Yamaha RAPTORYFM660RS Owner's Manual page 42

Adjust the rebound damping force as follows.
Turn the rebound damping force adjusting
screw in direction a to increase the rebound
damping force and in direction b to decrease
the rebound damping force.
1. Rebound damping force adjusting screw
From the fully turned-in position
Minimum (soft): 20 clicks out
Standard: 10 clicks out
Maximum (hard): 3 clicks out
Adjust the compression damping force as fol-
lows.
Turn the compression damping force adjust-
ing screw in direction a to increase the com-
pression damping force and in direction b to
decrease the compression damping force.
1. Compression damping force adjusting screw
From the fully turned-out position
Minimum (soft): 1 click in
Standard: 7 clicks in
Maximum (hard): 12 clicks in
4-20