Yamaha WR450FN 2022, Owner'S Service Manual

Page: 153 / 402

FRONT BRAKE
4-25
TIP
Install the spring with a smaller inside diameter
to the brake master cylinder piston.
4. Install:
•
Brake master cylinder piston assembly “1”
• Washer “2”
•
Circlip “3”
•
Dust boot “4”
•
Push rod “5”
TIP
•
Always install new brake master cylinder kit
“6”.
•
Before installation, apply brake fluid to the
components of the brake master cylinder pis-
ton assembly.
• Before installation, apply silicone grease to the
push rod end.
• Before installation, apply brake fluid to the in-
side of the brake master cylinder.
EAM30039
INSTALLING THE FRONT BRAKE MASTER
CYLINDER
1. Install:
• Brake master cylinder “1”
TIP
•
Install the front brake master cylinder holder
with the “UP” mark facing up.
•
First, tighten the upper bolt, then the lower bolt.
2. Install:
• Copper washer
•
Brake hose
• Union bolt
WARNING
EWA13531
Proper brake hose routing is essential to in-
sure safe vehicle operation.
NOTICE
ECA24470
During installation, bring the brake hose into
contact with the brake master cylinder pro-
jection “a” and make its bent portion “b”
face downward.
TIP
Turn the handlebar toward right and left to make
sure that the brake hose does not touch other
parts (e.g., wire harness, cables, leads). Adjust
if necessary.
3. Pour brake fluid to the brake master cylinder
reservoir up to the specified level.
Brake master cylinder holder bolt
9 N·m (0.9 kgf·m, 6.6 lb·ft)
1
3
4
2
6 New
5
T
R
.
.
Brake hose union bolt
30 N·m (3.0 kgf·m, 22 lb·ft)
Specified brake fluid
DOT 4
1
UP
Ne w
T
R
.
.
aa
a
b