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2011-2012 Polaris Sportsman Forest Tractor 500
Second generation controller with improved remote range
Top Font Vent for FF-98 Helmets
Provide exceptional hookup on loose soft snow and powder
1998 Ducati 900 Sport
Starting Line Products 14-118 Exhaust Valve Springs - White electrical-turn-signals-components-wiring 2011-2012 Polaris Sportsman Forest TractorLoad at . 63in. 2. 8lbs. Load at 1in. 1. 6lbs. Polaris exhaust valves open with cylinder pressure. As you go up in elevation, cylinder pressures are reduced causing exhaust valves to open later than they should or in some cases not at all. This can cause poor and inconsistent top end horsepower. Changing to lighter exhaust valve springs allows the exhaust valves to open at the proper time maintaining proper top end horsepower and running consistency.
