YG125-30A Maintenance Manual
Front wheel, front overhang and steering stem
112
3.
Tire pressure insufficient
4.
Shift fork bent or damaged.
Insufficient suspension device rigidity
1.
Insufficient front fork spring
2.
Insufficient hydraulic oil refilled in the front fork
Poor brake performance
1.
The brake is not adjusted as per regulations
2.
Brake shoe worn
3.
Brake shoe has water or oil stain
Maintenance of Control system
Component
description
Damage form
Trouble symptom of
component
Trouble symptom of
motorcycle
Repair method
Steering
handle
The steering handle
is deformed
The steering handle is
bent and deformed.
Off-tracking in running.
Correct or replace
steering post
Clutch
handle
Over small of the free
stroke
Clutch is slipping
Readjust the free
stoke
Over big of the free
stroke
The clutch is not fully
disconnected
Readjust the free
stoke
Clutch
control
steel cable
The steel cable is
ineffective in cable
casing.
The clutch handle is
impossible to control
or return to the position
with difficulties
Clutch slipping or is not fully
disconnected
Clean
、
lubricate or
replace control steel
cable
The steel cable
The clutch is slipping or not
fully disconnected
Replace control steel
cable
Rear brake
pedal
The free stroke is
over small
．
The clutch is not fully
disconnected.
Readjust the free
stoke
The free stoke is
over big
．
Disoperation of rear brake
Readjust the free
stoke
For the damage form, fault symptom and repair method of front wheel
Component
description
Damage form
Trouble symptom of
component
Trouble symptom of
motorcycle
Repair method
Front wheel
Front wheel rim is
deformed
Front wheel rim is
deformed.
Off racking in running. steering
handle vibrates of shakes in
running
Replace front hub
The hub bearing
hole is over worn
The bearing block hole
has a loose match with
the bearing
．
Off racking in running
．
steering
handle vibrates of shakes in
running
Replace front rim
Bearing is over
worn or damaged
．
The axial and radial
gaps of bearing inner
and outer rings are too
big or is insufficient
rotation
．
Off racking in running
．
steering
handle vibrates of shakes in
running
Replace front
bearing
Front tire
The tire is pricked
or broken
Front tire has very low
pressure
Inflexible of direction handle,
insufficient engine output
Repair or replace tire
The tire is over
worn(the tire vein
depth is less than
It is possible to slip and has a
poor slip proof function
Replace outer tire
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