Replace any damaged gears or gears with excessively worn dogs or dog holes.

Shift Fork Guide Pin/Drum Groove Wear InspectionMultifunction Meter
A. Multifunction Display
Odometer
Trip Meters
Current Mileage
Average Mileage
Fuel consumption
Stop Watch
B. Speedometer
C. Gear Position Indicator
D. Power Mode Indicator
E. S-KTRC Mode Indicator
F. Warning Symbols
G. Lap Counter/Coolant /
Intake Air Temperature
Meter
...
Engine Sprocket Removal
Remove:
Engine Sprocket Cover Bolts [A]
Engine Sprocket Cover [B]
Flatten out the bended washer [A].
Remove the engine sprocket nut [B] and washer.
NOTE
When loosening the engine sprocket nut, hold the rear
brake on.
Raise the rear wheel off the ground with the stand. ...
Lower Crankcase Assembly
Install the ball bearing [A] and the oil level inspection window
[B] until they are bottomed
Apply soap and water solution to the oil level inspection
window before installation.
Install the new circlip [C].
Apply a non-permanent locking agent to the oil passage
plug [D].
Tighten: ...