Polaris 2001 High-Performance Snowmobile Service Manual (PN 9916690), Page 50Get this manual
GENERAL INFORMATION Shocks
Why gas shocks? Because one race is equal to one season of trail ridingGas shocks such as FOX are must because the valving can be changed and they can be rebuiltThis is important because conditions vary from track to trackAlso, because of the length of an ice race, it's important to have shock you can rebuild and maintain from race to raceQuality shocks are as important as having fresh engineRemember, lot of horse power won't help if you can't keep the machine on the ground
Valving