Adjusting The Rear Shock Absorber High Compression Damping Force; Checking The Tire Pressure; Checking And Tightening The Spokes; Checking The Wheels - Yamaha WR450F(Y) 2009 Owner's Service Manual

ADJUSTING THE REAR SHOCK
ABSORBER HIGH COMPRESSION
DAMPING FORCE
1. Adjust:
• High compression damping force
By turning the adjuster "1".
Stiffer "a" → Increase the high
compression damping force.
(Turn the adjuster "1" in.)
Softer "b" → Decrease the high
compression damping force.
(Turn the adjuster "1" out.)
Extent of adjustment:
Maximum Minimum
2 turns out
Fully turned in
(from maximum
position
position)
• STANDARD POSITION:
This is the position which is back
by the specific number of turns
from the fully turned-in position.
(Which align the punch mark "a"
on the adjuster with the punch
mark "b" on the adjuster body.)
Standard position:
About 1-1/8 turns out
* About 1-1/4 turns out
* For AUS, NZ and ZA
Do not force the adjuster past the
minimum or maximum extent of
adjustment. The adjuster may be
damaged.

CHECKING THE TIRE PRESSURE

1. Measure:
• Tire pressure
Out of specification → Adjust.
Standard tire pressure:
100 kPa (1.0 kgf/cm
15 psi)
• Check the tire while it is cold.
• Loose bead stoppers allow the tire
to slip off its position on the rim
when the tire pressure is low.
• A tilted tire valve stem indicates that
the tire slips off its position on the
rim.
• If the tire valve stem is found tilted,
the tire is considered to be slipping
off its position. Correct the tire posi-
tion.
CHECKING AND TIGHTENING THE
SPOKES
The following procedure applies to all
of the spokes.
1. Check:
• Spokes
Bend/damage → Replace.
Loose spoke → Retighten.
Tap the spokes with a screwdriv-
er.
A tight spoke will emit a clear, ringing
tone; a loose spoke will sound flat.
2. Tighten:
• Spokes
(with a spoke nipple wrench "1")
Be sure to retighten these spokes be-
fore and after break-in.
Spoke nipple wrench:
YM-01521/90980-01521
2
,
3-26
CHASSIS
Spokes:
3 Nm (0.3 m•kg, 2.2
ft•lb)

CHECKING THE WHEELS

1. Inspect:
• Wheel runout
Elevate the wheel and turn it.
Abnormal runout → Replace.
2. Inspect:
• Bearing free play
Exist play → Replace.
CHECKING AND ADJUSTING THE
STEERING HEAD
1. Place a stand under the engine to
raise the front wheel off the
ground. WARNING! Securely
support the vehicle so that
there is no danger of it falling
over.
2. Check:
• Steering stem
Grasp the bottom of the forks and
gently rock the fork assembly
back and forth.
Free play → Adjust steering head.
3. Check:
• Steering smooth action
Turn the handlebar lock to lock.
Unsmooth action → Adjust steer-
ing ring nut.