Yamaha YZ450FX 2023 Owner's Manual page 157

Symptom
Jump
Heavy and drag-
ging
Poor road grip-
ping

Bottoming out

Bouncing

Stiff travel
Section
Large Medium Small
gap gap gap
 




Check
Rebound damp-
ing force
Spring
Rebound damp-
ing force
Low compres-
sion damping
High compres-
sion damping
Spring set length
Spring
High compres-
sion damping
Spring set length
Spring
Rebound damp-
ing force
Spring
High compres-
sion damping
Spring set length
Spring
9-8
CHASSIS
Adjust
Turn adjuster counterclockwise
(about 2 clicks) to decrease
damping.
Replace with soft spring.
Turn adjuster counterclockwise
(about 2 clicks) to decrease
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 pas-
senger 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 pas-
senger is astride seat.
Replace with stiff spring.
Turn adjuster clockwise (about 2
clicks) to increase damping.
Replace with soft spring.
Turn adjuster counterclockwise
(about 1/6 turn) to decrease
damping.
Set sunken length for 90–100
mm (3.5–3.9 in) when one pas-
senger is astride seat.
Replace with soft spring.