Checking The Brake Disc - Yamaha MIO Service Manual

FRONT WHEEL AND BRAKE DISC
6 - 5
CAUTION:
_
Do not contact the wheel bearing inner race
4 or balls 5. Contact should be made only
with the outer race 6.
NOTE:
_
Use a socket 7 that matches the diameter of
the wheel bearing outer race and oil seal.
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EAS00527

CHECKING THE BRAKE DISC

1. Check:
• brake disc
Damage/galling → Replace.
2. Measure:
• brake disc deflection
Out of specification → Correct the brake
disc deflection or replace the brake disc.
Brake disc deflection limit (maxi-
mum)
0.15 mm (0.006 in)
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a. Place the motorcycle on a suitable stand so
that the front wheel is elevated.
b. Before measuring the front brake disc
deflection, turn the handlebar to the left or
right to ensure that the front wheel is sta-
tionary.
c. Remove the brake caliper.
d. Hold the dial gauge at a right angle against
the brake disc surface.
e. Measure the deflection 1.5 mm (0.059 in)
below the edge of the brake disc.
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CHAS
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