Installing The Brake Caliper Piston; Installing The Rear Brake Caliper - Yamaha YZ450FX 2019 Owner's Service Manual

Specified brake fluid
DOT 4
EAM30046

INSTALLING THE BRAKE CALIPER PISTON

1. Clean:
• Brake caliper
• Brake caliper piston seal
• Brake caliper piston dust seal
• Brake caliper piston
Use brake fluid for cleaning.
2. Install:
• Brake caliper piston seal "1"
• Brake caliper piston dust seal "2"
EWA19290
WARNING
Always use new brake caliper piston seal
and brake caliper piston dust seal.
TIP
• Apply the silicone grease on the brake caliper
piston seal and brake caliper piston dust seal.
• Fit the brake caliper piston seals and brake cal-
iper piston dust seals onto the slot on brake
caliper correctly.
S
3. Install:
• Brake caliper piston "1"
TIP
Apply the brake fluid on the piston outer surface.
ECA24480
NOTICE
• Install the piston with its side "a" facing the
brake caliper.
• Never force to insert.
EAM30047

INSTALLING THE REAR BRAKE CALIPER

1. Install:
New
• Rear brake caliper
New
• Rear brake caliper bracket
2. Install:
• Rear wheel
• Copper washer
• Brake hose
• Union bolt
EWA13531
Proper brake hose routing is essential to in-
sure safe vehicle operation.
2
ECA24490
NOTICE
Make sure that a bend in its pipe portion "a"
1
is directed as shown and the brake hose
S
touches the projection "b" on the brake cali-
per.
3. Install:
• Brake pad spring
• Brake pad
• Brake pad pin
• Brake pad pin plug
4-29
REAR BRAKE
BF
Refer to "REAR WHEEL" on page 4-9.
New
Brake hose union bolt
30 N·m (3.0 kgf·m, 22 lb·ft)
WARNING
b
1
1
a
b
a