Checking The Brake Disc - Yamaha MBK YQ100 Service Manual

FRONT WHEEL AND BRAKE DISC
347001
347002
6-6
EAS00528

CHECKING THE BRAKE DISC

1.Check:
• Brake disc
Damage/galling → Replace.
2.Measure:
• Brake disc deflection
Out of specification → Inspect wheel runout.
If wheel runout is in good condition, correct the
brake disc deflection or replace the brake disc.
Brake disc deflection limit
(maximum)
0.2 mm
a.Place the scooter 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 stationary.
c. Remove the brake caliper.
d.Hold the dial gauge at a right angle against the
brake disc surface.
e.Measure the deflection 2 ~ 3 mm below the
edge of the brake disc.
3.Measure:
• Brake disc thickness
Measure the brake disc thickness at a few
different locations.
Out of specification → Replace.
Brake disc thickness limit
(minimum)
3.2 mm
4.Adjust:
• Brake disc deflection
a.Remove the brake disc.
b.Rotate the brake disc by one bolt hole.
c. Install the brake disc.
NOTE:
Tighten the brake disc bolts in stages and in a
crisscross pattern.
CHAS