BT125T-2
SERVICE MANUAL
JIANGMEN SINO-HONGKONG BAOTIAN MOTORCYCLE INDUSTRIAL CO., LT D
CONTENTS
CHAPTER ONE MAINTENANCE OF THE MOTORCYCLE
Ⅰ. ITEMS OF MAINTENANCE 1
Ⅱ. PERIODIC MAINTENANCE SCHEDULE AND MAINTENANCE LOCATIONS 1
Ⅲ. MAINTENANCE SPECIFICATIONS 4
Ⅳ. THROTTLE ACTUATION INSPECTION 5
Ⅴ. AIR FILTER INSPECTION AND CLEANING 6
Ⅵ. BRAKE SYSTEM INSPECTION, ADJUSTMENT AND REPLACEMENT 6
Ⅶ. FRONT AND REAR SHOCK ABSORBER INSPECTION 9
Ⅷ. FRONT WHEEL AND REAR WHEEL INSPECTION 9
Ⅸ. STEERING STEM INSPECTION 10
CHAPTER TWO MAINTENANCE INFORMATION
Ⅰ. FRAME NUMBER AND ENGINE NUMBER LOCATION 11
Ⅱ. PRECAUTIONS IN OPERATION 11
Ⅲ. SPECIFIED TORQUES 12
CHAPTER THREE BODY TROUBLESHOOTING
SECTION ONE BODY COMMON TROUBLES AND TROUBLE DETECTION 14
SECTION TWO DETAILED DESCRIPTIONS OF BODY PARTS TROUBLES
Ⅰ. FRONT WHEEL SERVICE 17
Ⅱ. FRONT BRAKE SERVICE ( DISK BRAKE ) 19
Ⅲ. FRONT SHOCK ABSORBER SERVICE 21
Ⅳ. FRONT FORK SERVICE 22
Ⅴ. HANDLEBAR SERVICE 24
Ⅵ. REAR WHEEL SERVICE 25
Ⅶ. REAR BRAKE SERVICE ( DISK BRAKE ) 27
Ⅷ. REAR SHOCK ABSORBER SERVICE 27
CHAPTER FOUR ELECTRIC PART TROUBLESHOOTING
SECTION ONE ELECTRIC PART COMMON TROUBLES AND TROUBLE DETECTION 28
SECTION TWO DETAILED DESCRIPTIONS OF ELECTRIC ASSEMBLIES AND PARTS SERVICE
Ⅰ. PRECAUTIONS IN ELECTRIC CIRCUIT SERVICE 31
Ⅱ. POWER CHARGING SYSTEM SERVICE 31
Ⅲ. IGNITION SYSTEM SERVICE 37
Ⅳ. ELECTRIC STARTING SYSTEM SERVICE 43
Ⅴ. LIGHTING AND SIGNAL SYSTEM SERVICE 44
CHAPTER ONE MAINTENANCE OF THE MOTORCYCLE
Ⅰ. ITEMS OF MAINTENANCE
When the motorcycle is used, loosening of parts and mechanical wear inevitably occur to
varied extents. Neglect of timely maintenance not only reduces its mechanical function,
economic performance, stability and durability, but also threatens the safety of the motorcycle
and the rider. Correct and timely maintenance of the motorcycle is a must. Items of maintenance
refer to the parts and positions for maintenance. Different items of maintenance are effected at
different intervals and in different manners.
1. Running-in Maintenance
This is the maintenance at the end of the first 1000km and is an all-round inspection of the
motorcycle. A newly-bought motorcycle or a motorcycle fresh from an overhaul might be
severely overheated as a result of severe friction between the moving parts which might be
imperfect in finishing or fitting. Neglect in use might lead to damage of the friction surfaces and
might threaten the performance, and the service life, of the motorcycle. Please observe the
following points:
z Restrict the speed in speed range specified in the instruction manual.
z Restrict the load to 2/3 of the maximum load and ride in fairly good road conditions.
z Restrict the length of riding time to avoid long-time running of the engine.
z Replace engine oil at short intervals so that metal chips caused in the running-in period
can be discharged. It is recommended to replace engine oil for 3 times during the
running-in period.
