Honda CRF125F 2021 Owner's Manual page 95

Installation:
1. Reverse the removal procedure. Make
sure that the lug (1) on the swingarm is
located in the slot (2) in the brake panel.
Tighten the axle nut to:
62 N·m (6.3 kgf·m, 46 lbf·ft)
2. Adjust the drive chain (pages 78 – 79).
3. Adjust the rear brake (page 26).
4. Apply the brake several times and check
for free wheel rotation after the brake
pedal is released.
If a torque wrench is not used for
installation, see your dealer as soon as
possible to verify proper assembly.
Improper assembly may lead to loss of
braking capacity.
(1) Lug
(1)
(2)
(2) Slot
85