Bleeding The Hydraulic Brake System (For Yp250R) - Yamaha MBK XMAX 2014 Service Manual

A
B
a
A. Front brake
B. Rear brake
EWA1SD1001
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 master cylinder reser-
voir. Water will significantly lower the boil-
ing point of the brake fluid and could cause
vapor lock.
ECA13540
NOTICE
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean up
any spilt brake fluid immediately.
EAS2DM1024
BLEEDING THE HYDRAULIC BRAKE
SYSTEM (for YP250R)
EWA1SD1002
WARNING
Bleed the hydraulic brake system whenever:
• the system is disassembled.
• a brake hose is loosened, disconnected or
replaced.
• the brake fluid level is very low.
• the brake operation is faulty.
a
TIP
• Be careful not to spill any brake fluid or allow
the brake master cylinder reservoir to overflow.
• When bleeding the hydraulic brake system,
make sure there is always enough brake fluid
before applying the brake. Ignoring this pre-
caution could allow air to enter the hydraulic
brake system, considerably lengthening the
bleeding procedure.
• If bleeding is difficult, it may be necessary to let
the brake fluid settle for a few hours. Repeat
the bleeding procedure when the tiny bubbles
in the hose have disappeared.
1. Bleed:
• Hydraulic brake system
▼ ▼▼▼
a. Fill the brake master cylinder reservoir to the
b. Install the diaphragm (brake master cylinder
c. Connect a clear plastic hose "1" tightly to the
A
B
A. Front brake caliper
B. Rear brake caliper
d. Place the other end of the hose into a con-
e. Slowly apply the brake several times.
f. Fully pull the brake lever and hold it in posi-
g. Loosen the bleed screw.
3-10
PERIODIC MAINTENANCE
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
proper level with the specified brake fluid.
reservoir).
bleed screw "2".
1
tainer.
tion.
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼
1
2
2