2. Routine Maintenance
Routine maintenance is the basis of all kinds of maintenances. It refers to the daily
maintenance, including cleaning, ins pec tion and common troubleshooting.
3. Periodic Maintenance
This maintenance is to restore normal performance of the motorcycle. The maintenance is
classified into first-grade periodic technical maintenance and second-grade periodic technical
maintenance (also known as items of maintenance) according to different mileages. Generally
speaking, a first-grade maintenance is effected after the initial 4000km and a second-grade
maintenance is effected every 8000km. As the service time extends, maintenance intervals
should be shortened accordingly.
Ⅱ. PERIODIC MAINTENANCE SCHEDULE AND MAINTENANCE LOCATIONS
After a period of use (one day, one month or half a year, for example) or a certain mileage
(1000km, 4000km, 8000km, for example), an all-round maintenance operation should be
effected, including comprehensive inspection, adjustment, tightening, lubrication, cleaning or
replacement. The specific regulation made according to time intervals or mileages is known as
maintenance interval. The motorcycle maintenance schedule is as follows.
1
1. Maintenance Schedule
Maintenance Schedule
time
item
Mileage 1000km
1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000
New R
Engine oil R R R R R R R R R R R
300km
Engine oil
strainer
C C
Gasoline
strainer
R
New R
Gear oil Note 4 R R
300km
Throttle play A A A A
Carburetor I I C
Note 3,
4
Air filter I R R
Spark plug Clean every 3000km, replace when necessary
Brake system I I I I I I I I I I I I
Drive belt I
Suspension I I I
Tire I I I
Steering rod
bearing
I I I
Screws and
bolts of parts
I I
Notes:
1. I: Inspect and when necessary, clean, lubricate, supplement, modify or replace;
A: adjust; C: clean; R: replace; T: tighten.
2. Effect periodic maintenance according to the instructions in the user’s manual.
3. When the mileage exceeds the range specified in the schedule, repeat the maintenance.
4. In dusty or rainy conditions, inspection and replacement should be effected earlier.
5. In heavy load, long distance or rainy conditions, replacement should be effected earlier.
2
2. Maintenance locations
Throttle grip
actuatio n,play
£¨£©
Oil tank
brake oil level
£¨£©
Front shock absorber
damage, looseni ng
£¨£
©
Front rim
damage, oscillatio n
£¨£©
Front tire
wear,damage,tire pressure
£¨£
©
Headlig ht
beam adjustment
£¨£©
Rear shock absorber
damage ,looseni ng
£¨£©
Air filter
contamination
£¨£©
Rear brake disc
damage ,wear
£¨£©
Rear brake caliper
wear of brake block
£¨£©
Gear case
engine oil quantity,
oil replacement
£¨
£©
Spark plug
damage ,conta mina tion
£¨£©
Front brake disc
damage ,wear
£¨£©
Front brake caliper
wear of brake block
£¨£©
Rear rim
damage ,oscill ation
£¨£©
Rear tire
wear,damage,tire pressure
£¨£©
Oil tank
brake oil level
£¨£©
3
Ⅲ. MAINTENANCE SPECIFICATIONS
The basic methods of motorcycle maintenance include inspection, adjustment, tightening,
lubrication, cleaning, supplementing and replacement, which constitute the main elements of
maintenance.
1. Inspection
Inspection refers to basic inspecting operations in accordance with items and
requirements specified in the user’s manual, including inspection with instruments or
with eyes for abnormalities in machine parts, directly comparing related data and
aligning with tools and gauges.
2. Adjustment
Adjustment refers to inspection-based adjustment and rectification of some specified
machine parts, including adjustment of machine part plays and rectification of
misfittings and deformations so as to restore correct positions, forms and plays.
3. Tightening
Tightening refers tightening of bolts, screws and nuts of machine parts with tools so as
to avoid loosening of machine parts and to obtain specified tightening torques.
4. Cleaning
Cleaning is needed by machine parts and positions which call for cleanliness and
tidiness. Cleaning operations include all the means and measures taken to remove dust,
contamination, metal chips, oily stains and carbon deposits that might lead to pipe
clogging or reduction in motorcycle performance. Cleaning measures are washing,
carbon deposit removing, rubbing, cleaning and clearing.
