Honda CRF50F 2009 Owner's Manual page 112

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.
104
Servicing Your Honda
LEFT SIDE
Worn Sprocket
Teeth
REPLACE
(1) rear axle nut
(2) lock nut
(3) adjusting nut
1.
2.
Adjustment
(4)
(1)
(3)
Loosen the rear axle nut ( ).
Loosen the lock nuts ( ) on both sides of the
swingarm.
(5)
(2)
(4) adjuster index mark
(5) graduated scale
1
2