Checking The Front Brake Master Cylinder; Assembling The Front Brake Master Cylinder; Installing The Front Brake Master Cylinder - Yamaha YFM70RY Service Manual

4. Check:
• Brake fluid level
Below the minimum level mark → Add the
recommended brake fluid to the proper level.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-21.
5. Check:
• Brake lever operation
Soft or spongy feeling → Bleed the brake sys-
tem.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-24.
EAS22500
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. Check:
• Brake master cylinder kit
Damage/scratches/wear → Replace.
3. Check:
• Brake master cylinder reservoir "1"
Cracks/damage → Replace.
• Brake master cylinder reservoir diaphragm
"2"
Damage/wear → Replace.
4. Check:
• Brake hoses
Cracks/damage/wear → Replace.
EAS22520
ASSEMBLING THE FRONT BRAKE MASTER
CYLINDER
EWA1S3L007
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.
• Whenever a master cylinder is disassem-
bled, replace the brake master cylinder kit.
Recommended fluid
DOT 4
EAS22530
INSTALLING THE FRONT BRAKE MASTER
CYLINDER
1. Install:
• Brake master cylinder "1"
Brake master cylinder bracket
bolt
7 Nm (0.7 m·kg, 5.1 ft·lb)
TIP
• Install the brake master cylinder holder with the
"UP" mark facing up.
• First, tighten the upper bolt, then the lower bolt.
4-26
FRONT BRAKES