Yamaha MXT9L 2019 Manual page 83

Drive chain slack:
5.0–15.0 mm (0.20–0.59 in)
4. 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. If the drive
chain slack is more than 50.0
mm (1.97 in), the chain can dam-
age the frame, swingarm, and
other parts. To prevent this from
occurring, keep the drive chain
slack within the specified limits.
[ECA17791]
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.
Periodic maintenance and adjustment
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
EAU74260
wheel forward.
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.
7-25
2
1. Drive chain slack adjusting bolt
2. Drive chain puller
3. Alignment mark
3. Tighten the axle nut, then the lock-
nuts to their specified torques.
Tightening torques:
Axle nut:
150 N·m (15 kgf·m, 111 lb·ft)
Locknut:
16 N·m (1.6 kgf·m, 12 lb·ft)
4. Make sure that the drive chain
pullers are in the same position,
the drive chain slack is correct,
and
smoothly.
2 1
(a)
(b)
3
the drive chain moves
7