Checking The Brake Fluid Level - Yamaha YZF-R25 Service Manual

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c. Connect a clear plastic hose "1" tightly to the
bleed screw "2".
A
1
B
1
A. Front
B. Rear
d. Place the other end of the hose into a con-
tainer.
e. Slowly apply the brake several times.
f. Fully pull the brake lever or fully press down
the brake pedal and hold it in position.
g. Loosen the bleed screw.
TIP
Loosening the bleed screw will release the pres-
sure and cause the brake lever to contact the
throttle grip or the brake pedal to fully extend.
h. Tighten the bleed screw, and then release
the brake lever or brake pedal.
i. Repeat steps (e) to (h) until all of the air bub-
bles have disappeared from the brake fluid in
the plastic hose.
j. Tighten the bleed screw to specification.
Brake caliper bleed screw
6 Nm (0.6 m·kgf, 4.3 ft·lbf)
k. Fill the brake master cylinder or brake fluid
reservoir to the proper level with the specified
brake fluid.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-15.
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PERIODIC MAINTENANCE
EAS30632

CHECKING THE BRAKE FLUID LEVEL

1. Stand the vehicle on a level surface.
TIP
• Place the vehicle on a suitable stand.
• Make sure the vehicle is upright.
2. Check:
• Brake fluid level
Below the minimum level mark "a" → Add the
specified brake fluid to the proper level.
A
a
B
A. Front brake
B. Rear brake
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.
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3-15
Specified brake fluid
DOT 4
a

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