2003 Polaris Deep Snow Snowmobiles Service Manual, Page 207Get this manual
DRIVEDRIVEN CLUTCHES Belt to Sheave Clearance Inspection
NOTE:The distance between the belt and the moveable sheave on the drive clutch is very importantThis distance controls the starting ratio (lowest starting ratio is most preferable) and the position of the clutch weight to engine RPMThe distance between the belt and moveable sheave should be as close to .020 (.5 mm) as possible without creating drag on the belt, when positioned around the hub at the bottom of the sheaves1Force belt to one side of drive clutchNOTE: Measure total belt to sheave clearance with new belt2Install feeler gage between other sheave and beltBelt to Sheave Clearance .020 .015 (.5 mm .4mm) Force belt to one side