Introduction; Checking The Front Brake Discs; Replacing The Front Brake Pads - Yamaha TMAX 2020 Service Manual

EAS30168

INTRODUCTION

EWA14101
WARNING
Disc brake components rarely require disas-
sembly. Therefore, always follow these pre-
ventive 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 reas-
sembly.
• Never use solvents on internal brake com-
ponents.
• Use only clean or new brake fluid for clean-
ing 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 im-
mediate medical attention.
EAS30169

CHECKING THE FRONT BRAKE DISCS

The following procedure applies to both brake
discs.
1. Check:
• Front brake disc
Damage/galling  Replace.
2. Measure:
• Brake disc runout
Out of specification  Correct the brake disc
runout or replace the brake disc.
Brake disc runout limit (as mea-
sured on wheel)
0.15 mm (0.0059 in)
a. Place the vehicle on the centerstand so that
the front wheel is elevated.
b. Remove the brake caliper.
c. Hold the dial gauge at a right angle against
the brake disc surface.
d. Measure the runout 1.5 mm (0.06 in) below
the edge of the brake disc.
G088908
3. Measure:
• Brake disc thickness
Measure the brake disc thickness at a few dif-
ferent locations.
Out of specification  Replace.
Brake disc thickness limit
3.5 mm (0.14 in)
4. Adjust:
• Brake disc runout
a. Remove the brake disc.
b. Rotate the brake disc by one bolt hole.
c. Install the brake disc.
Front brake disc bolt
23 N·m (2.3 kgf·m, 17 lb·ft)
LOCTITE®
ECA19150
NOTICE
Replace the brake disc bolts with new ones.
TIP
Tighten the brake disc bolts in stages and in a
crisscross pattern.
d. Measure the brake disc runout.
e. If out of specification, repeat the adjustment
steps until the brake disc runout is within
specification.
f. If the brake disc runout cannot be brought
within specification, replace the brake disc.
EAS30170

REPLACING THE FRONT BRAKE PADS

The following procedure applies to both brake
calipers.
TIP
When replacing the brake pads, it is not neces-
sary to disconnect the brake hose or disassem-
ble the brake caliper.
4-43
FRONT BRAKE