Introduction; Checking The Rear Brake Disc; Replacing The Rear Brake Pads - Yamaha MT-03 Service Manual

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INTRODUCTION

EWA14100
WARNING
Disc brake components rarely require dis-
assembly. Therefore, always follow these
preventive measures:
• Never disassemble brake components un-
less absolutely necessary.
• If any connection on the hydraulic brake
system is disconnected, the entire brake
system must be disassembled, drained,
cleaned, properly filled, and bled after re-
assembly.
• Never use solvents on internal brake com-
ponents.
• Use only clean or new brake fluid for
cleaning brake components.
• Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean
up any spilt brake fluid immediately.
• Avoid brake fluid coming into contact with
the eyes as it can cause serious injury.
• FIRST AID FOR BRAKE FLUID ENTERING
THE EYES:
• Flush with water for 15 minutes and get
immediate.
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CHECKING THE REAR BRAKE DISC

1. Remove:
• Rear wheel
Refer to "REAR WHEEL" on page 4-12.
2. Check:
• Brake disc
Damage/galling
3. Measure:
• Brake disc deflection
Out of specification
deflection or replace the brake disc.
Refer to "CHECKING THE FRONT BRAKE
DISCS" on page 4-23.
Brake disc deflection limit
0.15 mm (0.0059 in)
4. Measure:
• Brake disc thickness
Measure the brake disc thickness at a few
different locations.
Out of specification
Refer to "CHECKING THE FRONT BRAKE
DISCS" on page 4-23.
Replace.
Correct the brake disc
Replace.
Brake disc thickness limit
4.5 mm (0.18 in)
5. Adjust:
• Brake disc deflection
Refer to "CHECKING THE FRONT BRAKE
DISCS" on page 4-23.
Rear brake disc bolt
30 Nm (3.0 m·kg, 22 ft·lb)
LOCTITE
6. Install:
• Rear wheel
Refer to "REAR WHEEL" on page 4-12.
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REPLACING THE REAR BRAKE PADS

NOTE:
When replacing the brake pads, it is not neces-
sary to disconnect the brake hose or disassem-
ble the brake caliper.
1. Measure:
• Brake pad wear limit "a"
Out of specification
pads as a set.
Brake pad lining thickness
(inner)
4.7 mm (0.18 in)
Limit
1.0 mm (0.04 in)
Brake pad lining thickness
(outer)
4.7 mm (0.18 in)
Limit
1.0 mm (0.04 in)
2. Install:
• Brake pad springs
• Brake pads
4-35
REAR BRAKE
®
Replace the brake
a