Yamaha YZF R1 2021 Owner's Manual page 108

Periodic maintenance and adjustment
2 3
1
5
1. Drive chain puller
2. Axle nut
3. Drive chain slack adjusting bolt
4. Locknut
5. Alignment marks
2. To tighten the drive chain, turn the
8
drive chain slack adjusting bolt on
each side of the swingarm in di-
rection (a). To loosen the drive
chain, turn the adjusting bolt on
each side of the swingarm in di-
rection (b), and then push the rear
wheel forward.
4
1. Drive chain slack adjusting bolt
2. Locknut
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.
3. Tighten the axle nut, then the lock-
nuts to their specified torques.
Tightening torques:
Axle nut:
190 N·m (19 kgf·m, 140 lb·ft)
Locknut:
16 N·m (1.6 kgf·m, 12 lb·ft)
1
(a) 2
(b)
8-28
4. Make sure that the drive chain
pullers are in the same position,
the drive chain slack is correct,
and the drive chain
smoothly.
moves