5. Lubrication
In order to facilitate smooth and easy running of moving machine parts, including
swinging parts, reciprocating parts, sliding parts and vibrating parts, to reduce scuffing,
abrasion, deformation and to reduce friction, it is necessary to coat or spray these parts
with a lubricant. Different lubricants and lubricating methods are required for different
machine parts with different functions. Application of lubricants to machine parts is
known as lubrication.
6. Replenishing, supplement and replacement
These operations refer to addition of oil, lubricants, cooling water, electrolyte, fuel and
replacement of damaged parts with new ones and replacement of denatured oils with
new oils.
4
IV. THROTTLE ACTUA TION INSPECTION
Inspect throttle grip for easy and smooth
movement.
Inspect throttle free travel.
Free travel: 2-6mm
The main adjusting position is beside the
carburetor.
Remove rear store case cover.
Adjust by loosening the fastening nut and
turning the adjusting nut.
Fine adjustment is effected on the side of
the throttle grip.
Effected adjustment is by removing the dust
cover, loosening the tightening nut and turning
the adjusting nut.
adjusting nut
dust cov er
tightening nut
free tr avel:2-6mm
adjusting nut
tightening nut
5
Ⅴ. AIR FILTER INSPECTION AND CLEANING
After a certain mileage, dust and impurities will gather in air filter case and strainer, which
will clog strainer pores and reduce inlet of air and thus lead to excessive concentration of mixed
gas and reduce the performance of engine. That’s why the strainer must be replaced every
20000km and in dusty or rainy conditions strainer must be replaced earlier.
Air Filter Strainer Inspection and Replacement:
Remove 7 screws of air filter.
Remove air filter strainer cover.
Remove 2 tightening screws of air filter
strainer.
Take out air filter strainer.
Inspect the strainer if there is any dust and
damage in it.
Replace it in case of dirty or damage.
z Don’t use water or any oil cleanser to
clean it.
z The papery air filter strainer cannot be
cleaned by air because it is oil based.
Mount strainer.
Mount strainer cover.
Ⅵ. BRAKE SYSTEM INSPECTION, ADJUSTMENT AND REPLACEMENT
1. Front Brake (disk brake)
Remove the bolts linking brake caliper and
front shock absorber.
Remove brake caliper.
brake caliper
bolt
front shock
bolt
absorber
air filter straine r
screws
strainer cover
screws
6
* Do not pull brake lever when brake caliper is
removed so as to prevent jamming of brake
block.
If brake block is jammed, pry it with screwdriver
and push piston back into caliper.
Brake Block Replacement:
Brake block must be replaced when it is worn
to the limit of use.
* It is not necessary to remove brake oil pipe
when replacing brake block.
* Brake block must be replaced as a set.
Remove two pieces of brake block pins by
means of a hexagon wrench.
brake block
brake caliper
Effect mounting in an order reversed to that of
dismounting.
*After effecting, first tighten the brake caliper
and put its hole right to the hole of brake caliper
and then put the brake block pin in and tighten it.
Brake Disc Inspection:
Inspect brake disc thickness.
Limit of use: 3.0mm
Inspect brake disc angularity.
Limit of use: 0.3mm
brake block pin
brake block pin
press brake block
7
2. Rear Brake (disk brake)
Remove the bolts linking brake caliper and
rear brake mounting board.
Remove brake caliper.
* Do not pull brake lever when brake caliper is
removed so as to prevent jamming of brake
block.
If brake block is jammed, pry it with screwdriver
and push piston back into caliper.
Brake Block Replacement:
Brake block must be replaced when it is worn
to the limit of use.
* It is not necessary to remove brake oil pipe
when replacing brake block.
* Brake block must be replaced as a set.
The method of replace the rear brake block is
the same as the front brake block'.
Brake Disc Inspection:
Inspect brake disc thickness.
Limit of use: 3.0mm
Inspect brake disc angularity.
Limit of use: 0.3mm
rear brake
caliper
brake disc
mounting bolts
mounting board
rear brake
8
Ⅶ. FRONT AND REAR SHOCK ABSORBER INSPECTION
1. Front Shock Absorber
Tighten front brake lever, press front shock
absorber up and down and inspect actuation.
