2007-2011 Polaris IQ Snowmobiles Service Manual, Page 422Get this manual
Shocks Ryde FX Air 2.0 Shock
The shock rod pressure setting can be adjusted to accommodate different rider weights and riding stylesBefore making any shock pressure adjustments, the rider should ride the snowmobile for at least 250500 miles in all types of riding conditionsNOTE: Do not adjust the shock body chamber pressure settingAlways charge the shock body chamber to specificationSHOCK ROD GAS FILL PORT
If the rider is requesting stiffer shock settings for more bottoming resistance, increase the shock rod nitrogen pressure in PSI increments until the desired performance level is achieved