Removing The Front Brake Master Cylinder; Checking The Front Brake Master Cylinder; Assembling The Front Brake Master Cylinder; Installing The Front Brake Master Cylinder - Yamaha YZF-R15 Service Manual

a
7. Check:
Brake lever operation
Soft or spongy feeling → Bleed the brake sys-
tem.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-18.
REMOVING THE FRONT BRAKE MASTER
CYLINDER
NOTE:
Before removing the front brake master cylinder,
drain the brake fluid from the entire brake sys-
tem.
1. Disconnect:
Front brake light switch"1"
NOTE:
Push the fastener to remove the front brake light
switch from the brake master cylinder.
2. Remove:
Brake hose union bolt
Copper washers
Brake hose
NOTE:
To collect any remaining brake fluid, place a
container under the master cylinder and the end
of the brake hose.
CHECKING THE FRONT BRAKE MASTER
CYLINDER
1. Check:
Brake master cylinder"1"
Damage/scratches/wear → Replace.
Brake fluid delivery passages"2"
(brake master cylinder body)
Obstruction → Blow out with compressed air.
2
2. Check:
Brake master cylinder kit
Damage/scratches/wear → Replace.
3. Check:
Brake master cylinder reservoir
Cracks/damage → Replace.
Brake master cylinder reservoir diaphragm
Damage/wear → Replace.
4. Check:
Brake hose
Cracks/damage/wear → Replace.
ASSEMBLING THE FRONT BRAKE MASTER
CYLINDER
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.
Recommended fluid
DOT 3 or
INSTALLING THE FRONT BRAKE MASTER
CYLINDER
1. Install:
Brake master cylinder"1"
Brake master cylinder holder"2"
Brake master cylinder holder bolt
7 Nm (0.7 m·kg, 5.1 ft·lb)
4-22
FRONT BRAKE
1
DOT 4