/B
Red/Black
R/Y
Red/Yellow
IGNITION TIMING k
l Do not reverse the battery lead connections. This will
burn out the diodes in the electrical parts.
l Always check battery condition before condemning
other parts of an electrical system. A fully charged
battery is a must for conducting accurate electrical
system tests.
l The electrical parts should never be struck sharply,
as with a hammer, or allowed to fall on a hard surface.
Such a shock to the parts can damage them.
l To prevent damage to electrical parts, do not disconnect the battery leads or any other electrical
connections when the ignition switch is on, or the
engine is running.
l Do not use a meter illumination bulb rated for other
than the voltage or wattage specified in the wiring
diagram, as the meter or gauge panel could be
warped by excessive heat radiated from the bulb.
l Take care not to short the leads that are directly
connected to the battery positive (+) terminal to the
chassis ground.
l Never replace a defective part without determining
what CAUSED the failure. If the failure was caused
by some other item or items, they too must be
repaired or replaced, or the new replacement will
soon fail again .
l Make sure all connectors in the circuit are clean and
tight, and examine wires for signs of burning, fraying,
etc. Poor wires and bad connections will affect
electrical system operation.
l Measure coil and winding resistance when the part is
at room temperature.
l Colour codes :
Code Colour
IGNITION
40
30
20
16
10
1000
2000
3000
RPM k
4000
IGNITION TIMING BELOW HALF THROTTLE
IGNITION TIMING k
After half throttle ignition timing changes to 16 0
irrespective of engine rpm. Refer graph 2.
40
30
20
16
10
RPM k
IGNITION TIMING AFTER HALF THROTTLE
Details of modifications in various parts are as under.
A)
Throttle sensor : Throttle sensor is provided in
Handle bar. A signal is passed to C.D.I.Unit with the
help of this sensor as per position of throttle.
B) Gas control link : Gas control link is modified .
48
B) FRONT & REAR BRAKE SWITCHES :
CHECKING PROCEDURES
Disconnect the two terminals of the front or rear brake
switch and connect an ohmmeter between the two terminals
setting it on x 10 ohms range. When the switch is pressed
the ohmmeter should show infinity ( ) and when switch
is released the ohmmeter should show 0 ohms.
If not showing above readings replace brake switch.
A) CONTROL SWITCHES
Control switch LH
a) Dipper Switch (When Head light is ON)
Position
Colour
Range
Brown/ Blue
Yellow/Red
l
l
Hi
l
Low
Connection
Violet
x10
ohms
l
b) Horn Switch
Switch position Reading
Red
Switch pressed
Blue
Switch released
0 ohms
C) STEERING CUM IGNITION SWITCH
Position
Connect the +ve meter lead to Red cable and -ve meter
lead to Black cable. Check continuity (0 ohms) as given
below:
Colour
Black
White
ON (Pressed)
l
l
OFF
l
l
Switch position
Control switch RH
a) Side Indicator Switch
Position
Colour
Black/ Violet
Yellow
Red/
White
Red
Ignition OFF
(steering lock)
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l
Ignition OFF
(steering unlock)
l
l
l
l
Ignition ON
(steering unlock)
l
l
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l
Green/White
Grey/Red
Blue/White
RH
l
l
l
D) H.T. COIL
N
l
l
l
LH
l
l
l
To measure the H.T.Coil resistance on the vehicle, remove
the spark plug cap from spark plug lead and test as per
table. Take both reading i.e. primary and secondary with
respect to ground.
b) Start Button
Meter
Position
Colour
Red
Red/Yellow
ON (Pressed)
l
l
OFF
l
l
Reading
Primarywinding
x 1 ohms
0.9 to 1.1 ohms
Secondarywinding
x 1 k ohms
6.5 to 7.5 K ohms
E) COILS ON STATOR PLATE ASSLY
Use the Hand Tester (37 1030 63) for checking the
resistance across the coils.
