Noise seems to come from gearbox
1. Worn gears Replace
2. Worn gear grooves Replace
Noise seems to come 1. Chain stretched (worn) or improperly adjusted Replace or adjust
from secondary drive 2. Worn transmission sprocket and rear chain sprocket Replace
chain
Clutch slips 1. Weak clutch springs Replace
2. Worn clutch plates Replace
3. Loosened clutch idler gear nut Tighten nut
Clutch is hard to operate 1. Uneven spring load Replace
2. Bent clutch plates Replace
Gears do not engage 1. Bent or seized shifter forks Replace
2. Worn gear ratchets Replace
3. Damaged shifter fork shafts Replace
Gear shift pedal
does not return to original position
1. Weak or broken selector return spring Replace
2. Worn shifter forks Replace
Transmission jumps out of gear 1. Worn sliding gear dogs Replace
2. Worn gear grooves Replace
3. Worn dog slots in gears Replace
4. Worn selector shaft splines Replace
5. Damaged shifter fork shafts Replace
Engine has low power 1. Dirty air lter Clean
2. Poor fuel quality Replace
3. Intake coupling loose Tighten
4. Spark plug electrode gap too wide Adjust
5. Insufcient compression Identify cause
6. Incorrect valve clearances Adjust
7. Valve seats or guides faulty Replace
8. Weak or seized valve springs Replace
Engine overheats 1. Combustion chamber and/or piston crown fouled
with carbon deposits Clean
2. Insufcient oil in engine or
wrong oil Top up or change
3. Obstructions blocking air ow on radiator Clean
4. Cylinder head gasket leaking Replace
5. Clutch slips Adjust
6. Cooling fan faulty (TE-TXC-SMR) Replace thermal switch
7. Low coolant level Top up to correct level
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