Inspect front shock absorber to see if there is
leakage of oil and if there is damage or loosening.
2. Rear Shock Absorber
Press rear shock absorber to inspect
actuation. Inspect rear shock absorber to see if
there is oil leakage and if there is damage or
loosening in machine parts.
Lift rear wheel, press rear wheel right and
left to inspect if engine suspension lug buffer
bush is loose.
Ⅷ. FRONT WHEEL AND REAR WHEEL INSPECTION
Wheel Rim Inspection:
Inspect wheel rim, remove rust stains and rubber chips.
Deformation and fissures are causes of air leakage. Do not use wheel rims in the following
cases:
Bruise of wheel rim face contacting tire bead ring exceeds 0.5mm in depth and 1.0mm in
width.
Tire Inspection:
Inspect if there is fissure or iron nail in the tire.
In one of the following conditions, tires must be replaced instead of repair.
z Puncture of tire by a foreigner matter 6mm in diameter or tire fissure.
z Layered tire.
front brake leve r
z Chunking of tread
z Damaged tire bead
z Broken tire bead or other tire bead damages
z Broken tire cord
9
z Damage due to forced dismounting
z Fissure extending to frame
z Abnormal inner lining
z Tire groove wear: front wheel < 0.8mm, rear wheel < 0.8mm.
z Punctured or otherwise damaged tire flank
Inspect tire pressure by means of a tire pressure gauge
* Tire pressure should be inspected when the motorcycle is in a cold state.
Specified pressure Unit: kPa
Front wheel 250
Rear wheel 250
Tire Specifications:
Front wheel 120/70-12 56J
Rear wheel 110/90-12 64J
Inspect if front wheel nut is loose.
Inspect if rear wheel nut is loose.
If loose, tighten them to specified torques.
Torques: front wheel nut 60N·m
rear wheel nut 120N·m
Ⅸ. STEERING STEM INSPECTION
Swing handlebar right and left to see if there
is interference such as wire or other things.
Turn front wheel to see that handlebar is easy
in operation.
In case of any difficulty in operation, inspect
steering stem bearing assembly.
front axle nut
rear axle nut
10
CHAPTER TWO MAINTENANCE INFORMATION
I. FRAME NUMBER AND ENGINE NUMBER LOCATION
II. PRECAUTIONS IN OPERATION
z Removed washers, 0-rings, elastic retaining rings and split pins must be replaced with
new ones.
z When mounting bolts, nuts and screws, proceed from trial tightening, from larger
diameters to smaller diameters and inner ones to outer ones in a diagonally order. Tighten
them to specific torques.
z Parts and greases must be those made by our factory or recommended by our factory.
z Special operations must be effected with special tools or specified universal tools.
z Removed parts must be rubbed or cleaned before they are inspected or measured. They
must be coated on the sliding faces before mounting.
z They must be greased at the specified positions with designated or equivalent greases.
z Parts must be tightened and their performances inspected at their positions when
mounted.
z The battery’s negative terminal must be disconnected before operation.
Make sure that tools such as wrenches are not in contact with the frame.
z At the completion of operations, reconfirm correct connections and fastenings.
The positive terminal must be connected first in case of a removed battery.
Connected terminals must be coated with lubricant.
The terminals must be completely covered with caps.
z When a fuse is burnt, inspect the cause and replace the fuse with a fuse of equivalent
capacity.
z At the completion of operation, completely cover terminals with caps.
z When removing connectors with locks, they must be unlocke d before opera ti on.
z When removing connectors, the connectors proper must be held instead of pulling their
wires.
engine number
Frame
Number
11
z Before connecting connectors, confirm that they are free from breakage, bending, over
length or loosening.
z Connectors must be inserted home.
When connecting connectors with locks, confirm that their locks are fastened.
Confirm that the wires are not loose.
z Confirm that connectors’ plastic sleeves completely cover the connectors without fail.
z Before connecting the connectors, confirm that their sleeves are free from breakage and
their terminals are not oversized.
z Connector plugs must be fully inserted.
Confirm that plastic sleeves completely cover the terminals.
