Transmission And Shifter; Clutch - Yamaha YTZ250S 1986 Service Manual

Transmission and shifter
Trouble Possible Cause Remedy
Gears slip off
1. Gear dogs are worn.
• Replace
2. Shift forks are bent.
• Replace
(burnt or worn)
3. Shift cam stopper spring is
• Replace
fatiqued
Gear shifts skipping
1. Shift cam stopper spring is
• Replace
over the next.
fatigued.
2. Shift forks are bent.
• Replace
(burnt or worn)
Gear does not select
1. Shift cam is worn. (broken)
• Replace
2.
Change shaft is bent.
• Replace
3.
Shift arm spring is broken.
• Replace
4.
Gears are broken. • Removal (Replace)
Shift pedal does not
1. Change return spring is broken.
• Replace
return
2. Change shaft is bent.
• Replace
Clutch
Trouble Possible Cause Remedy
Clutch slips 1. Friction plate is worn.
• Replace
2. Clutch plate is worn.
• Replace
3. Clutch spring is fatigues.
• Replace
4. Pressure plate is deformed.
• Replace
5. Clutch play is too small.
• Adjust
6.
Clutch adjustment is incorrect.
• Adjust
7. Match marks of clutch boss and
• Reassemble
pressure plate does not aligned.
Clutch drags
1. Clutch plate is worped.
• Replace
2. Clutch lock nut is loosen.
• Replace
3. Friction plate is broken.
• Replace
4. Clutch play is too much.
• Adjust
!.
Oil viscosity is incorrect.
• Replace
6-4