Checking The Front Brake Calipers - Yamaha 2009 YZF-R1 (Y) Service Manual

EAS22300
REMOVING THE FRONT BRAKE CALIPERS
The following procedure applies to both of the
brake calipers.
TIP
Before removing the brake caliper, drain the
brake fluid from the entire brake system.
1. Remove:
• Union bolt "1"
• Washers "2"
• Brake hose "3"
TIP
Put the end of the brake hose into a container
and pump out the brake fluid carefully.
EAS22360
DISASSEMBLING THE FRONT BRAKE
CALIPERS
The following procedure applies to both of the
brake calipers.
1. Remove:
• Brake caliper pistons "1"
• Brake caliper piston dust seals "2"
• Brake caliper piston seals "3"
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a. Secure the right side brake caliper pistons
with a piece of wood "a".
b. Blow compressed air into the brake hose
joint opening "b" to force out the left side
pistons from the brake caliper.
EWA14B1002
WARNING
• Never try to pry out the brake caliper pis-
tons.
• Do not loosen the bolts "3".
c. Remove the brake caliper piston dust seals
and brake caliper piston seals.
d. Cover the left piston with a cloth so that air
does not leak from it and repeat the above
procedure (a)–(c), and then push out the
right piston from the brake caliper.
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EAS22390

CHECKING THE FRONT BRAKE CALIPERS

Recommended brake component replace-
ment schedule
Brake pads
Piston dust seals and
piston seals
Brake hoses
Brake fluid
1. Check:
• Brake caliper pistons "1"
Rust/scratches/wear → Replace the
brake caliper pistons.
4-38
FRONT BRAKE
If necessary
Every two years
Every four years
Every two years and
whenever the brake is
disassembled