Polaris 600 RMK Owner's Manual page 48

THE PERFECT FIT
Rear Suspension Adjustments
Rear Shocks
ARVIN Rapid Adjust Shock
The ARVIN Rapid Adjust shock is available as an option on some
models. Turn the Rapid Adjust knob (L) on the shock reservoir to
make adjustments to the compression damping.
Positions are labeled on the shock. When adjusting, we recommend
that you turn the adjuster slightly, then test ride.
L
45