Checking The Rear Brake Caliper; Assembling The Rear Brake Caliper; Installing The Rear Brake Caliper - Yamaha WR250R Service Manual

EWA13550
WARNING
Cover the brake caliper piston with a rag.
G
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-
G
ton.
b. Remove the brake caliper dust seals brake
caliper piston seals.
LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
EAS22640

CHECKING THE REAR BRAKE CALIPER

Recommended brake component
replacement schedule
Brake pads
Piston seals
Brake hoses
Brake fluid
1. Check:
Brake caliper pistons "1"
G
Rust/scratches/wear → Replace the brake
caliper pistons.
Brake caliper cylinders "2"
G
Scratches/wear → Replace the brake caliper
assembly.
Brake caliper body "3"
G
Cracks/damage → Replace the brake caliper
assembly.
Brake fluid delivery passages
G
(brake caliper body)
Obstruction → Blow out with compressed air.
If necessary
Every two years
Every four years
Every two years and
whenever the brake is dis-
assembled
3
EWA13610
WARNING
Whenever a brake caliper is disassembled,
replace the brake caliper piston seals.
2. Check:
Brake caliper brackets
G
Cracks/damage → Replace.
EAS22650

ASSEMBLING THE REAR BRAKE CALIPER

EWA13620
WARNING
Before installation, all internal brake com-
G
ponents should be cleaned and lubricated
with clean or new brake fluid.
Never use solvents on internal brake com-
G
ponents as they will cause the piston seals
to swell and distort.
Whenever a brake caliper is disassembled,
G
replace the brake caliper piston seals.
Recommended fluid
DOT 4
EAS22670

INSTALLING THE REAR BRAKE CALIPER

1. Install:
Rear brake caliper
G
Rear brake caliper bracket
G
2. Install:
Rear wheel
G
Refer to "REAR WHEEL" on page 4-7.
Brake hose
G
Union bolt
G
Union bolt
30 Nm (30. m•kg, 22 ft•lb)
EWA13530
WARNING
Proper brake hose routing is essential to in-
sure safe vehicle operation. Refer to "CA-
4-30
REAR BRAKE
2
1