1) Lighting Coil
First connect the + ve meter lead to Green cable and - ve
meter lead to Black (earth). The resistance value should
be as tabulated below.:
Range
x1 ohms
49
Connection
Reading
Meter +ve
Meter -ve
Green
Black
0.5 to 0.8 ohms
2) Charging Coil
G) BATTERY CHARGING SYSTEM
First connect the + ve meter lead to Violet cable and
- ve meter lead to Black (earth). The resistance value
should be as tabulated below.:
l Ensure that battery is fully charged.
l Set meter range at 20 A DC
l Remove fuse & connect meter +ve lead to other
terminal of fuse i.e. Red / White wire coming from
DC Regulator and meter - ve lead to Red wire coming
from battery +ve terminal.
l All DC load viz. Brake lights and Side indicator bulbs
are to be switched OFF.
l Start the Engine. Set the Engine RPM at 3500 RPM.
l Measure Battery charging current. It should be 1.0 to
3.0 amps i.e. current must flow into the Battery.
Range
Connection
Meter +ve
x10ohms
Reading
Meter -ve
Violet
Black
245 to 295ohms
3) Pulser Coil
First connect the + ve meter lead to Grey cable and - ve
meter lead to Black (earth). The resistance value should
be as tabulated below.:
Range
Connection
Meter+ve
x10 ohms
Meter -ve
Grey
Black
108 to 132ohms
First connect the + ve meter lead to Orange cable and ve meter lead to Blue/Red. The resistance value should
be as tabulated below.:
Connection
Meter +ve
x10ohms Yellow
Connection
Meter +ve
Meter -ve
20A DC
Red/White
Reading
Meter -ve
Yellow/Red
0.65 to 0.95 ohms
5) Insulation Check (ForLighting,Horn,Battery
Charging coils & Charging coils) : To check
Range
whether coil is body short
Note : Disconnect wire connected to earth for lighting &
charging coil before conducting insulation check.
25V DC
Range
x1K
ohms
Connection
Meter-ve
Core
(Removevarnish
from core to have
propercontact
Either one >200 K ohms
ofterminal
l Connect +ve lead of meter to +ve terminal of Battery
and - ve terminal of meter to - ve terminal of Battery.
l Ensure that all lights are off.
l Start the Engine, set it at 3500 RPM .
l Measure the Battery terminal voltage.
READING AT 4500 RPM
OFF
DC 25 V
14.7 ±1V
Meter +ve
Meter -ve
Battery +ve
Battery +ve
Reading
14.7±1 V
Remove the flasher unit which is to be checked and
connect it to another vehicle whose flasher unit and side
indicators are working properly. Check that the terminals
are connected correctly. Start the vehicle and put ON the
indicator switch and see if the flasher unit functions or not.
If flasher unit works properly then there may be some
problem with the switch or regulator or with the wiring of
the vehicle whose flasher unit is being checked.
DC Voltage Measurement :
METER
Connection
H) TURN SIGNAL RELAY
F) DC VOLTAGE REGULATOR
LOAD
1.0 to 3.0A
Note : Use fully charged Battery ( specific gravity of
electrolyte = 1.24)
Reading
Meter+ve
Red
Reading
l Stop the Engine. Disconnect the meter and reconnect
the fuse.
l As a further check, set meter range at 25 V DC.
l Connect +ve lead of meter to +ve terminals of Battery
and - ve terminal of meter to - ve terminal of Battery.
l Ensure that all lights are off.
l Start the Engine.
l As the RPM of engine increases, voltage will also
increase. Measure the Battery terminal voltage at
3500 RPM.
4) Battery Charging Coil
Range
Range
Reading
Also check flash rate (No.of flashes/min). If flash rate is
not within the specified limit i.e.90 ±30 flashes / min,
replace it as it is faulty.
If right or left signal gets ON, check that the blinker bulbs
are Ok.
I) FUEL LEVEL GAUGE (TANK UNIT)
For knowing the quantity of fuel inside the fuel tank at a
glance, fuel gauge is provided on an instrument panel. The
fuel gauge works on the principle of 'variable resistance'.
The fuel gauge works on A.C. supply.
The fuel gauge consists of a float for level sensing, a
sender for sending the signal and the gauge for converting
Note : Use fully charged Battery ( specific gravity of
electrolyte = 1.24)
50
the signals from sender into the movement of needle.
Checking of Fuel Tank Unit:
Connection
Tank (float)
Reading
White/Black
Fuel(Full)
(Highest position)
1.0 to 5.0
ohms
Fuel(Empty)
(Lowest position)
103to117
ohms
Meterx10ohms
Black
J) DC Voltage Measurement :
l Connect +ve lead of meter to Orange wire and -ve lead
of meter to Orange/Brown wire from AC/DC unit.
- Start the engine and set it at 3500 rpm.
