Assembling The Rear Brake Master Cylinder; Installing The Rear Brake Master Cylinder - Yamaha YZ450F Owner's Service Manual

ASSEMBLING THE REAR BRAKE MASTER
EASB111158
CYLINDER
EWA
WARNING
• Before installation, all internal brake com-
ponents should be cleaned and lubricated
with clean or new brake fluid.
• Never use solvents on internal brake com-
ponents.
Specified brake fluid
DOT 4
1. Wash the brake master cylinder and the
brake master cylinder kit with brake fluid.
2. Install:
• Primary cylinder cup "1"
• Secondary cylinder cup "2"
Install to the brake master cylinder piston
"3".
EWA
WARNING
Apply brake fluid to the cylinder cups and
install them as shown. Wrong orientation in
installation causes poor braking perfor-
mance.
1
1
3. Install:
• Spring "1"
Install to the brake master cylinder piston
"2".
TIP
Install the spring with a smaller inside diameter
to the brake master cylinder piston.
2
3
2
3
4-30
1
4. Install:
• Master cylinder kit "1"
• Push rod "2"
• Circlip "3"
New
• Dust boot "4"
TIP
• Before installation, apply brake fluid to the
brake master cylinder kit.
• Before installation, apply silicone grease to
the push rod end.
• Use circlip pliers to install the circlip.
INSTALLING THE REAR BRAKE MASTER EASB111159
CYLINDER
1. Install:
• Copper washers
New
• Brake hose
• Union bolt
Brake hose union bolt
30 Nm (3.0 m·kgf, 22 ft·lbf)
EWA
WARNING
Proper brake hose routing is essential to in-
sure safe vehicle operation.
ECA
NOTICE
Make sure that the pipe portion of the brake
hose touches the projection "a" on the
brake caliper.
REAR BRAKE
2
New
3
New New
1
4
2