Yamaha YZ85M 2021 Owner's Manual page 61

Periodic maintenance and adjustment
To adjust the drive chain slack
Consult a Yamaha dealer before ad-
justing the drive chain slack.
1. Loosen the axle nut and the lock-
nut on each side of the swingarm.
1
1. Axle nut
2. Locknut
2. To tighten the drive chain, turn the
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.
1. Drive chain slack adjusting bolt
EAU84060
2
1
(a)
(b)
TIP
Using the alignment marks on the drive
chain pullers and the notch on each
side of the swingarm, make sure that
both drive chain pullers are in the same
position for proper wheel alignment.
1
1. Notch
2. Alignment mark
3. Drive chain puller
3. Tighten both locknuts and the axle
nut to the specified torques.
Tightening torques:
Locknut:
21 N·m (2.1 kgf·m, 15 lb·ft)
Axle nut:
80 N·m (8.0 kgf·m, 59 lb·ft)
4. Make sure that the drive chain
pullers are in the same position,
the drive chain slack is correct,
and the
smoothly.
7-22
2
3
drive chain moves
7