TROUBLESHOOTING 3-7
Complaint Symptom and possible causes Remedy
Dirty or heavy
exhaust smoke
• Too much engine oil in the engine
• Worn piston ring or cylinder
• Worn valve guides
• Scored or scuffed cylinder wall
• Worn valves stems
• Defective stem seal
• Worn oil ring side rails
Drain out excess oil
Replace
Replace
Replace
Replace
Replace
Replace
Slipping clutch • Weakened clutch springs
• Worn or distorted pressure plate
• Worn or distorted clutch plates
• Insufficient clutch cable play
Replace
Replace
Replace
Adjust
Dragging clutch • Some clutch spring weakened while others are not
• Distorted pressure plates or clutch plates
Replace
Replace
Transmission will
not shift.
• Broken gearshift cam
• Distorted gearshift forks
• Worn gearshift pawl
Replace
Replace
Replace
Transmission will
not shift back.
• Broken return spring on shift shaft
• Rubbing or stickily shift shaft
• Distorted or worn gearshift forks
Replace
Repair or replace
Replace
Transmission jumps
out of gear.
• Worn shifting gears on driveshaft or countershaft
• Distorted or worn gearshift forks
• Weakened stopper spring on gearshift stopper
• Worn gearshift cam plate
Replace
Replace
Replace
Replace
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