Installing The Rear Brake Master Cylinder - Yamaha YZF-R125 Service Manual

YamahaR125.COM
EAS22740
INSTALLING THE REAR BRAKE MASTER
CYLINDER
1. Install:
• Copper washers "1"
• Brake hose "2"
• Rear brake light switch "3"
Rear brake light switch
24 Nm (2.4 m·kg, 17 ft·lb)
EWA13530
WARNING
Proper brake hose routing is essential to in-
sure safe vehicle operation. Refer to "CABLE
ROUTING" on page 2-33.
ECA14160
CAUTION:
When installing the brake hose onto the
brake master cylinder, make sure the brake
pipe touches the projection "a" as shown.
2
2. Fill:
• Brake fluid reservoir
(with the specified amount of the recom-
mended brake fluid)
Recommended fluid
DOT 4
EWA13090
WARNING
• Use only the designated brake fluid. Other
brake fluids may cause the rubber seals to
deteriorate, causing leakage and poor
brake performance.
• Refill with the same type of brake fluid that
is already in the system. Mixing brake fluids
may result in a harmful chemical reaction,
leading to poor brake performance.
• When refilling, be careful that water does
not enter the brake fluid reservoir. Water
will significantly lower the boiling point of
the brake fluid and could cause vapor lock.
New
3
New
1
a
ECA13540
CAUTION:
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean up
any spilt brake fluid immediately.
3. Bleed:
• Brake system
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-20.
4. Check:
• Brake fluid level
Below the minimum level mark "a" → Add the
recommended brake fluid to the proper level.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-18.
5. Check:
• Brake pedal operation
Soft or spongy feeling → Bleed the brake sys-
tem.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-20.
6. Adjust:
• Brake pedal position
Refer to "ADJUSTING THE REAR DISC
BRAKE" on page 3-18.
Brake pedal position
47.9 mm (1.89 in)
4-38
REAR BRAKE
a