Plastic sleeves should not be placed with the open side up.
z Wire bunch bands should be fixed at the specified position of motorcycle frame.
z Wire clamps must correctly keep wires in place.
Avoid welding stains of welded clamps when clamping wires.
z Wire bunches must be fixed away from turning or moving parts.
z Do not damage the covering of wire bunches.
In case of wire bunch defects, remedy it with insulating bands.
z Wire bunches must not be covered with mounted parts.
z Do not twist or bend cables by force. Deformed or damaged cables would result in poor
rotation or damage.
III. SPECIFIED TORQUES
Torques at important positions and standard torques of other positions are as follows:
12
SPECIFIED TORQUES
Frame:
Designations of tightening positions Number Thread specification Torques: N·m
Engine suspension lug mounting nut 1 M10 45
Engine mounting nut 1 M10 45
Front axle nut 1 M12 60
Rear axle nut 1 M16 120
Rear shock absorber upper mounting bolt 1 M10 40
Rear shock absorber lower mounting bolt 1 M10 25
Front shock absorber upper lock bolt 4 M8 35
Steering stem lock nut 1 M25 70
Handlebar mounting nut 1 M10 45
Upper bearing top 1 M25 2.5
Exhaust muffler connector nut 2 M6 12
Exhaust muffler mounting bolt 2 M8 35
Standard Torques:
Designations Torques: N·m
Bolt, nut M5 5
Bolt, nut M6 10
Bolt, nutM8 21.5
Bolt, nut M10 35
Bolt, nut M12 55
Screw M5 4
Screw M6 9
Flange bolt, nut M6 12
Flange bolt, nut M8 27
Flange bolt, nut M10 40
13
CHAPTER THREE BODY TROUBLESHOOTING
SECTION ONE BODY COMMON TROUBLES AND TROUBLE DETECTION
Body part common troubles and possible causes are as follows:
Troubles Causes Details (reference)
Over tightening of handlebar adjusting nut
Handlebar rotation not
easy (strenuous turning
or unstable tightness)
Refer to “Front Fork
Service”
Steering stem over worn
Incorrect mounting of brake cable or
tachometer cable
Refer to “Handlebar
Service”, “Front Fork
Service”
Remarkable deformation of steering stem
due to outside impact
Over tightening of steering stem top ball
bearing retainer
Heavy steering stem
turning
Refer to “Front Fork
Service”
Damaged or broken ball bearing
Refer to “Front Wheel
Service”, “Rear Wheel
Service”
Reduced tire air
Refer to “Front Shock
Absorber Service”
Imbalance of right and left shock absorbers
Refer to “Front Fork
Service”
Bent front fork
Deflected steering stem
Refer to “Front Wheel
Service”
Bent front tire, deflected tire
Bent brake lever
Air in hydraulic device
Leakage in hydraulic
device
Clogged hydraulic
passage
Inadequate liquid
Contaminated brake
block and brake disc
Refer to “Brake System
Inspection, Adjustment
and Replacement”,
“Front Brake Service”
Feeble brake
lever
Disk brake failure
Bent or deformed brake
disc
Contaminated brake
caliper
14
Chart continued
Troubles Causes Details (reference)
Worn seal ring of brake
caliper piston
Viscous or worn brake
caliper piston
Inability of brake
caliper normal sliding
Worn main cylinder
piston seal ring
Feeble brake
lever
Viscous or worn main
cylinder piston
Contaminated main
cylinder
Clogged narrow brake
system
Clogged narrow liquid
passage
Viscous worn brake
caliper
Refer to “Brake System
Inspection, Adjustment
and Replacement”,
“Front Brake Service”
Disk brake failure
Inability of brake
caliper normal sliding
Stiff brake lever
Worn seal ring of brake
caliper piston
Viscous or worn main
cylinder piston
Contaminated brake
block and brake disc
Bent or deformed brake
disc
Inability of brake
caliper normal sliding
Resisted
braking
Wheel not adjusted
straight
Refer to “Front Fork
Service”
Steering stem rotation not easy
Bent shock absorber
Deviation of
motorcycle direction
(inclining to roadside )
Refer to “Front Shock
Absorber Service”
Shock absorber oil leakage
15
Chart continued
Troubles Causes Details (reference)
Bent front axle, incorrect wheel
mounting
Roundness error of wheel rim
Deformation of wheel rim
Deviation of motorcycle
direction (inclining to
roadside)
Refer to “Front Wheel
Service”
Inadequate tire pressure
Deformed wheel rim
Loose front wheel bearing
Poor tire
Refer to “Front Wheel
Service”
Front wheel oscillation
Poor axle locking
Refer to “Front Shock
Absorber Service”
Soft front shock absorber Spring fatigue
Deformed wheel rim
Refer to “Rear Wheel
Service”
Rear wheel oscillation
Poor wheel
Refer to “Rear Shock
Absorber Service”
Soft rear shock absorber Spring fatigue
16
SECTION TWO DETAILED DESCRIPTION OF BODY PARTS TROUBLES
Precautions in Operation:
z Forced mounting or dismounting of body cover parts will cause damage to claws and slots
of corresponding hoods.