- Press the Horn button.
- Measure the DC Voltage at 3500 rpm.
Range
25V DC
Connection
Meter +ve
Meter -ve
Orange
Orange/Brown
Reading
9 to13 V
K) DC HORN
1) Tuning of DC Horn :
l Check the Horn sound. If it is weak or feeble, loose the
check nut provided at the back of Horn.
l With the help of screw driver, rotate the screw till the
horn sound is good.
l After proper tune up, hold the screw & lock the
checknut .
2) DC Current Measurement :
l Remove the Orange wire from Horn & connect one lead
of meter to Orange wire and other lead of meter to horn
terminal from which Orange wire is removed.
- Start the engine and set it at 3500 rpm.
- Press the Horn button.
- Measure the Current at 3500 rpm.
Range
20A DC
Connection
Reading
Meter +ve
Meter -ve
Orange
Horn Terminal 1.5 A max.
L) SPARK PLUG CAP (RESISTIVE)
l Remove H.T. cable from Spark plug cap.
l Connect +ve lead of meter to Spark plug cap where
H.T. cable is connected and -ve lead of meter inside
cap where spark plug is fitted.
l Measure the resistance across the spark plug cap.
Range
x1K
ohms
Connection
Meter +ve
Meter -ve
Where
H.T. cable
is connected
Where
Spark plug
is fitted
Reading
4.0 to 6.5 K
ohms
51
M) C.D.I. UNIT (With 'TRICS' )
METER
RANGE
X 10 W
9
8
1
2
6
7
3
4
METER NEGATIVE (-VE) LEAD CONNECTION
1
1
2
3
4
6
7
8
9
×
×
40 ~ 60 W
×
×
×
0
40 ~ 60 W
×
×
×
×
250 ~ 400 W
250 ~ 400 W
×
×
×
40 ~ 60 W
×
×
×
×
×
×
×
×
×
2
250 ~ 400 W
3
40 ~ 60 W
×
4
×
×
×
6
×
×
×
×
7
×
×
×
×
×
8
×
×
×
×
×
×
9
0
×
×
40 ~ 60 W
×
×
METER
POSITIVE
(+VE) LEAD
CONNECTION
52
×
×
CHECKING PROCEDURE FOR SELF STARTER
On vehicles with button start, a 12V motor is used to
crank the engine instead of a kick, when button is
pressed.
Thus with ignition switch in ON position, vehicle in
neutral gear; the current flows through relay when
starter button is pressed.
The starter motor draws it current from a 12V - 9 AH
battery through a relay (solenoid switch).
Starter motor is energised which engages the pinion
to ring gear on flywheel and the starting shock is
absorbed by spring.
The solenoid switch (relay) is energized by pressing
starter button (Vehicle should be in neutral gear ).
When the relay gets energized it connects battery to
starter motor.
Upon engaging the ring gear rotates with magneto
rotor and engine starts.
Once the engine starts, ring gear rpm becomes more
than the pinion and pinion is forced back to its rest
position.
The supply of current to starter button is routed through
ignition switch. Hence the motor will run only when
the ignition switch is ON.
A battery charging coil on stator plate supplies A.C.
charging current to regulator. It converts it into D.C.
and charges the battery continuously when engine is
running. A 10 Amp fuse is provided for safety.
54
BATTERY
Hydrometer
TECHNICAL SPECIFICATION :
Make, voltage & type
: Exide,12V MX 9-B
Capacity
: 9 AH
Specific gravity of electrolyte
for initial filling of new battery
: 1.24 for use above
10°C
Specific gravity of electrolyte
for initial filling of new battery
: 1.28 for use below
10°C
Electrolyte volume
: 0.50 litres
Initial charging duration
: 8 ~ 12 hrs
Initial charging current
: 0.9 to 1.0 A
Read here
Checking battery specific gravity
After charging is over, fit the filling caps, Wash acid
spillage with water. Dry the battery. Ensure terminals
are clean. Install the battery on vehicle as described
below:-
INITIAL CHARGING PROCEDURE :
1)
2)
3)
Pull of the short plastic tube on the exhaust vent
outlet and replace it with the long open tube provided
with battery.
Do not crimp or bend the exhaust tube. This is a
safety device to remove fumes. Blockage of this
tube is liable to cause an explosion.
Fill each cell with dilute sulfuric acid of the correct
specific gravity (1.24 at room temp. for use above
10°C and 1.28 at room temp. for use below 10°C).
