Worn synchronizer ring

Replace the synchronizer ring.

Worn synchronizer sleeve or gear

Replace the sleeve or gear.

Bent or distorted shift shaft

Replace the shift shaft.

Excessive free travel of all gears in axial direction

Replace the gear.

Worn bearings on input shaft or counter shaft

Replace the bearing.

Poor adjustment of clutch cable

Adjust the clutch cable.

Distorted or broken clutch disc

Replace the clutch disc.

Damaged pressure plate

Replace the pressure plate.