Honda TRX400X Owner's Manual page 152

Drive Chain
6. Check the chain roller ( ) for wear and replace if necessary.
LEFT SIDE
(4) chain roller
7. 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
Use of a new chain with worn sprockets will cause rapid chain wear.
Servicing Your Honda
144
4
Normal Sprocket Teeth
GOOD
(4)
Worn Sprocket
Teeth
REPLACE