Removing The Rear Brake Master Cylinder; Checking The Rear Brake Master Cylinder - Yamaha WR250R Service Manual

BLE ROUTING" on page 2-30.
ECA14170
CAUTION:
When installing the brake hose onto the
brake caliper "1", make sure the brake pipe
"a" touches the projection "b" on the brake
caliper.
a
3. Install:
Brake pad springs
G
Brake pads
G
Brake caliper support bolt
G
Pin plug
G
Refer to "REPLACING THE REAR BRAKE
PADS" on page 4-28.
Brake caliper support bolt
17 Nm (1.7 m•kg, 12 ft•lb)
4. Fill:
Brake fluid reservoir
G
(with the specified amount of the recom-
mended brake fluid)
Recommended fluid
DOT 4
EWA13090
WARNING
Use only the designated brake fluid. Other
G
brake fluids may cause the rubber seals to
deteriorate, causing leakage and poor
brake performance.
Refill with the same type of brake fluid that
G
is already in the system. Mixing brake flu-
ids may result in a harmful chemical reac-
tion, leading to poor brake performance.
When refilling, be careful that water does
G
not enter the brake fluid reservoir. Water
will significantly lower the boiling point of
the brake fluid and could cause vapor lock.
ECA13540
CAUTION:
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean up
any spilt brake fluid immediately.
5. Bleed:
6. Check:
1
7. Check:
EAS22700
REMOVING THE REAR BRAKE MASTER
CYLINDER
NOTE:
Before removing the rear brake master cylinder,
drain the brake fluid from the entire brake sys-
tem.
1. Remove:
NOTE:
To collect any remaining brake fluid, place a
container under the master cylinder and the end
of the brake hose.
EAS22710
CHECKING THE REAR BRAKE MASTER
CYLINDER
1. Check:
4-31
Brake system
G
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 1-25.
Brake fluid level
G
Below the minimum level mark "a" → Add the
recommended brake fluid to the proper level.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 1-23.
a
Brake pedal operation
G
Soft or spongy feeling → Bleed the brake
system.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 1-25.
Union bolt
G
Copper washers
G
Brake hose
G
Brake master cylinder "1"
G
Damage/scratches/wear → Replace.
Brake fluid delivery passages "2"
G
(brake master cylinder body)
REAR BRAKE