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4.48 Cleanfire Fuel Injection 9923311 - 2010-2012 PRO-RIDE RUSH/Switchback/RMK Service Manual © 2011 Polaris Sales Inc. VARIABLE EXHAUST SYSTEM (VES) Overview The Polaris VES system uses exhaust valves (1 valve per cylinder) to control the exhaust port height. The solenoid is powered by 12 VDC and turned on and off When the solenoid is powered (ON), the VES vent paths When the solenoid is OFF, the vent path(s) are closed. The ECU uses engine RPM and throttle position (TPS) as When troubleshooting the variable exhaust system, follow • Use the recommended oil. Polaris recommends VES Gold Plus engine oil for maximum VES • Never mix different brands of oil. • Follow the recommended valve periodic maintenance schedule. • Do not use harsh abrasives or sharp tools when cleaning the valves. Small abrasions and nicks • Replace rusted/corroded springs. • Inspect the bellows and replace if distorted, stretched, or torn. • Replace the housing gasket each time the housing is removed from the cylinder. Do not modify the • Inspect the vent hoses and fittings for leaks. Remove and apply thread sealant to fittings that • Verify all hose clamps are tight. • Use a Mity Vac™ hand pump to test the solenoid function. The solenoid must hold pressure and not CAUTION Do not plug the vent hoses or tamper with solenoid. Severe engine damage may occur. |