Yamaha WR125R Owner's Manual page 58

PERIODIC MAINTENANCE AND ADJUSTMENT
1. Drive chain slack
4. If the drive chain slack is incorrect,
adjust it as follows.
To adjust the drive chain slack
6
1. Loosen the axle nut, then loosen
the locknut at each end of the
swingarm.
2. To tighten the drive chain, turn the
drive chain slack adjusting nut at
each end of the swingarm in direc-
tion (a). To loosen the drive chain,
turn the adjusting nut at each end
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
of the motorcycle and can lead
to chain slippage or breakage.
To prevent this from occurring,
keep the drive chain slack with-
in the specified limits.
TIP
Using the alignment marks on each
side of the swingarm, make sure that
both adjusting nuts are in the same po-
sition for proper wheel alignment.
EAU22934
1. Axle nut
2. Drive chain slack adjusting nut
3. Locknut
4. Alignment marks
3. Tighten the locknuts, and then
tighten the axle nut to the specified
torques.
6-22
Tightening torques:
Locknut:
16 Nm (1.6 m·kgf, 11 ft·lbf)
Axle nut:
90 Nm (9.0 m·kgf, 65 ft·lbf)
[ECA10571]