Yamaha YZ85 2021 - Page 60

Periodic maintenance and adjustment
7-21
7
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
drive chain slack within the
specified limits.
[ECA10572]
EAU84060
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.
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.
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.
Distance A:
58.0–68.0 mm (2.28–2.68 in)
(YZ85N)
65.0–75.0 mm (2.56–2.95 in)
(YZ85LWN)
1. Axle nut
2. Locknut
22
1
2
1
1. Drive chain slack adjusting bolt
(b)(b)
(a)(a)
1
(b)
(a)
1
UB4B13E0.book Page 21 Wednesday, August 25, 2021 7:15 AM