Disassembling The Rear Brake Caliper; Checking The Rear Brake Caliper - Yamaha YZF-R125 Service Manual

YamahaR125.COM
1. Remove:
• Union bolt "1"
• Copper washers "2"
• Brake hose "3"
2
NOTE:
Put the end of the brake hose into a container
and pump out the brake fluid carefully.
EAS22600
DISASSEMBLING THE REAR BRAKE
CALIPER
1. Remove:
• Brake caliper piston "1"
• Brake caliper piston dust seal "2"
• Brake caliper piston seal "3"
M MMM M MMM M M MMM M
a. Blow compressed air into the brake hose joint
opening "a" 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.
3
1
3
2
1
M MMM M M MMM M M MMM M
b. Remove the brake caliper piston seal and
dust seal.
L LLL L LLL L
EAS22640

CHECKING THE REAR BRAKE CALIPER

Recommended brake component
Brake pads
Piston seal
Piston dust 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 caliper
assembly.
• Brake caliper body "3"
Cracks/damage → Replace the brake caliper
MMM
assembly.
• Brake fluid delivery passages
(brake caliper body)
Obstruction → Blow out with compressed air.
4-35
REAR BRAKE
a
L LLL L L LLL L L LLL L
replacement schedule
If necessary
Every two years
Every two years
Every four years
Every two years and
whenever the brake
is disassembled
2
L LLL L LLL
3
1