Yamaha WR450F Owner's Service Manual page 149

Symptom
Jump
Heavy and
dragging
Poor road grip-
ping
Bottoming out
Bouncing
Stiff travel
Section
Medi-
Large Small
um
gap gap
gap
Check
Rebound
damping force
Spring
Rebound
damping force
Low compres-
sion damping
High compres-
sion damping
Spring set
length
Spring
High compres-
sion damping
Spring set
length
Spring
Rebound
damping force
Spring
High compres-
sion damping
Spring set
length
Spring
4-8
CHASSIS
Adjust
Turn adjuster counterclock-
wise (about 2 clicks) to de-
crease damping.
Replace with soft spring.
Turn adjuster counterclock-
wise (about 2 clicks) to de-
crease damping.
Turn adjuster clockwise (about
1 click) to increase damping.
Turn adjuster clockwise (about
1/6 turn) to increase damping.
Set sunken length for 90–100
mm (3.5–3.9 in) when one
passenger is astride seat.
Replace with soft spring.
Turn adjuster clockwise (about
1/6 turn) to increase damping.
Set sunken length for 90–100
mm (3.5–3.9 in) when one
passenger is astride seat.
Replace with stiff spring.
Turn adjuster clockwise (about
2 clicks) to increase damping.
Replace with soft spring.
Turn adjuster counterclock-
wise (about 1/6 turn) to de-
crease damping.
Set sunken length for 90–100
mm (3.5–3.9 in) when one
passenger is astride seat.
Replace with soft spring.