Checking The Rear Brake Pads; Checking The Front/Rear Brake Hoses; Bleeding The Hydraulic Brake System - Yamaha YZF-R25 Service Manual

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EAS30634

CHECKING THE REAR BRAKE PADS

The following procedure applies to all of the
brake pads.
1. Operate the brake.
2. Check:
• Rear brake pad
Wear indicator grooves "a" almost disap-
peared → Replace the brake pads as a set.
Refer to "REAR BRAKE" on page 4-42.
EAS30635
CHECKING THE FRONT BRAKE HOSES
1. Check:
• Brake hose "1"
Cracks/damage → Replace.
1
2. Check:
• Brake hose holder
Loose → Tighten the holder bolt.
• Brake hose guide
Loose → Tighten the guide bolt.
3. Hold the vehicle upright and apply the brake
several times.
4. Check:
• Brake hose
Brake fluid leakage → Replace the damaged
hose.
Refer to "FRONT BRAKE" on page 4-30.
EAS30636
CHECKING THE REAR BRAKE HOSE
1. Check:
• Brake hose "1"
Cracks/damage → Replace.
a
a
3-14
PERIODIC MAINTENANCE
1
2. Check:
• Brake hose guide
Loose → Tighten the bolt.
3. Hold the vehicle upright and apply the rear
brake several times.
4. Check:
• Brake hose
Brake fluid leakage → Replace the damaged
hose.
Refer to "REAR BRAKE" on page 4-42.
EAS30637
BLEEDING THE HYDRAULIC BRAKE
SYSTEM
EWA13100
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.
• brake operation is faulty.
TIP
• Be careful not to spill any brake fluid or allow
the brake master cylinder reservoir or brake
fluid 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
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a. Fill the brake fluid reservoir to the proper level
with the specified brake fluid.
b. Install the diaphragm (brake master cylinder
reservoir or brake fluid reservoir).
1
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