7-23
Periodic maintenance and adjustment
7
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 , the
chain can damage the frame,
swingarm, and other parts. To
prevent this from occurring,
keep the drive chain slack with-
in the specified limits.
[ECA17791]
EAU62983
To adjust the drive chain slack
Consult a Yamaha dealer before ad-
justing the drive chain slack.
1. Remove the drive chain puller cap,
and then loosen the axle nut and
the locknut on each side of the
swingarm.
2. To tighten the drive chain, turn the
drive chain slack adjusting nut on
each side of the swingarm in di-
rection (a). To loosen the drive
chain, turn the adjusting nut on
each side of the swingarm in di-
rection (b), and then push the rear
wheel forward.
Drive chain slack:
35.0–45.0 mm (1.38–1.77 in)
1. Axle nut
2. Locknut
3. Drive chain puller cap
2
3
1
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.
1. Drive chain slack adjusting nut
1. Alignment marks
2. Drive chain puller
1
(a)
(b)
1
2
Summary of Contents for MT-25
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