Bleeding Rear Brake; Brake Pedal Adjustment - Buell 2009 XB Series Service 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 pres-
surization.
1. See Figure 1-11. Remove rubber cap and install end of
plastic tubing over rear caliper bleeder valve. Place other
end of tubing in a clean container.
D.O.T. 4 brake fluid will damage painted and body panel
surfaces it comes in contact with. Always use caution and
protect surfaces from spills whenever brake work is per-
formed. Failure to comply can result in cosmetic damage.
(00239b)
NOTE
On Ulysses models it will be necessary to remove the right
side air flow guide.
2. Remove seat.
3. See Figure 1-12. Unscrew cap from rear master cylinder
reservoir.
4. Repeat the following until all air bubbles are purged and
only brake fluid flows from the plastic tubing.
a. 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.
Do not reuse brake fluid.
b. Slowly press and release brake pedal several times
to build up hydraulic pressure, then hold brake pedal
in the pressed position.
c. While holding brake pedal in the pressed position,
open bleeder valve about 1/2-turn counterclockwise.
Brake fluid will flow from bleeder valve and through
tubing into clean container.
d. 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.
5. Tighten rear caliper bleeder valve (metric) to 36-60 in-lbs
(4-7 Nm) and replace rubber cap on valve.
6. Verify brake fluid level is between the upper and lower
lines on the side of the reservoir.
7. Thread cap on reservoir and tighten securely.
8. Check that the brake pedal feels firm when pressed.
Repeat bleeding procedure as necessary.
After installing seat, pull upward on seat to be sure it is
locked in position. While riding, a loose seat can shift
causing loss of control, which could result in death or
serious injury. (00070b)
1-20 2009 XB Service: Maintenance
NOTE
9. Install seat, if removed.
sm00488
Figure 1-11. Rear Caliper Bleeder Valve
pd00239
Figure 1-12. Rear Master Cylinder Reservoir: Ulysses

BRAKE PEDAL ADJUSTMENT

After repairing the brake system, test brakes at low speed.
If brakes are not operating properly, testing at high speeds
can cause loss of control, which could result in death or
serious injury. (00289a)
Check rear brake pedal operation:
Before every ride.