Removing The Rear Brake Caliper; Checking The Rear Brake Caliper - Yamaha YZF-R1(B) 2012 Service Manual

7. Check:
• Brake pedal operation
Soft or spongy feeling → Bleed the brake
system.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-17.
EAS22590

REMOVING THE REAR BRAKE CALIPER

TIP
Before disassembling the brake caliper, drain
the brake fluid from the entire brake system.
1. Remove:
• Union bolt "1"
• Copper washers "2"
• Brake hose "3"
• Brake caliper "4"
TIP
Put the end of the brake hose into a container
and pump out the brake fluid carefully.
EAS22600
DISASSEMBLING THE REAR BRAKE CALI-
PER
1. Remove:
• Brake caliper piston "1"
• Brake caliper piston dust seal "2"
• Brake caliper piston seal "3"
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a. Secure the brake caliper position with a
piece of wood "a".
b. Blow compressed air into the brake hose
joint opening "b" to force out the piston from
the brake caliper.
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.
c. Remove the brake caliper piston dust seal
and brake caliper piston seal.
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EAS22640

CHECKING THE REAR BRAKE CALIPER

Recommended brake component
replacement schedule
Brake pads
Piston dust seal and
piston seal
Brake hoses
Brake fluid
1. Check:
• Brake caliper piston "1"
Rust/scratches/wear → Replace the
brake caliper piston.
• Brake caliper cylinder "2"
Scratches/wear → Replace the brake cal-
iper assembly.
• Brake caliper body "3"
Cracks/damage → Replace the brake
caliper assembly.
• Brake fluid delivery passages
(brake caliper body)
Obstruction → Blow out with compressed
air.
4-51
REAR BRAKE
If necessary
Every two years
Every four years
Every two years and
whenever the brake is
disassembled