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2015 Harley Davidson XG500 Street 500
For use with custom 13in
Top Font Vent for FF-98 Helmets
2003-2007 Arctic Cat 400 4x4
2011-2012 Polaris Sportsman Forest Tractor 500
Starting Line Products 14-118 Exhaust Valve Springs - White electrical-turn-signals-components-wiring 2015 Harley Davidson XG500 StreetLoad 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.
