Yamaha YZ250(W)/W1, Owner'S Service Manual

Page: 378 / 596

5-4
CHAS
FRONT WHEEL AND REAR WHEEL
EC514200
Wheel axle
1. Measure:
9 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.
w
Do not attempt to straighten a bent axle.
EC594200
Brake disc
1. Measure:
9
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, re-
place the brake disc.
2. Measure:
9 Brake disc thickness
a
Out of limit
→
Replace.
Wheel axle bending limit:
0.5 mm (0.020 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)
Disc deflection limit:
Standard <Limit>
Rear — 0.15 mm (0.006 in)
1P8-9-32-5a 4/10/06 4:39 PM Page 8