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 InspectionShift Drum Assembly
Press and insert the ball bearing [A] on the shift drum [B]
until it is bottomed.
Install:
Ball Bearing [C]
Dowel Pin [D] and Shift Drum Cam [E]
Align the pin with the groove in the shift drum cam.
Apply a non-permanent locking agent to the shift drum
cam holder bolt [F].
Tight ...
Radiator and Radiator Fan Removal
Remove:
Upper Fairing Assembly (see Upper Fairing Assembly
Removal in the Frame chapter)
Coolant (Drain, see Coolant Change in the Periodic
Maintenance chapter)
Air Cleaner Housing (see Air Cleaner Housing Removal
in the Fuel System (DFI) chapter)
Coolant Reserve Tank (see Coolant R ...
Exploded View
7. US, CA and CAL Models
8. Immobilizer System Equipped Models
9. ZX1000JD/KD
AD: Apply adhesive.
L: Apply a non-permanent locking agent.
R: Replacement Parts
13. Other than US, CA and CAL Models
CL: Apply cable lubricant.
EO: Apply engine oil.
G: Apply grease.
L: Apply a ...