Honda CRF125F 2021 Owner's Manual page 37

Adjust by turning the rear brake adjusting
nut a half-turn at a time. Make sure the cut-
out on the adjusting nut is seated on the
brake arm pin (5) after making final
freeplay adjustment.
4. Apply the brake several times and check
for free wheel rotation after the brake
pedal is released.
If proper adjustment cannot be obtained by
this method, see your dealer.
After adjustment, push the brake arm (6) to
confirm that there is a gap between the rear
brake adjusting nut and the brake arm pin.
(4)
(4) Rear brake adjusting nut
(5) Brake arm pin
After adjustment, confirm the freeplay of
the rear brake pedal.
Other Checks:
Make sure the brake rod, brake arm, spring
and fasteners are in good condition.
(5)
(6)
(6)Brake arm
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