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

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CHASSIS
10-8
Heavy and
dragging
Rebound
damping force
Turn adjuster counterclock-
wise (about 2 clicks) to de-
crease damping.
Spring Replace with soft spring.
Poor road grip-
ping
Rebound
damping force
Turn adjuster counterclock-
wise (about 2 clicks) to de-
crease damping.
Low compres-
sion damping
Turn adjuster clockwise (about
1 click) to increase damping.
High compres-
sion damping
Turn adjuster clockwise (about
1/6 turn) to increase damping.
Spring set
length
Set sunken length for 90–100
mm (3.5–3.9 in) when one
passenger is astride seat.
Spring Replace with soft spring.
Bottoming out
High compres-
sion damping
Turn adjuster clockwise (about
1/6 turn) to increase damping.
Spring set
length
Set sunken length for 90–100
mm (3.5–3.9 in) when one
passenger is astride seat.
Spring Replace with stiff spring.
Bouncing
Rebound
damping force
Turn adjuster clockwise (about
2 clicks) to increase damping.
Spring Replace with soft spring.
Stiff travel
High compres-
sion damping
Turn adjuster counterclock-
wise (about 1/6 turn) 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.
Spring Replace with soft spring.
Symptom
Section
Check Adjust
Jump Large
gap
Medi-
um
gap
Small
gap