Honda CRF230F 2006 Owner's Manual page 118

6. Inspect the front and rear sprocket teeth for
excessive wear or damage. If necessary, have
your Honda dealer replace a worn sprocket.
Damaged Sprocket
Teeth
REPLACE
Normal Sprocket Teeth
GOOD
Use of a new chain with worn sprockets will
cause rapid chain wear.
Worn Sprocket
Teeth
REPLACE
Drive Chain
Servicing Your Honda
109