z When mounting body cover parts, be sure to align the corresponding parts of hoods.
z When mounting body cover parts, avoid pressing wires, cables or pipes.
-
I. FRONT WHEEL SERVICE
Front Wheel Dismounting:
Support the body bottom to lift front wheel.
Remove front axle nut, brake calipers, front
absorbers connecting bolt and remove brake
calipers, front shock absorber, transmission gear
box, front axle bush and the small bush, remove
front axle.
Remove front wheel.
Remove brake disc mounting bolts.
Remove brake disc.
front sho ck
transmission gear box
front axle nut
front axle
absorber
brake disc
brake caliper
bolt
front axle
mounting bolt
front wheel
front shock
absorber
front axle bush
small front axle bush
17
Axle Bending Inspection
Place axle on a V-seat and measure with a dial
gauge.
The dial gauge indicates a 1/2 bending value.
Limit of use: Replace if >0.2mm.
Wheel Rim Oscillation Inspection
Measure oscillation value on a correcting bench.
Limit of use: Replace if >2.0mm.
Traverse direction: Repla ce i f >2.0mm.
Front Wheel Bearing Inspection
Remove front wheel bearing and dust cover.
Turn bearing inner race to inspect sliding.
Replace it with a new one in case of no sliding or
damage or loosening of outer race.
Front Wheel Bearing Replacement
dust co ver
front axle bush
Dismounting: Remove front wheel bearin g by
means of a bearing remover, take out spacer.
Mounting: Apply grease to the bearing.
Drive in left bearings.
18
Mount spacer.
Drive in right bearings.
z Bearings must be driven in parallel.
z Dust cover must be driven in with the face out.
Apply grease to new dust cover lip.
Mount front axle bush.
oil reserv oir co ver
Front Wheel Mounting
Mount brake disc, tighten brake disc mounting bolts.
Torque: 27N·m
Spread front axle with a thin film of grease.
Mount front axle from left side.
Mount in order small bush, left front shock absorber, bush, front wheel, transmission gear box,
right front shock absorber, front axle nut and fasten it.
Torque: 60N·m
Mount brake caliper as specified.
II. FRONT BRAKE SERVICE (DISK BRAKE)
Brake Oil Replacing
z Prevent dust or water from entering brake system.
z Do not use brake oils of different specifications or impure brake oils.
z Prevent brake oil from dripping onto rubber, plastic or painted parts.
Brake Oil Exhausting
Place main cylinder at a level place, remove oil
reservoir cover and diaphragm.
Connect a hose to oil exhaust valve, loosen
exhaust valve, grip and release brake lever till oil
is exhausted.
Brake Oil Replenishing
Lock exhaust valve.
Replenish oil reservoir with specified brake oil.
z It is not necessary to fill the oil reservoir
to its full capacity.
z Brake oil for replenishing should be the
same as original.
exhaust valve
19
The specification of brake oil is indicated on the
reservoir cover .
Place diaphragm.
Connect a transparent hose to exhaust valve.
Grip brake lever fast and open exhaust valve 1/2
turn to let out air and lock exhaust valve. Repeat
this operation till no bubbles are exhausted from
brake oil passage.
z Do not release brake lever before exhaust
valve is closed.
