Yamaha YZ450FF 1SL-28199-11, Owner'S Service Manual

Page: 352 / 358

CHASSIS
10-7
EAS1SL5380
SUSPENSION SETTING (REAR SHOCK ABSORBER)
TIP
• If any of the following symptoms is experienced with the standard position as the base, make reset-
ting by reference to the adjustment procedure given in the same chart.
• Adjust the rebound damping in 2-click increments or decrements.
• Adjust the low compression damping in 1-click increments or decrements.
• Adjust the high compression damping in 1/6 turn increments or decrements.
Low front, tend-
ing to lower
front posture
Compression
damping force
Turn adjuster clockwise (about
2 clicks) to increase damping.
Rebound
damping force
Turn adjuster counterclock-
wise (about 2 clicks) to de-
crease damping.
Balance with
rear end
Set sunken length for 95–100
mm (3.7–3.9 in) when one
passenger is astride seat (low-
er rear posture).
Oil amount Increase oil amount by about 5
cm
3
(0.2 US oz, 0.2 Imp.oz).
“Obtrusive”
front, tending to
upper front pos-
ture
Compression
damping force
Turn adjuster counterclock-
wise (about 2 clicks) to de-
crease damping.
Balance with
rear end
Set sunken length for 90–95
mm (3.5–3.7 in) when one
passenger is astride seat (up-
per rear posture).
Spring Replace with soft spring.
Oil amount Decrease oil amount by about
5–10 cm
3
(0.2–0.3 US oz, 0.2–
0.4 Imp.oz).
Symptom
Section
Check Adjust
Jump Large
gap
Medi-
um
gap
Small
gap
Stiff, tending to
sink
Rebound
damping force
Turn adjuster counterclock-
wise (about 2 clicks) to de-
crease damping.
Spring set
length
Set sunken length for 90–100
mm (3.5–3.9 in) when one
passenger is astride seat.
Spongy and un-
stable
Rebound
damping force
Turn adjuster clockwise (about
2 clicks) to increase damping.
Low compres-
sion damping
Turn adjuster clockwise (about
1 click) to increase damping.
Spring Replace with stiff spring.
Symptom
Section
Check Adjust
Jump Large
gap
Medi-
um
gap
Small
gap