Starting Line Products 14-118 Exhaust Valve Springs - White control-handlebars-accessories-switch-covers May allow more spark advance

May allow more spark advance for increased torque

2008-2015 Yamaha XV19C Raider

Ball joint includes ball joint

1994 Honda XR80R

Starting Line Products 14-118 Exhaust Valve Springs - White control-handlebars-accessories-switch-covers May allow more spark advanceLoad 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.