Yamaha YZ450F Manuel D'atelier Du Proprietaire page 442

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