4)
Allow the battery after filling to stand for half an
hour.
5)
Keep vent plugs open. Connect battery to charger
(P.No. 37 20 3102) and charge at 0.9.
6)
Charge continuously for 8 to 12 hours taking specific
gravity readings every hour. Fully charged condition
is indicated when all cells are gassing freely and
evenly and show no rise in specific gravity over 3
successive readings.
7)
BATTERY INSTALLATION :
After charging push vent plugs firmly into place
and wash off acid spillage with water and dry the
battery.
CHECKING THE SPECIFIC GRAVITY :
The charge condition of the individual cell can be
checked by measuring specific gravity of electrolyte in
that cell. The specific gravity of electrolyte can be
checked by using Hydrometer having small diameter
spout. Such a Hydrometer is available in Spare Part
Dept. or can be directly procured from market .
a)
Ensure that in all six cells the level of electrolyte
is near the maximum level mark.
b)
To clean & dry the surface wipe the top of the
battery with a clean cloth. Install the battery on its
rubber seat. Fasten the battery firmly with the band.
c)
Connect cables to the positive and negative
terminals properly. Reverse connections will
damage the charging system permanently since
the DC Regulator may get damaged due to
excessive current in the reverse direction.
d)
Always connect the “negative (earthing) terminal
Iast”.
e)
Clean the battery terminals and cable connections.
Smear them with petroleum jelly to avoid corrosion
(NEVER USE ORDINARY GREASE) .
f)
Route the battery exhaust tube properly. Do not
fold or crimp as it may cause explosion of the
battery.
g)
Check that the battery cables connections are firm
and cables do not rub against any metal
components.
For measuring the specific gravity bring the electrolyte
in the Hydrometer to eye level, and read the graduations on the float scale bordering on the lower meniscus
(i.e. curved down portion of electrolyte surface) as shown
in the figure.
B
C
A
Specific gravity of fully charged Battery, at 270C (Room
Temperature)
: 1.23 to 1.24 in Tropical climate
: 1.27 to 1.28 in Cold climate
Electrolyte level inspection
A - Battery B - Upper level C - Lower level
55
BATTERY MAINTENANCE :
exposed surfaces will harden and will become
sulphated.
d) Adding acid:if acid is added to-a cell in which
sulphation exists the condition will be aggravated.
e) High specific gravity:if specific gravity is higher than
the recommended value, then sulphation may occur.
f) High temperature : high temperature accelerates
sulphation, particularly of an idle, partially discharged
battery.
Voltage of the sulphated battery :Cells of the sulphated battery will show low specific
gravity . Follow the procedure given below.
i) Check voltage before charging.
ii) Charge for 2 hours.
iii) Check voltage every one hour. If voltage increases
then continue charging. But if voltage does not
increase the discontinue charging otherwise battery
charger will get permanently damaged.
For the optimum performance and longer battery life
the maintenance of battery is important. The condition
of the battery should be checked at least once in a
month as follows :a) Always keep the battery clean and dry.
b) Visually inspect the surface of the battery container.
If there are any signs of cracking or electrolyte
leakage from battery, replace the battery.
c) Battery electrolyte level inspection—The electrolyte
level inside all the six cells should be checked fortnightly and topped up if necessary as per procedure
given below:i) Remove LH side cover. Remove battery holding band.
Remove battery after removing cables.
ii) Check whether the electrolyte level of each cell is
between the upper and lower level lines. If the level
is low in any of the cells then top-up with dis- tilled
water as follows :
• Remove the battery from vehicle.
• Remove filling caps fill distilled water until
electrolyte level in each cell reaches upper level .
If battery is not badly sulphated (i.e. voltage more than
9 volts), then battery can be revived by special
treatment. In such case it is advisable to give sulphated
battery to battery specialists for necessary special
treatment.
“NEVER ADD ACID OR ORDINARY TAP WATER FOR
TOPPING UP SINCE THIS WILL SHORTEN
BATTERY LIFE”.
•
HOW TO DETERMINE CONDITION OF BATTERY :
Specific gravity check :- Whether battery is fully charged
or partially charged, it will always show same “no load
voltage” of 12 volts or more (unless battery cells are
damaged due to sulphation etc). But specific gravity of
the fully charged battery and partially charged battery
will be different. Fully charged battery will show specific
gravity of 1.240 in tropical climate and 1.28 in cold
climate while partially charged battery will show less
specific gravity. Therefore, specific gravity check is
very important to know condition of the battery.
