2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 214Get this manual
CLUTCHING SPECIAL TOOL AND SUPPLIES
SPX Corporation1-800-328-6657 or http:polaris.spx.com
PVT SYSTEM OVERVIEW
General Operation WARNING
All PVT maintenance or repairs should be performed only by certified Polaris Master Service Dealer (MSD) technician who has received the proper training and understands the procedures outlined in this manualBecause of the critical nature and precision balance incorporated into the PVT components, it is absolutely essential that no disassembly or repair be made without factory authorized special tools and service proceduresThe Polaris Variable Transmission (PVT) consists of three major assemblies: 1) The Drive Clutch 2) The Driven Clutch 3) The Drive Belt The internal components of the drive clutch and driven clutch control engagement (initial vehicle movement), clutch upshift and backshiftDuring the development of Polaris ATV, the PVT system is matched first to the engine power curve; then to average riding conditions and the vehicle's intended usageTherefore, modifications or variations of components at random are never recommendedProper clutch setup and careful inspection of existing components must be the primary objective when troubleshooting and tuning