Checking The Rear Brake Pads; Bleeding The Hydraulic Brake System - Yamaha 2009 YZF-R1 (Y) Service Manual

EWA13070
WARNING
After adjusting the brake pedal position,
check that the end of the adjusting bolt "c"
is visible through the hole "d".
c. Tighten the locknut "1" to specification.
Locknut
16 Nm (1.6 m·kgf, 11 ft·lbf)
EWA13050
WARNING
A soft or spongy feeling in the brake lever
can indicate the presence of air in the brake
system. Before the vehicle is operated, the
air must be removed by bleeding the brake
system. Air in the brake system will consid-
erably reduce braking performance.
ECA13510
After adjusting the brake pedal position,
make sure there is no brake drag.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Adjust:
• Rear brake light switch
Refer to "ADJUSTING THE REAR
BRAKE LIGHT SWITCH" on page 3-33.
EAS21260

CHECKING THE REAR BRAKE PADS

The following procedure applies to all of the
brake pads.
1. Operate the brake.
2. Check:
• Rear brake pad
Wear indicators "1" almost touch the
brake disc → Replace the brake pads as
a set.
Refer to "REAR BRAKE" on page 4-43.
PERIODIC MAINTENANCE
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.
TIP
• 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.
b. Install the brake fluid reservoir diaphragm.
c. Connect a clear plastic hose "1" tightly to
the bleed screw "2".
3-17