Clutch slipping
Clutch
- Improperly adjusted clutch cable
- Loose clutch spring
- Fatigued clutch spring
- Worn friction plate / clutch plate
- Incorrectly assembled clutch
Engine oil
- Improper oil level
- Improper viscosity (high)
- Deterioration
Clutch dragging
Clutch
- Warped pressure plate
- Unevenly tensioned clutch springs
- Bent push rod
- Broken clutch boss
- Burnt primary driven gear bushing
- Bent clutch plate
- Swollen friction plate
- Match marks not aligned
Engine oil
- Improper oil level
- Improper viscosity (high)
- Deterioration