Yamaha YZFR1W 2007, Service Manual

Page: 112 / 429

CHASSIS
3-29
e. Repeat the above procedure on the oppo-
site handlebar.
f. If the steering head tension is out of specifi-
cation (both handlebars should be within
specification), remove the upper bracket
and loosen or tighten the upper ring nut.
g. Reinstall the upper bracket and measure
the steering head tension again as
described above.
h. Repeat the above procedure until the steer-
ing head tension is within specification.
i. Grasp the bottom of the front fork legs and
gently rock the front fork.
Binding/looseness
→
Adjust the steering
head.
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EAS21530
CHECKING THE FRONT FORK
1. Stand the vehicle on a level surface.
WARNING
EWA13120
Securely support the vehicle so that there
is no danger of it falling over.
2. Check:
• Inner tube “1”
Damage/scratches
→
Replace.
• Oil seal “2”
Oil leakage
→
Replace.
3. Hold the vehicle upright and apply the front
brake.
4. Check:
• Front fork operation
Push down hard on the handlebar several
times and check if the front fork rebounds
smoothly.
Rough movement
→
Repair.
Refer to "FRONT FORK" on page 4-50.
EAS21580
ADJUSTING THE FRONT FORK LEGS
The following procedure applies to both of the
front fork legs.
WARNING
EWA13150
• Always adjust both front fork legs evenly.
Uneven adjustment can result in poor
handling and loss of stability.
• Securely support the vehicle so that there
is no danger of it falling over.
Spring preload
CAUTION:
ECA13570
• Grooves are provided to indicate the
adjustment position.
• Never go beyond the maximum or mini-
mum adjustment positions.
1. Adjust:
• Spring preload
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a. Turn the adjusting bolt “1” in direction “a” or
“b”.
Direction “a”
Spring preload is increased (suspension
is harder).
Direction “b”
Spring preload is decreased (suspension
is softer).