Yamaha YZ250N Owner's Service Manual page 164

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CHASSIS/BRAKE SYSTEM AIR BLEEDING
EC360000
CHASSIS
EC361012
BRAKE SYSTEM AIR BLEEDING
w
Bleed the brake system if:
9 The system has been disassembled.
9 A brake hose has been loosened or removed.
9 The brake fluid is very low.
9 The brake operation is faulty.
A dangerous loss of braking performance may
occur if the brake system is not properly bleed.
1. Remove:
9Master cylinder cap
9Diaphragm
9Protector (rear brake)
2. Bleed:
9Brake fluid
Å Front
ı Rear
Air bleeding steps:
a. Add proper brake fluid to the reservoir.
b. Install the diaphragm. Be careful not to
spill any fluid or allow the reservoir to
overflow.
c. Connect the clear plastic tube
the caliper bleed screw 1.
d. Place the other end of the tube into a
container.
e. Slowly apply the brake lever or pedal sev-
eral times.
f. Pull the lever in or push down on the ped-
al. Hold the lever or pedal in position.
g. Loosen the bleed screw and allow the
lever or pedal to travel towards its limit.
h. Tighten the bleed screw when the lever or
pedal limit has been reached; then re-
lease the lever or pedal.
Bleed screw:
6 Nm (0.6 m•kg, 4.3 ft•lb)
i. Repeat steps (e) to (h) until of the air
bubbles have been removed from the
system.
3-17
INSP
ADJ
2 tightly to

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