Bleeding Rear Brake - Buell XB9S 2003 Manual

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Bleeding Rear Brake

NOTE
Hydraulic brake fluid bladder-type pressure equipment can be
used to fill the brake master cylinder through the bleeder
valve if master cylinder reservoir cover is removed to prevent
pressurization.
8348
Figure 1-9. Rear Caliper Bleeder Valve
1. See Figure 1-9. With motorcycle in upright position,
install end of plastic tubing over rear caliper bleeder
valve; place other end in a clean container.
CAUTION
Cover molded-in-color surfaces and use care when
removing brake reservoir cover and adding D.O.T. 4
brake fluid. Spilling D.O.T. 4 brake fluid on molded-in-
color surfaces will result in cosmetic damage.
9956
Figure 1-10. Rear Master Cylinder Reservoir
2. See Figure 1-10. Remove cap and gasket from rear mas-
ter cylinder reservoir.
3. Add D.O.T. 4 BRAKE FLUID to master cylinder reservoir
with motorcycle upright (not on sidestand). Bring fluid
level between upper and lower marks on reservoir.
NOTE
Do not reuse brake fluid.
4. Slowly depress and release brake pedal several times to
build up hydraulic pressure, then hold brake pedal in the
depressed position.
5. While holding brake pedal in the depressed position,
open bleeder valve about 1/2-turn counterclockwise.
Brake fluid will flow from bleeder valve and through tub-
ing into clean container. When brake pedal has moved
1/2 to 3/4 of its full range of travel, close bleeder valve
(clockwise). Allow brake pedal to return slowly to its
released position.
6. Repeat steps 5-6 until all air bubbles are purged.
7. Tighten rear caliper bleeder valves (metric) to 36-60 in-
lbs (4-7 Nm).
8. Verify master cylinder fluid level as described in step 4.
9. Install cover on master cylinder reservoir and tighten cap
securely.
2003 Buell XB9S: Maintenance 1-17