Yamaha YZ250 2022, Owner'S Service Manual

Page: 89 / 274

CHASSIS
3-23
EAM30243
CHECKING THE TIRES
1. Measure:
•
Tire pressure
Out of specification

Regulate.
TIP
•
Check the tire while it is cold.
• Because if the bead stopper tightening nut is
loose when the tire pressure is low, the tire
could slip off the rim, thus be sure to check and
tighten the bead stopper tightening nut “a”.
•
If the tire valve stem “b” is found tilted, the tire
is considered to be slipping off its position. Cor-
rect the tire position.
EAM30244
CHECKING AND TIGHTENING THE SPOKES
1. Check:
• Spoke
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.
2. Tighten:
• Spoke
(with a spoke nipple wrench “1”)
TIP
•
Do not give a half turn (180

) or more for one
tightening.
•
Make sure that tightening after a break-in is
done until the initial looseness in nipples disap-
pears.
• Make sure that tightening is done in stages, not
at a time.
EAM30245
CHECKING THE WHEELS
1. Check:
•
Wheel
Damage/out-of-round

Replace.
WARNING
EWA13260
Never attempt to make any repairs to the
wheel.
EAM30246
CHECKING THE WHEEL BEARINGS
1. Check:
• Wheel bearing
Refer to “CHECKING THE FRONT WHEEL”
on page 4-4 and “CHECKING THE REAR
WHEEL” on page 4-8.
EAM30253
CHECKING THE CHASSIS FASTENERS
Make sure that all nuts, bolts, and screws are
properly tightened.
Tire air pressure (measured on
cold tires)
Front
100 kPa (1.00 kgf/cm², 15 psi)
Rear
100 kPa (1.00 kgf/cm², 15 psi)
a. Bead stopper tightening nut
b. Tire valve stem
a
b
G089059
Spoke nipple wrench (6–7)
90890-01521
Spoke nipple wrench (6–7)
YM-01521
Nipple (spoke)
2.5 N·m (0.25 kgf·m, 1.8 lb·ft)
1
G089060
T
R
.
.