Yamaha VMX12 2001 Service Manual page 282

FRONT WHEEL AND BRAKE DISCS
7 - 7
a. Place the motorcycle on a suitable stand so
that the 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 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 (mini-
mum)
Front: 4.5 mm
Rear: 7.0 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.
@
Brake disc bolt
23 Nm (2.3 m • kg)
LOCTITE
d. Measure the brake disc deflection.
e. If out of specification, repeat the adjustment
steps until the brake disc deflection is within
specification.
f. If the brake disc deflection cannot be
brought within specification, replace the
brake disc.
CHAS
®