Yamaha WR250X Owner's Manual page 70

PERIODIC MAINTENANCE AND ADJUSTMENT
3
1
2
3
1. Drive chain slack
4
2. Chain support mounting bolt
3. Chain tensioner
5
5. If the drive chain slack is incorrect,
adjust it as follows.
6
To adjust the drive chain slack
7
Consult a Yamaha dealer before ad-
justing the drive chain slack.
8
1. Loosen the axle nut and the lock-
nut on each side of the swingarm.
9
2. To tighten the drive chain, turn the
drive chain slack adjusting bolt on
each side of the swingarm in direc-
tion (a). To loosen the drive chain,
turn the adjusting bolt on each side
of the swingarm in direction (b),
and then push the rear wheel for-
ward. NOTICE: Improper drive
chain slack will overload the en-
gine as well as other vital parts
1
of the motorcycle and can lead
to chain slippage or breakage.
To prevent this from occurring,
keep the drive chain slack with-
2
in the specified limits.
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
EAU34318
5
4
1. Axle nut
2. Locknut
3. Drive chain slack adjusting bolt
4. Alignment marks
5. Drive chain puller
[ECA10572]
(a)
(b)
2
3
6-28
3. Tighten the axle nut, then the lock-
nuts to their specified torques.
Tightening torques:
Axle nut:
125 Nm (12.5 m·kgf, 90 ft·lbf)
Locknut:
16 Nm (1.6 m·kgf, 12 ft·lbf)
4. Make sure that the drive chain pull-
ers are in the same position, the
drive chain slack is correct, and
the drive chain moves smoothly.