At the completion of adjustment, replenish brake
oil till oil is over the lower limit line of the oil
reservoir.
Mount diaphragm set and oil reservoir cover.
Tighten oil reservoir cover bolt.
Main Brake Oil Tank Dismounting and Mounting
Dismounting
Remove each 2 bolts and screws of front part and
rear part of head cover.
Remove front part and rear part of head cover.
Exhaust brake oil from front brake system.
Pull out brake switch plug from main cable.
Remove bracket bolts from handlebar;
Remove main cylinder.
Remove brake oil pipe from main cylinder.
z Prevent brake oil from splashing to
rubber, plastic or painted surfaces. Cover
the above-mentioned parts with a cloth.
lower limit line
brake lever
gripping
releasing
bracket bolts
main cylinder
20
head cover front part
head cover
bolt
rear part screw
Remove brake light switch and brake lever.
Remove retaining ring from main cylinder.
z Use special retaining ring remover when
removing retaining ring.
Remove piston cover, piston and spring.
Clean oil reservoir and piston with pure
brake oil.
z Do not effect cleaning with gasoline as it
is corrosive to rubber parts.
Inspection
Inspect for wear or ageing of main and auxiliary cups on pistons.
Inspect for scratches and other damages on main cylinder and piston.
Measure main cylinder bore.
Measure outside diameter of piston at the end of auxiliary cup.
Mounting
Apply pure brake oil to piston, main cup and auxiliary cup.
Mount spring, piston, retaining ring and piston cap.
z Piston cup cannot be used inside out.
Apply grease to brake lever axis pin.
Mount brake lever and brake switch.
Mount main cylinder, main cylinder bracket and lock them.
Mount brake oil pipe.
oil pipe bolt
brake oil pipe
Connect brake light switch cable with switch.
Mount head cover front part and rear part.
Replenish brake oil and exhaust air in brake system.
III. FRONT SHOCK ABSORBER SERVICE
Dismounting
Remove body covering parts.
Remove front wheel.
21
front wheel
front shock absorber
Remove 4 pieces of bolts on the upper part of
front shock absorber.
Remove shock absorber.
Inspection
Inspect if there is oil leakage in front shock
absorber, if there is deformation of shock
absorber arm and if there is damage or loosening
of any part.
Mounting
Mount front shock absorber on front fork and
mount 4 bolts.
Torque: upper bolt 35N·m.
Mount front wheel.
IV. FRONT FORK SERVICE
Dismounting
Remove motorcycle body covering parts.
Remove nut and blot from handlebar;
Remove handlebar.
Remove steering stem setting nut.
Remove upper bearing cup, upper bearing top
and bearing set.
upper bearing
cup,bearing top
and ball set
handlebar
set nut
bolt
nut
head tube
bolts
body covering
parts
body covering
parts
22
Remove front axle nut;
Remove front wheel.
Remove front shock absorber, front fender (the
mounting screws is inside the fender) etc.
Remove steering stem from head tube.
The removing of the bottom bearing cup, bearing
top and bearing set is the same as the removing
of the upper series.
front fender
screws
shock absorber
z Do not damage steering stem when
removing bearing cup and bearing top.
z Clean opening parts of motorcycle body
covering parts with cloth.
Inspection
Inspect if there is slot or pit in bearing cup and
bearing top. If there is, effect replacement.
Inspect for completeness of bearing balls and if
there is, effect replacement with new ones.
Inspect for proper tightness of steering stem and
if not, effect adjustment and fasten it.
Inspect for correct position of bearing cup and bearing top and if not, effect correct mounting.
Bearing Cup and Bearing Top Replacement
Remove bearing cup and bearing top with special bearing cup and bearing top removers.
Mounting
Apply grease to bearing cup and bearing top at the bottom.
Mount in order bottom bearing cup, bearing ball set, bottom bearing top on the bottom of
steering stem.
Pass steering stem through head tube.
bottom bearing
cup,bearing top
and ball set
head tube
upper bearing top
ball set
ball set
bottom bearing cup
bottom bearing top
upper bearing cup
23
Mount front fender on steering stem.
Mount front wheel.
