Checking The Brake Discs - Yamaha FJR1300R Service Manual

FRONT WHEEL AND BRAKE DISCS
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EAS00533

CHECKING THE BRAKE DISCS

The following procedure applies to all 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.
Brake disc deflection limit (maxi-
mum)
Front: 0.1 mm (0.004 in)
Rear: 0.1 mm (0.004 in)
M MMM M MMM M M MMM M M MMM M
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 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.
L LLL L LLL L L LLL L L LLL L
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 (0.18 in)
Rear: 5.5 mm (0.22 in)
CHAS
M MMM M M MMM M MMM
L LLL L L LLL L LLL