ALWAYS KEEP THE EXHAUST TUBE FREE FROM
OBSTRUCTIONS.
NON-USE MAINTENANCE :
When the vehicle is likely to remain off-road for a longer,
time (say more than a month) then non-use maintenance
should be carried out as follows otherwise the battery
may get sulphated and permanently damaged.
a) Remove the battery from vehicle.
b) Maintain electrolyte at “UPPER LEVEL”.
c) During off service period, battery should be charged
once a month.
d) Keep the battery fully charged.
e) Store the battery in cool, dry place.
f) Keep the battery away from rain, dew, moisture and
direct sunlight.
SAFETY :
Never bring the naked flame or spark such as a candle,
lighted cigarette etc. near the battery, especially during
or shortly after charge. Battery charging room should
be well ventilated NOTE : These are general guidelines.
BATTERY SULPHATION :
A sulphated battery is one which has been left standing
in a discharged condition or undercharged to the point
where abnormal lead sulphate has formed on the plates
(Sulphated cells looks like white crystal like sugar).
Where this happens, the chemical reactions within the
battery are affected and results in loss of capacity.
Mostly the causes of sulphation are as under :a) Undercharging.
b) Standing in a partially or completely discharged
condition for long time.
c) Low electrolyte level: if electrolyte level is permitted
to fall below the top of the battery plates, then the
56
TROUBLE SHOOTING FOR STARTER MOTOR :
COMPLAINT
Starter Motor not
working.
STEPS FOR CHECKING
CAUSE AND CORRECTIVE ACTION
A) Ensure that the battery is fully
charged. Check Specific gravity of
electrolyte in each cell. It should
be as specified
B) Fuse (10A) to be intact.
C) All terminal screws/nuts at the
starter motor. Earthing point on
the engine,battery starter relay and
the neutral switch should be clean
and tightened adequately.
D) Ignition switch must be in ‘ON’
position and engine kill switch in
run position.
E) Start button pressed.
1.1 Check for 12 V D.C. supply at the
starter motor terminal S+ with a
voltmeter (VM) D.C. Range. 25V.
1.1.1 No response indicates that 12 V D.C.
supply is not available at the starter motor
(S.M.) terminal S+. The starter circuit
needs to be checked. Refer clause 1.2
below.
1.1.2 If the V.M. indicates 12V.D.C . supply at
the S.M. Terminal S+, then the S.M. is
faulty.
1.1.3 To cross check connect battery +VE
terminal B1 directly to the S.M. +VE
terminal S+ with a 6 mm2 cable. If the S.M.
does not respond then it should be
replaced.
1.2 If the S.M. is checked as per
1.1.1 and no supply is available
at the S+ terminal then cover
the following steps.
Hear for click noise of the starter
relay while pressing starter button.
a)
b)
Refer 1.2.1 & 1.2.2 if click noise
comes
Refer 1.3 if click noise does not
come
57
1.2.1 If the click noise is present it indicates that
the relay is operating but there is no output
from the Relay. Check for 12VD.C. supply
between the input (R1) of the Relay and
chassis ground. (Start button not pressed)
If the supply is present then the cover the
following steps.
1.2.2 Check for 12V DC supply between R2 and
Ground. If the supply is present, Check
for voltage drop between R1 & R2. If the
drop is more than 2V, (start button pressed)
then relay is faulty, replace the same.
To cross check, refer 1.1.3. If starter
motor is ok, check continuity of wire from
relay to starter motor.
COMPLAINT
STEPS FOR CHECKING
1.3 Relay operation not present (click
noise of Relay operation not heard)
CAUSE AND CORRECTIVE ACTION
1.3.1 Check for 12 V.D.C. supply at the Relay
coil terminals (Soldered points C1 and C2 : Ref
circuit diagram). If the supply is indicated on the
V.M. then the Starter Relay is faulty. Replace the
same.
1.3.2 If the 12 V.D.C.supply is not indicated on
the V.M. then check for the supply between point
C1 and chassis ground. If supply is indicated
on the V.M. then it indicates that the point C2 is
not getting grounded properly through the
neutral switch. (Refer clause 1.4 below.)
