TM RACING 250 EN, Workshop Manual

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8
Problem Cause Solution
The shift control pedal
does not go back into position
1. Selector switch recall spring weakened or broken replace
2. gear forks worn replace
The gears disengage 1. Sliding gears couplings consumed replace
2. Brake grooves worn replace
3. housings for couplings on the gears worn replace
4. Grooves on the forks command shaft worn replace
5. Forks command pins worn replace
Insufficient engine power 1. Air filter dirty Clean
2. Low fuel quality replace
3. intake coupling loosened tighten
4. Excessive distance between spark plug electrodes Adjust
5. Insufficient compression Check the cause
6. reed valve pack plates broken replace
The engine overheats
1. Combustion chamber and/or piston crown encrusted with
carbon residues Clean
2. Obstructions to the air flow on the radiator Clean
3. Cylinder head gasket sealing faulty replace
4. the clutch slips Adjust
ELECTRIC PART
Problem Cause Solution
The spark plug electrodes
overheat
1. Insufficient distance between electrodes Adjust
2. Heat rating too high replace with recommended
spark plug
The starter motor
does not start or slips
1. Faulty starter motor repair or replace
2. Starter gears worn replace
TROUBLESHOOTING