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 InspectionIdle Speed
The idle speed inspection should be
performed in accordance with the Periodic
Maintenance Chart.
This motorcycle is equipped with the
Idle Speed Control valve. If the idle
speed is disturbed, inspection of the
idle speed control should be done by
an authorized Kawasaki dealer.
NOTE
While ...
Cylinder Head Removal
Remove:
Thermostat Housing (see Thermostat Removal in the
Cooling System chapter)
Exhaust Pipe (see Exhaust Pipe Removal)
Camshafts (see Camshaft Removal)
Heat Insulation Plate [A] (see Engine Removal in the
Engine Removal/Installation chapter)
Place a container under the coolant dr ...
Exploded View
25. “1T” marked side faces up.
26. “T2” marked side faces up.
27. Hollow mark faces exhaust side.
G: Apply grease.
L: Apply a non-permanent locking agent.
LG: Apply liquid gasket.
M: Apply molybdenum disulfide grease.
MO: Apply molybdenum disulfide oil solution.
...