Disassembling The Front Brake Caliper; Checking The Front Brake Caliper - Yamaha 2009 YFM25RY Service Manual

TIP
Before removing 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 bolts "4"
TIP
Put the end of the brake hose into a container
and pump out the brake fluid carefully.
EAS22310
DISASSEMBLING THE FRONT BRAKE
CALIPER
1. Remove:
• Brake caliper piston
• Brake caliper dust seal "1"
• Brake caliper piston seal "2"
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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.
b. Remove the brake caliper piston seal and
brake caliper dust seal.
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EAS22370

CHECKING THE FRONT BRAKE CALIPER

Recommended brake component replace-
ment schedule
Brake pads
Piston seals
Brake hose
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 passage
(brake caliper body)
Obstruction → Blow out with compressed
air.
4-22
FRONT BRAKE
If necessary
Every two years
Every four years
Every two years and
whenever the brake is
disassembled