If there are notches worn into the splines, replace the sub clutch hub. Also, replace the steel plates if their teeth are damaged.

Clutch Housing Finger Inspection
Damper Cam InspectionTie-Rod and Rocker Arm Bearing Removal
Remove:
Tie-Rod (see Tie-Rod Removal)
Rocker Arms (see Rocker Arm Removal)
Swingarm (see Swingarm Removal)
Sleeves [A]
Oil Seals [B]
Remove the needle bearings [C], using the bearing remover
head and bearing remover shaft.
Special Tools - Bearing Remover Head,
15 ×
17: ...
Specifications
Whenever you see the symbols
shown below, heed their instructions!
Always follow safe operating and maintenance
practices.
DANGER
DANGER indicates a hazardous
situation which, if not avoided,
will result in death or serious injury.
WARNINGWARNING indicates a hazardous
situation whi ...
Gear Position Switch Installation
Securely place the springs [A] and pins [B] into the holes
[C] of the shift drum.
Apply grease to the new O-ring [D].
Install the gear position switch [E].
Apply a non-permanent locking agent to the threads of
the gear position switch screws [F].
Tighten:
Torque - Gear Position Swit ...