Steel Intake Valve & Spring Kit Yamaha YZ450F 03-09 WR450F 03-15 YFZ450R 04-19

ProX Steel Valve & Spring Conversion Kit For Yamaha YZ450. Replaces OEM Titanium Valves. Yamaha WR 450 F (2003 – 2015). Yamaha YZ 450 F (2003 – 2009). Steel Valves & Springs. We are happy to help you select the proper replacement part for your application but we trust that you have the proper skills, […]