Yamaha YBR250, Owner'S Manual

Page: 53 / 80

PERIODIC MAINTENANCE AND ADJUSTMENT
6-20
6
4. If the drive chain slack is incorrect,
adjust it as follows.
EAU22822
To adjust the drive chain slack
1. Loosen the brake pedal free play
adjusting nut, axle nut, and 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.
[ECA10571]
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.
3. Tighten both locknuts and the axle
nut to the specified torques.
4. Adjust the brake pedal free play.
(See page 6-16.)
WARNING
EWA10660
After adjusting the brake pedal free
play, check the operation of the
brake light.
1. Drive chain slack
1
1. Axle nut
2. Drive chain slack adjusting nut
3. Locknut
4. Alignment marks
Tightening torques:
Locknut:
16 Nm (1.6 m·kgf, 12 ft·lbf)
Axle nut:
104 Nm (10.4 m·kgf, 77 ft·lbf)
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