Honda CRF150F 2005 Owner's Manual page 115

Drive Chain
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.
106
Servicing Your Honda
LEFT REAR
Worn Sprocket
Teeth
REPLACE
RIGHT REAR
(1) axle
(2) axle nut
(3) chain adjusters
(4) index marks
(5) stopper pins
Adjustment
(1)
(5)
(4)
(3)
(4)
(3)
(5)
(2)