Yamaha YXR660FAS Service Manual download pdf (Page 108)

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CHK

ADJ

BLEEDING THE HYDRAULIC BRAKE SYSTEM

1. Bleed:

• brake system

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a. Add the 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 hose 1 tightly to

the caliper bleed screw 2.

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Front

É

Rear

d. Place the other end of the hose into a con-

tainer.

e. Slowly apply the brake pedal several times.

f. Push down on the pedal and hold it.

g. Loosen the bleed screw and allow the pedal

to travel towards its limit.

h. Tighten the bleed screw when the pedal

limit has been reached, then release the

pedal.

i. Repeat steps (e) to (h) until all the air bub-

bles have disappeared from the fluid.

j. Tighten the bleed screw.

NOTE:

If bleeding is difficult, it may be necessary to

let the brake fluid settle for a few hours.

Repeat the bleeding procedure when the tiny

bubbles in the system have disappeared.

k. Add brake fluid to the proper level.

Refer to “CHECKING THE BRAKE FLUID

LEVEL”.

WARNING

Check the operation of the brake after

bleeding the brake system.

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T

R

.

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Front brake caliper bleed screw

6 Nm (0.6 m · kg, 4.3 ft · lb)

Rear brake caliper bleed screw

5 Nm (0.5 m · kg, 3.6 ft · lb)

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