Pro X Valve And Spring Kit - 28.SES2402-1 For Gas Gas 250F / 300F 2010-2015 | Yamaha WR 250 / YZ 250 2001-2013 Brand_Hot Cams Increases power and drivability

Increases power and drivability

70" Spring Rate 5

Heavy-duty nut fits flywheel-side of sprocket shaft

2-ply grip to reduce vibration

Product Name Riser Type Straight Style Paughco Color/Finish Black / Powder-Coated Base Color Black Finish Powder-Coated Material Billet Aluminum Rise 1-1/2" Clamping Diameter 1" Units Kit Riding Style Street

Pro X Valve And Spring Kit - 28.SES2402-1 For Gas Gas 250F / 300F 2010-2015 | Yamaha WR 250 / YZ 250 2001-2013 Brand_Hot Cams Increases power and drivabilityFeatures Replaces the OEM valves and valve springs Steel, nitrided valves for increased durability and less wear under extreme conditions Stronger valve springs deal with the extra weight of the steel valves Springs are made from premium chrome vanadium steel for higher performance and durability at high rpm Kit contains a set of steel intake or exhaust valves plus a set of specially designed valve springs; can be installed using the OEM retainers,