Checking The Brake Discs - Yamaha YFZ450S 2003 Service Manual

1
FRONT AND REAR WHEELS
2. Check:
• wheel bearings
Wheel hub play/wheel turns roughly →
Replace.
M MMM
a. Clean wheel hub exterior.
b. Drive bearing out by pushing spacer aside
and tapping around perimeter of bearing
inner race. Use soft metal drift punch and
hammer. The spacer 1 "floats" between
bearings.
described.
WARNING
_
Eye protection is recommended when
using striking tools.
c. To install the wheel bearings, reverse the
above sequence. Use a
matches outside diameter of bearing outer
race to drive in bearing.
CAUTION:
_
Do not strike the center race or balls of the
bearing. Contact should be made only with
the outer race.
L LLL
EBS00389

CHECKING THE BRAKE DISCS

1. Check:
• brake discs
Galling/damage → Replace.
2. Measure:
• brake disc deflection
Out of specification → Check the wheel
runout.
• brake disc thickness a
Out of specification → Replace.
7 - 5
M MMM M M MMM M M MMM M
Remove both
L LLL L L LLL L L LLL L
Brake disc maximum deflection
Front: 0.10 mm (0.004 in)
Rear: 0.10 mm (0.004 in)
Brake disc minimum thickness
3 mm (0.12 in)
CHAS
M MMM M M MMM M MMM
bearings as
socket that
L LLL L L LLL L LLL