Yamaha YZFR3AN 2021 Owner's Manual page 73

1. Locknut
2. Drive chain puller cap
2. To tighten the drive chain, turn the
drive chain slack adjusting nut on
each side of the swingarm in di-
rection (a). To loosen the drive
chain, turn the adjusting nut on
each side of the swingarm in di-
rection (b), and then push the rear
wheel forward.
Periodic maintenance and adjustment
1
2
1. Drive chain slack adjusting nut
TIP
Using the alignment marks on each
side of the swingarm, make sure that
both drive chain pullers are in the same
position for proper wheel alignment.
1. Alignment marks
2. Drive chain puller
7-27
3. Tighten the axle nut, then the lock-
nuts to their specified torques.
1
Tightening torques:
(a)
Axle nut:
57 N·m (5.7 kgf·m, 42 lb·ft)
Locknut:
16 N·m (1.6 kgf·m, 12 lb·ft)
(b)
4. Make sure that the drive chain
pullers are in the same position,
the drive chain slack is correct,
and
smoothly.
5. Install the drive chain puller caps.
2
1
the drive chain moves
7