Yamaha YZ450FA Automobile User Manual


 
5-15
FRONT BRAKE AND REAR BRAKE
CHECKING THE BRAKE CALIPER
1. Inspect:
• Brake caliper cylinder inner surface "a"
Wear/score marks Replace brake caliper
assembly.
A. Front
B. Rear
2. Inspect:
• Brake caliper piston "1"
Wear/score marks Replace brake caliper
piston assembly.
Replace the brake caliper piston seals and
brake caliper piston dust seals "2" whenev-
er a caliper is disassembled.
CHECKING THE BRAKE HOSE
1. Inspect:
• Brake hose "1"
Crack/damage Replace.
HANDLING NOTE
All internal parts should be cleaned in new
brake fluid only.
• Internal parts should be lubricated with
brake fluid when installed.
Replace the brake caliper piston seals and
brake caliper piston dust seals whenever a
caliper is disassembled.
INSTALLING THE BRAKE CALIPER PISTON
1. Clean:
• Brake caliper
• Brake caliper piston seal
• Brake caliper piston dust seal
• Brake caliper piston
Clean them with brake fluid.
2. Install:
• Brake caliper piston seal "1"
• Brake caliper piston dust seal "2"
Always use new brake caliper piston seals
and brake caliper piston dust seals.
• Apply the brake fluid on the brake caliper pis-
ton seal.
Apply the silicone grease on the brake caliper
piston dust seal.
• Fit the brake caliper piston seals and brake
caliper piston dust seals onto the slot on
brake caliper correctly.