Yamaha YZ450F(V), Owner'S Service Manual

Page: 446 / 650

5 - 4
CHAS
FRONT WHEEL AND REAR WHEEL
EC514200
Wheel axle
1. Measure:
• Wheel axle bends
Out of specification
→
Replace.
Use the dial gauge
1
.
NOTE:
The bending value is shown by one half of the
dial gauge reading.
WARNING
Do not attempt to straighten a bent axle.
Wheel axle bending limit:
0.5 mm (0.020 in)
EC594200
Brake disc
1. Measure:
• Brake disc deflection (only rear brake
disc)
Use the dial gauge
1
.
Out of specification
→
Inspect wheel
runout.
If wheel runout is in good condition,
replace the brake disc.
2. Measure:
• Brake disc thickness
a
Out of limit
→
Replace.
Disc deflection limit:
Standard <Limit>
Rear
—
0.15 mm
(0.006 in)
Disc wear limit:
Standard <Limit>
Front
3.0 mm (0.12 in) 2.5 mm (0.10 in)
Rear
4.0 mm (0.16 in) 3.5 mm (0.14 in)