2008-2010 Kawasaki KFX450R Factory Service Manual, Page 349Get this manual
13-8 SUSPENSION Shock Absorbers
To suit to various riding conditions, the spring preload of the shock absorber can be adjusted or the spring can be replaced with an optional oneAlso the damping force can be adjusted easily so changing oil viscosity unnecessary
Front Shock Absorber Rebound Damping Adjustment
[A] Turn the rebound damping adjuster of aon the front shock absorber lower end with the blade screwdriver until you feel clickIf the damper setting feels too soft or too stiff, adjust it in accordance with the following table:
Seated position: adjuster turned fully clockwise [A]Rebound Damping Adjuster Setting clicks [B] Standard: Softer (Counterclockwise) [C] Harder (Clockwise) [D]