Polaris 2001 High-Performance Snowmobile Service Manual (PN 9916690), Page 293Get this manual
REAR SUSPENSIONTRACKTRACTION Rear Suspension Tuning
Many factors influence the overall handling characteristics of snowmobile suspensionsRider weight, riding style, course conditions, and the condition of suspension components are some of the things that you have to consider when tuning suspensionOn new machines, or whenever new suspension parts are installed, the sled should be ridden for at least one tank of fuel to allow moving parts in the shocks and suspension to wear inS Front Suspension: The front suspension should sag (unloaded) about (measured at the front bumper) with the weight of the sledUse stiffer or softer springs as needed to keep from bottoming too hard, and to ensure the entire range of travel is usedHINT: Sliding the jounce bumper all the way down the shock rod will show how much travel is being used