Yamaha YZ 2017 Series, Owner'S Service Manual

Page: 132 / 410

FRONT WHEEL
4-4
EASB29B128
REMOVING THE FRONT WHEEL
1. Use a suitable stand to raise the front wheel
off the ground.
EWA
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
2. Remove:
• Front wheel
EASB29B129
CHECKING THE FRONT WHEEL
1. Check:
• Front wheel axle
Roll the front wheel axle on a flat surface.
Bends

Replace.
EWA
WARNING
Do not attempt to straighten a bent wheel
axle.
2. Check:
• Tire(s)
• Front wheel
Damage/wear

Replace.
Refer to “CHECKING THE TIRES” on page
3-33 and “CHECKING THE WHEELS” on
page 3-34.
3. Check:
• Spokes
Bend/damage

Replace.
Loose

Tighten.
Tap the spokes with a screwdriver.
TIP
A tight spoke will emit a clear, ringing tone; a
loose spoke will sound flat.
4. Tighten:
• Spokes
Refer to “CHECKING AND TIGHTENING
THE SPOKES” on page 3-33.
TIP
After tightening the spokes, measure the wheel
runout.
5. Measure:
• Wheel radial runout “a”
• Wheel lateral runout “b”
Out of specification

Repair/replace.
6. Check:
• Collars
Damage/wear

Replace.
7. Check:
• Bearing
Front wheel turns roughly or is loose

Re-
place the wheel bearings.
• Oil seals
Damage/wear

Replace.
Spokes
2.5 Nm (0.25 m·kgf, 1.8 ft·lbf)
Radial wheel runout limit
2.0 mm (0.08 in)
Lateral wheel runout limit
2.0 mm (0.08 in)
T
R
.
.
a
b