Bleeding The Hydraulic Brake System - Yamaha YZF-R1 2007 Service Manual

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a. Hold the main body "1" of the rear brake
light switch so that it does not rotate and
turn the adjusting nut "2" in direction "a" or
"b" until the rear brake light comes on at the
proper time.
Direction "a"
Brake light comes on sooner.
Direction "b"
Brake light comes on later.
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EAS21360
BLEEDING THE HYDRAULIC BRAKE SYS-
TEM
EWA13100
WARNING
Bleed the hydraulic brake system when-
ever:
• The system is disassembled.
• A brake hose is loosened, disconnected
or replaced.
• The brake fluid level is very low.
• Brake operation is faulty.
NOTE:
• Be careful not to spill any brake fluid or allow
the brake fluid reservoir to overflow.
• When bleeding the hydraulic brake system,
make sure there is always enough brake fluid
before applying the brake. Ignoring this pre-
caution could allow air to enter the hydraulic
brake system, considerably lengthening the
bleeding procedure.
• 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 hose have disappeared.
1. Bleed:
• Hydraulic brake system
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a. Fill the brake fluid reservoir to the proper
level with the recommended brake fluid.
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b. Install the brake fluid reservoir diaphragm.
c. Connect a clear plastic hose "1" tightly to
the bleed screw "2".
A. Front brake master cylinder
B. Front brake caliper
C. Rear brake caliper
NOTE:
Bleeding order of the front hydraulic brake sys-
tem is the following order:
• Front brake master cylinder
• Front brake calipers
• Front brake master cylinder
d. Place the other end of the hose into a con-
tainer.
e. Slowly apply the brake several times.
f. Fully pull the brake lever or fully press
down the brake pedal and hold it in posi-
tion.
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CHASSIS