Generic TR 125 Service Manual page 15

Rotation unsmooth (No speed or low speed)
Fault Diagnosis
Speed of Engine speed
rotation of can not arise
engine arises completely
Ignition time is Ignition time is
right wrong
Compression Compression
pressure normal pressure too low
No block Block
No pollution /
Pollution / discoloration
discoloration
Engine oil is
Engine oil is
normal
over
Normal Abnormal
No overheating Overheating
No knockings Knockings
Adjustment Check
Start engine and
add oil
Adjust ignition correct
time and use ignition
correct time light.
Compression pressure
test
Carburetor block test
Disassemble spark plug to check
Check whether engine oil volume in
bent axle tank is over or polluted
Check lubrication of
cylinder head oil
Engine is overheating
Run or travel in
increased speed
- 10 -
Fault Cause
Block of air filter
Unhealthy gasoline
Pipeline block in evaporation controlling
system of fuel tank
Block of exhaust pipe
Unhealthy auto-choke
Unhealthy air damper
Unhealthy CDI Group
Unhealthy trigger
Unhealthy cylinder plunger / packing ring
Staleness cylinder cushion
Cleaning pollutions
Cleaning pollutions
Spark plug heat value is not agreeable
Engine oil volume is over
Engine oil volume is less
No change of engine oil
Piston and cylinder wear
Mixed air is too thin
Unhealthy of gasoline
Coal in combustor is over
Ignition time is too early
Coal in combustor is over
Unhealthy of gasoline
Slipping of clutch
Mixed air is too thin
Ignition time is too early