Checking The Rear Brake Caliper; Assembling The Rear Brake Caliper; Installing The Rear Brake Caliper - Yamaha YZF-R1 Series Service Manual

EWA13550
WARNING
• Cover the brake caliper piston with a rag.
Be careful not to get injured when the pis-
ton is expelled from the brake caliper.
• Never try to pry out the brake caliper pis-
ton.
a
b. Remove the brake caliper piston dust seal
and brake caliper piston seal.
EAS30188

CHECKING THE REAR BRAKE CALIPER

Recommended brake component
replacement schedule
Brake pads
Piston seal
Piston dust seal
Brake hoses
Brake fluid
1. Check:
• Brake caliper piston
Rust/scratches/wear → Replace the brake
caliper piston.
• Brake caliper cylinder
Scratches/wear → Replace the brake caliper
assembly.
• Brake caliper body
Cracks/damage → Replace the brake caliper
assembly.
• Brake fluid delivery passages
(brake caliper body)
Obstruction → Blow out with compressed air.
EWA13601
WARNING
Whenever a brake caliper is disassembled,
replace the brake caliper piston dust seal
and brake caliper piston seal.
If necessary
Every two years
Every two years
Every four years
Every two years and
whenever the brake is
disassembled
4-70
2. Check:
• Rear brake caliper bracket
Cracks/damage → Replace.
Refer to "REAR WHEEL" on page 4-43.
EAS30189

ASSEMBLING THE REAR BRAKE CALIPER

EWA17080
WARNING
• Before installation, all internal brake com-
ponents should be cleaned and lubricated
with clean or new brake fluid.
• Never use solvents on internal brake com-
ponents as they will cause the brake caliper
piston dust seal and brake caliper piston
seal to swell and distort.
• Whenever a brake caliper is disassembled,
replace the brake caliper piston dust seal
and brake caliper piston seal.
Specified brake fluid
DOT 4
EAS30190

INSTALLING THE REAR BRAKE CALIPER

1. Install:
• Rear brake caliper
(temporarily)
• Brake hose gaskets
• Brake hose
• Brake hose union bolt
Rear brake hose union bolt
32 N·m (3.2 kgf·m, 24 lb·ft)
EWA13531
WARNING
Proper brake hose routing is essential to in-
sure safe vehicle operation.
ECA19080
NOTICE
When installing the brake hose onto the
brake caliper "1", make sure the brake pipe
"a" passes between the projections "b" on
the brake caliper.
REAR BRAKE
New