Checking The Brake Discs - Yamaha YZF-R1 1998 Service Manual

FRONT WHEEL AND BRAKE DISCS
7 - 5
c. Remove the wheel bearings 3 with a
general bearing puller.
d. Install the new wheel bearings and oil
seals in the reverse order of disas-
sembly.
CAUTION:
ACHTUNG:
Do not contact the wheel bearing center
race 4 or balls 5. Contact should be
made only with the outer race 6.
NOTE:
Use a socket 7 that matches the diame-
ter of the wheel bearing outer race and
oil seal.
EB700416

CHECKING THE BRAKE DISCS

The following procedure applies to both of
the brake discs.
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.
Max. brake disc deflection
Front: 0.1 mm
Rear: 0.1 mm
a. Place the motorcycle on a suitable
stand so that the wheel is elevated.
b. Before measuring the front brake disc
deflection, turn the handlebars 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.
CHAS