Polaris 2001 High-Performance Snowmobile Service Manual (PN 9916690), Page 64Get this manual
ENGINE V.E.SMaintenance
Due to the simplicity of V.E.Sdesign, maintenance is limited to periodic inspection and cleaning of system componentsThe V.E.Sshould be disassembled, inspected, and cleaned (remove carbon deposits) every 1000 to 2000 miles, depending on operating conditionsTo ensure maximum performance and minimize required maintenance, Polaris recommends the use of Polaris Synthetic Cycle lubricant onlyThe use of other lubricants may cause improper function of the valve mechanism, and increase the frequency of required cleaning due to excessive buildup of carbon depositsAdjuster nut O-ring Valve cover Spring Valve cap Bellows Washer
V.E.SRemoval and Cleaning
Removal and cleaning is covered later in this chapterValve