1.3.3 If the V.M. doesn’t show 12 V.D.C. supply
between C1 and chassis ground then it indicates
that the battery supply is not reaching the relay
coil terminal C1.To cross check connect the
battery +ve B1 to C1 directly by a1 Sq.mm cable.
If the S.M. responds then check for the control
circuit as follows.
1.3.4 Ensure the 10 A fuse in the fuse holder
is intact.
1.3.5 Check for 12V DC supply between Red /
White wire in the coupler for Ignition Switch and
chassis ground. If the meter does not show
supply then cable from fuse to the Ignition switch
coupler may be open. (To cross check, check for
continuity between Red / White wire in switch
coupler and point F2).
If 12V DC is indicated on the meter, check for
12V DC supply between the Red wire in the
Ignition switch coupler and chassis ground.
If there is no supply then the Ignition switch is
faulty. Replace the same.
1.3.6. If the Voltmeter indicate 12V DC supply,
then ensure proper fitment of the 3 pole natural
coupler below the 'T' nose .
If both are OK then check for proper functioning
of the start button as follows :
1.3.7 Remove the 2 screws of the L.H. control
switch. Check for 12 V.D.C. supply between the
soldered Terminal (red wire) and chassis ground
(Starter button not pressed). The V.M. should
indicate 12V D.C. supply if the above clauses
1.3.4 and 1.3.5 are OK.
1.3.8 Keeping the start button pressed check
for the 12 V.D.C. supply between the red/yellow
and chassis ground. If the V.M. does not indicate
supply then it implies that the start button is
faulty. Replace the same.
58
COMPLAINT
STEPS FOR CHECKING
CAUSE AND CORRECTIVE ACTION
1.4.1 Adjust continuity range on a multimeter.
Connect the multimeter across the neutral switch
with one probe on the switch terminal (black
wire) and the other probe on the gear shifter.
If continuity is not observed then it indicates that
the neutral switch may be faulty. Take the
following steps.
1.4 Neutral switch checking.
1.4.2 Remove the neutral switch from the Gear
shifter housing. Check whether there is any oil
layer on the plunger of the switch. Clean it and
again check for continuity. If there is no continuity
then the neutral switch is faulty. Replace the
same.
1.4.3 If continuity is observed then check
whether the plunger of the switch has got
compressed and as such is not making contact
with the Gear Shifter. In that case also replace
the switch.
Armature fails to
rotate or rotates
slowly and the starter
does not crank the
engine though pinion
has engaged with
ring gear.
a)
Discharged
battery
b)
c)
e)
Relay drop high.
Loose or oxidized battery terminals/
corroded or loose defective earth
connections.
Brushes wornout and not making
proper contact with commutator.
Dirty, oily or badly burnt commutator
f)
g)
Bush worn out.
Armature defective.
a)
b)
Pinion movement sticky.
Heavily burred pinion or ring gear.
d)
Armature rotates but
pinion fails to engage.
battery / Defective
Substitute with a fully charged battery. If the
starter now cranks the engine, then the battery
must be attended to.
Repair / Replace relay.
Clean the terminal and smear petroleum jelly.
Tighten all connections.
Replace brushes, if found to be wornout.
Remove dirt or oil. If commutator is burnt,
replace armature.
Replace bush bearing.
Replace armature.
Lubricate pinion and shaft helix with light oil.
Deburr by filing and clean up.
Armature rotates,
pinion engages with
the ring gear but the
engine is not cranked.
Drive slip
Remove the starter from the vehicle and replace
drive assly., test and refit the starter.
(A whining noise is
heard).
Starter continues to
run after the switch is
released.
a)
Sticky push button switch.
b)
c)
Sticky relay
Bush in pinion seized on shaft.
d)
Pinion/Ring gear fouled or
damaged.
59
Tap on bush button switch to release if not
disconnect battery.
Disconnect battery, repair or replace relay.
Remove the starter from the vehicle and replace
bush.
Clean thoroughly deburring pinion & ring gear by
filing.
60
TROUBLE SHOOTING GUIDE
This is not an exhaustive list, giving every possible cause for each problem listed. It is meant simply as a rough
guide to assist the trouble shooting for some of the more common difficulties.
For details of Electrical Component Checking , please refer "Electricals : Maintenance & Checking" .
