Introduction; Checking The Front Brake Discs; Replacing The Front Brake Pads - Yamaha XSR 900 2022 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 → Replace.
Brake disc runout limit (as mea-
sured on wheel)
0.10 mm (0.0039 in)
a. Place the vehicle on a maintenance stand
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
4.0 mm (0.16 in)
4. Replace:
• Brake disc
Refer to "FRONT WHEEL" on page 4-12.
Front brake disc bolt
18 N·m (1.8 kgf·m, 13 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.
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.
4-33
FRONT BRAKE