Honda CRF70F 2004 Owner's Manual page 109

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.
100
Servicing Your Honda
LEFT SIDE
Worn Sprocket
Teeth
REPLACE
(1) rear axle nut
(2) adjusting nut
(3) adjuster index mark
(4) graduated scale
1.
2.
Adjustment
(1)
(3)
Loosen the rear axle nut ( ).
Turn the adjusting nuts ( ) on the right and
left chain adjusters an equal number of turns
to increase or decrease chain slack.
(2)
(4)
1
2