Adjusting The Drive Chain Slack - Yamaha YZF-R15 Service Manual

f. Fully pull the brake lever or fully press down
the brake pedal and hold it in position.
g. Loosen the bleed screw.
NOTE:
Loosening the bleed screw will release the pres-
sure and cause the brake lever to contact the
throttle grip or the brake pedal to fully extend.
h. Tighten the bleed screw and then release the
brake lever or brake pedal.
i. Repeat steps (e) to (h) until all of the air bub-
bles have disappeared from the brake fluid in
the plastic hose.
j. Tighten the bleed screw to specification.
Front brake caliper bleed screw
6 Nm (0.6 m · kg, 4.5 ft ·lb)
Rear brake caliper bleed screw
6 Nm (0.6 m · kg, 4.5 ft ·lb)
k. Fill the brake fluid reservoir to the proper level
with the recommended brake fluid.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-17.
WARNING
After bleeding the hydraulic brake system,
check the brake operation.
ssssssssssssssssssssssss

ADJUSTING THE DRIVE CHAIN SLACK

NOTE:
The drive chain slack must be checked at the
tightest point on the chain.
CAUTION:
A drive chain that is too tight will overload
the engine and other vital parts, and one that
is too loose can skip and damage the swing-
arm or cause an accident. Therefore, keep
the drive chain slack within the specified lim-
its.
1. Stand the vehicle on a level surface.
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
NOTE:
Place the vehicle on the centerstand so that the
rear wheel is elevated.
2. Spin the rear wheel several times and find the
tightest position of drive chain.
3. Check:
Drive chain slack "a"
l
Out of specification → Adjust.
Drive chain slack
20–40 mm
NOTE:
Measure the drive chain slack halfway between
the drive axle and the rear wheel axle.
4. Adjust:
Drive chain slack
l
s s s s s s s s s s s s s s s s s s s s s s s s
a. Loosen the wheel axle nut "4"
b. Turn the drive chain adjusting plate "5" in di-
rection "a" or "b" until the specified drive chain
slack is obtained.
Direction "a"
Drive chain is tightened.
Direction "b"
Drive chain is loosened.
b
NOTE:
To maintain the proper wheel alignment, adjust
both sides evenly.
f. Tighten the wheel axle nut.
3-20
CHASSIS
a
2
1