Yamaha XSR125 Owner's Manual page 65

Drive chain slack:
30.0–40.0 mm (1.18–1.57 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. To prevent
this from occurring, keep the
drive chain slack within the
specified limits.
[ECA10572]
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
ZAUM2042
1. Drive chain slack adjusting bolt
2. Axle nut
3. Alignment marks
4. Locknut
2. To tighten the drive chain, turn the
EAU3431B
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 each
side of the swingarm, make sure that
both drive chain pullers are in the same
position for proper wheel alignment.
3. Tighten the axle nut, then the lock-
1
2 3 4
4. Make sure that the drive chain
6-24
nuts to their specified torques.
Tightening torques:
Axle nut:
85 N·m (8.5 kgf·m, 63 lb·ft)
Locknut:
15 N·m (1.5 kgf·m, 11 lb·ft)
pullers are in the same position,
the drive chain slack is correct,
and the drive chain
smoothly.
moves
6