STARTING TROUBLE
A) No fuel supply
B) Fuel air mixture improper
l Pilot jet clogged
l No Fuel in fuel tank
l Clogged fuel filter in fuel cock
l Incorrect position of needle jet
l Carburettor holder loose
l Vacuum line disconnected
l Leakage from vacuum side of Fuel cock
l Inlet manifold bolt loose
l Insulator 'O' rings cut or insulator loose
l Fuel cock fitment not at 450 angle with respect to fuel
tank centre line
l Air filter clogged / or dry i.e.. (oil not applied)
l Fuel supply insufficient from fuel valve / excess fuel
supply
B) Flooding
l Float valve stuck / Worn out
l Fuel cock diaphragm damaged / remains open
C) Lack of power at high speed
l Spark plug gap incorrect
l Tank cap air vent obstructed
l H. T. Coil defective
l Clutch slippage
C) No. Spark / Weak spark
l Spark plug dirty / broken / maladjusted
l Main jet clogged or of wrong size
l Choke stuck open
l Spark plug cap short
l Pulser coil short
l Adulterated fuel
l Compression weak
l Charging coil short / open
l CDI unit defective
l Insufficient fuel supply from fuel cock
l Clogged air filter
l Wiring short / open
l Ignition switch short
KNOCKING
l Rotor Key broken
l TRICS not working properly (i.e. Ignition timing not
returning to 160 BTDC FROM 300 BTDC)
D) Compression Low
l Spark plug loose
l Excessive carbon build up on piston top
l Incorrect carburettor setting
l Cylinder head gasket leak / cylinder head loose
l Cylinder block / piston worn out
l Adulterated fuel
l Wrong heat range spark plug
l Worn out piston rings / sticky rings
l Valve seat improper / valve bent / carbon accumulation
CLUTCH SLIPPAGE
l No clutch lever play
l Friction plates worn out / burnt
on seating surface
INCORRECT RUNNING
A) Lack of Power
l Steel plates warped or worn out
l Clutch spring weak
l Spark plug loose
l Cylinder head gasket leak / cylinder head loose
l Hub clutch unevenly worn out
l Clutch release mechanism faulty
l Cylinder block / piston worn out
l Worn out piston rings / sticky rings
l Plunger protruding above crankcase cover surface
l Engine oil level low
l Valve seat improper / valve bent / carbon accumulation
on seating surface
62
GEAR SHIFTING NOT PROPER
l Clutch not disengaging properly
ELECTRICAL
A. Fuel Gauge not working
l Clutch / Gear cable play improper
l Gear shifter stem worn out
l Tank unit defective / loose contact at resistor coil
l Fuel meter in instrument panel defective
l Cross worn out
l Gear shifter slider jam
l No supply to tank unit.
KICK SLIP
B. Bulb fusing.
l Regulator defective.
l Clutch plates burnt
l Gear kick and ratchet kick teeth chipped off
l Bulb holder short
l Loose contact in holder.
l Spring for gear kick weak
l Guide kick broken / loose
C. Bulbs do not light
STEERING COLUMN
l Bulb fused
l Improper earthing
A. Becomes tight
l Bearing races pitted.
l Switch defective
l Loose or improper connections
l Balls pitted.
l Race fitment improper
l L. T. coil loose connection or short / open
D. Horn not working
l Horn defective
B. Excessive play
l Bearing races not fitted properly or lock ring nut loose.
l Connections loose
l Switch defective
POOR BRAKING
l Horn coil defective
l Control pedal or lever play not adjusted properly.
l Brake shoes lining worn out or oily.
l Brake drums scratched.
E. Brake light remains ON
l Sticky switch
INEFFICIENCY OF FRONT SUSPENSION
1. Noisy.
F. Vehicle not starting / not getting off
l Ignition ON - OFF switch not working
l Front Shock Absorber upper / lower mounting loose
l Front Shock Absorber weak
2. Riding instability
l Play between front brake drum and axle excessive
l Hub pin or roller bearings worn out
l Front shock absorber weak or hard
l Excessive clearance between engine foundation arm
and engine link assly
INEFFICIENCY OF REAR SUSPENSION
1. Noisy
l Spring weak or broken
l Top bracket (rubber block) for rear shock absorber
loose or broken.
63
For effective overhaul and optimum performance :
l Get fully familiarised with dismantling / assembly
procedures as given in this manual
l Always use genuine Bajaj Spares for replacement.
l Use special tools developed for disassembling and
assembly procedures.
TM
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