Polaris 2001 High-Performance Snowmobile Service Manual (PN 9916690), Page 330Get this manual
REAR SUSPENSIONTRACKTRACTION Traction
The amount of traction required varies depending upon the type of riding and the snowmobile's horsepowerStuds are designed specifically for each riding categoryThey're made in various lengths, shapes, and materialsImproperly applied studs can cause poor traction and premature wearStuds which are too long can cause damage to the tunnel and heat exchangersStud points fall into two categories: conical and scoopersConical studs (or picks) penetrate into the ground for increased tractionScoopers use flat surface to hold more ground for tractionGenerally, penetrating point is used for hard ground surfaces and iceScoopers are used on softer surfacesMaterial contributes more to stud life and cost than to functionalityCarbide is the most durable and lasts much longer than steelStuds should be installed no closer than 34from the edges of the trackAvoid the center of the track because there is poor support in this areaThe track's center belt controls accelerationThe two smaller outside track belts contribute to acceleration, and have the largest affect on corneringThe following chart is guideline for the quantity of studs to installHorsepower 50-60 HP 60-75 HP 75-100 HP 100-125 HP 120-130 HP 125-150 HP 130-170 HP Snowcross Cross Country 96 Studs 96 Studs 120 Studs 144 Studs 168 Studs 192 Studs 240 Studs Drag 96 Studs 120 Studs 144 Studs 168 Studs 192 Studs 240 Studs 240 Studs