2007-2011 Polaris IQ Snowmobiles Service Manual, Page 341Get this manual
Steering and Suspensions Adjustable Shocks
Snowmobiles equipped with adjustable Ryde FX shocks allow the driver to make adjustments to the compression valving by turning the screw on the shockBy turning the screw clockwise (a small screwdriver or dime work well), the compression valving is increased, stiffening the rideTo soften the ride, reduce the compression by turning the screw counter-clockwiseA great deal of ride performance is accomplished with mere 12 to turnsThere are approximately full turns of adjustment availableIf the suspension is "bottoming", tighten the compression screw clockwise in 12 turn increments until the bottoming stopsBacking off 14 turn counter-clockwise at this point should give you the best possible ride ensuring use of the full travel of the suspensionThe opposite procedure should be used if the suspension is too stiff upon initial setupIf bottoming continues after the screw is turned in full clockwise, the compression spring should be adjusted with the threaded adjustment collarBack the screw out to the original starting position after the compression spring has been adjustedRiding conditions are ever changingKeep in mind the compression damping adjustable screw can be adjusted at any time to achieve the best possible ride in any conditionNOTE: Install shock so the adjustment screw is facing outwards