2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 232Get this manual
CLUTCH SYSTEM PVT TROUBLESHOOTING
Overheating
IMPORTANT: During routine maintenance or whenever PVT system overheating is evident, it's important to check the inlet and outlet ducting for obstructionsObstructions to air flow through the ducts will significantly increase PVT system operating temperaturesThe ATV should be operated in low range when pulling or plowing heavy loads, or if extended low speed operation is anticipated
General Range Operation Guidelines
LOW RANGE: Heavy pulling, basic operational speeds less than MPH, riding through rough terrain (swamps, mountains, etc), low ground speeds
HIGH RANGE: High ground speeds, speeds above MPH