Mount front shock absorber and other parts.
Apply grease to top bearing cup and bearing top.
Mount in order upper bearing cup, bearing ball set and upper bearing top on the upper part of
steering stem and fasten them.
Torque: 15 N·m
Turn front fork right and left to effect close contact of bearing balls.
Loosen upper bearing top to torque 0 and fasten it.
Torque: 2.5N·m
Fix upper bearing top and tighten steering stem setting nut.
Torque: 70N·m
Turn front fork and confirm easy rotation without loosening.
Mount handlebar.
V. HANDLEBAR SERVICE
Dismounting
Remove covering parts of front part and rear part.
Remove rear brake main cylinder.
Remove connectors of left handlebar switch.
Remove 2 screws of left handlebar switch.
Remove left handlebar switch.
Remove left grip from handlebar.
Remove front brake main cylinder.
Remove connectors of right handlebar switch.
Remove 2 screws of right handlebar switch.
Remove right handlebar switch.
Remove throttle cable from throttle grip.
Remove throttle grip from handlebar.
Remove handlebar bolt and nut from handlebar.
Remove handlebar.
z When removing left handlebar and throttle
grip, remove contamination and grease
from contacting face.
throttle cable
throttle gr ip
right hand lebar swit c h screws
24
left handlebar switch
screws
handle bar
main cylinder
rear brake
Mounting
Mount handlebar on steering stem guide tube,
setting bolt and nut.
Torque: 45 N·m
Mount rear brake main cylinder and fasten bolts.
Mount left handlebar switch and fasten screws.
Torque: 9 N·m
Mount front brake main cylinder and fasten
bolts.
Mount right handlebar switch and fasten screws.
Torque: 9 N·m
Apply grease to throttle cable.
Mount throttle grip and connect throttle cable.
Mount left grip.
Mount covering parts of front head cover and rear head cover.
z Confirm easy rotation of throttle grip.
z When mounting handlebar rubber, apply a thin film of adhesive to contacting face and
then mount grip in a turning manner.
VI. REAR WHEEL SERVICE
Dismounting
Remove 2 connecting nuts and 2 mounting bolts
of exhaust muffler.
handlebar
nut
bolt
Remove exhaust muffler.
connecting nuts
exhaust muff ler
25
exhaust muffler
mounting bolts
Remove the bolts linking brake caliper and rear
brake mounting board.
Remove rear brake caliper.
Remove rear axle nut.
Remove rear brake mounting board and bush.
Remove rear wheel.
Remove 3 mounting bolts of brake disc.
Remove brake disc.
Rear Wheel Oscillation Inspection
Measure oscillation value on a correcting bench.
Limit of use: Longitudinal >2.0 mm
Traverse >2.0 mm
Mounting
Mount rear wheel with brake disc.
Mount rear wheel, bush, rear brake mounting
board and fasten rear axle nut.
Torque: 120N·m
z The hole on the rear brake mounting board must be matching with the hole on the engine.
Mount exhaust muffler.
Fasten exhaust muffler connecting nuts.
Fasten mounting bolts of the exhaust muffler, engine and rear brake mounting board.
Exhaust muffler connecting nut: 12N·m
Exhaust muffler mounting bolt: 35N·m
Mount rear brake caliper.
rear wheel
brake disc
mounting bolts
nut
rear brake caliper
mounting board
rear brake
brake di sc
rear wheel
mounting bolts
26
VII. REAR BRAKE SERVICE (DISK BRAKE)
The service of the rear brake is the same as the front brake.
VIII. REAR SHOCK ABSORBER SERVICE
Dismounting
Remove motorcycle body covering parts.
Remove mounting bolt connecting rear shock
absorber and motorcycle frame, bolt connecting
rear shock absorber and engine.
Remove rear shock absorber.
Inspection
Inspect rear shock absorber oil seal for oil
leakage, inspect buffer bar and spring for
deformation and other parts for damage and
loosening.
Mounting
Mount rear shock absorber.
Torque:
upper mounting bolt: 40N·m
bottom mounting bolt: 25N·m
Mount motorcycle body covering parts.
bolt
absorber
rear shock
frame
absorber
rear shock
bolt
engine
27
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