Yamaha YZ85 2021 Owner's Manual page 60

Periodic maintenance and adjustment
Distance A:
58.0–68.0 mm (2.28–2.68 in)
(YZ85N)
65.0–75.0 mm (2.56–2.95 in)
(YZ85LWN)
5. If the drive chain slack is incorrect,
adjust it as follows. NOTICE: Im-
proper drive chain slack will
overload the engine as well as
other vital parts of the motorcy-
cle and can lead to chain slip-
page or breakage. To prevent
this from occurring, keep the
7
drive chain slack within the
specified limits.
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. 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
[ECA10572]
chain, turn the adjusting bolt on
EAU84060
each side of the swingarm in di-
rection (b), and then push the rear
wheel forward.
2 2 2
1 1
7-21
1 1
(a) (a) (a)
(b) (b) (b)
1. Drive chain slack adjusting bolt
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.