{"product_id":"prox-exhaust-valve-and-spring-conversion-kit-28-ses2402-1-for-yamaha-yz250f","title":"ProX Exhaust Valve and Spring Conversion Kit 28.SES2402-1 for Yamaha YZ250F","description":"Latest addition to the ProX program is the Exhaust Valve \u0026amp; Spring Kits. This kit is offered as an alternative where the OEM application uses Titanium valves. ProX has now developed the Exhaust Valve \u0026amp; Spring Kits, containing a set of steel intake or exhaust valves plus a set of specially designed stronger valve springs. The ProX kit just replaces the OEM valves \u0026amp; valve springs and can be installed using the OEM retainers, bases and valve seals.\n\u003cp\u003eThe ProX Exhaust Valve and Spring Conversion Kit is designed as a durable replacement for Yamaha YZ250F models originally equipped with titanium exhaust valves. This complete conversion set includes steel exhaust valves and specially engineered valve springs that work with the original equipment retainers, spring bases, and valve seals. The kit provides a practical solution for rebuilding the cylinder head without requiring additional engine modifications.\u003c\/p\u003e\u003cp\u003eProX steel valves are nitrided to provide high surface hardness and a smooth finish that helps reduce friction between the valve stem and guide. The included springs are designed to accommodate the additional weight of steel valves while maintaining reliable valve control at high engine speeds. Manufactured from premium chrome vanadium steel, the springs offer improved strength, performance, and durability under demanding operating conditions.\u003c\/p\u003e\u003cp\u003eThe ProX part number 28.SES2402-1 is a complete exhaust valve conversion package for quick and efficient service. It is intended for fitment on 2001 through 2010 Yamaha YZ250F motorcycles, including the 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, and 2010 model years. Verify the motorcycle model and engine application before installation. Manufacturer: ProX. Vendor part number: 28.SES2402-1.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDurable Steel Valves: Provides increased durability and reduced wear under extreme operating conditions.\u003c\/li\u003e\n\u003cli\u003eNitrided Valve Finish: Delivers high microhardness and a smooth surface to help reduce friction between the valve stem and guide.\u003c\/li\u003e\n\u003cli\u003ePerformance Valve Springs: Specially designed stronger springs compensate for the additional weight of the steel valves.\u003c\/li\u003e\n\u003cli\u003eChrome Vanadium Construction: Premium chrome vanadium steel supports reliable performance and durability at high RPMs.\u003c\/li\u003e\n\u003cli\u003eOEM-Compatible Installation: Reuses the original equipment retainers, spring bases, and valve seals without requiring further engine modifications.\u003c\/li\u003e\n\u003cli\u003eComplete Conversion Package: Includes the required exhaust valves and springs for an efficient cylinder-head rebuild.\u003c\/li\u003e\n\u003cli\u003eFitment: Fits 2001-2010 Yamaha YZ250F motorcycles.\u003c\/li\u003e\n\u003cli\u003eBrand: ProX.\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: 28.SES2402-1.\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: 28.SES2402-1.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2001 Yamaha WR250F\u003cbr\u003e\n2001 Yamaha YZ250F\u003cbr\u003e\n2002 Yamaha WR250F\u003cbr\u003e\n2002 Yamaha YZ250F\u003cbr\u003e\n2003 Yamaha WR250F\u003cbr\u003e\n2003 Yamaha YZ250F\u003cbr\u003e\n2004 Yamaha WR250F\u003cbr\u003e\n2004 Yamaha YZ250F\u003cbr\u003e\n2005 Yamaha WR250F\u003cbr\u003e\n2005 Yamaha YZ250F\u003cbr\u003e\n2006 Yamaha WR250F\u003cbr\u003e\n2006 Yamaha YZ250F\u003cbr\u003e\n2007 Yamaha WR250F\u003cbr\u003e\n2007 Yamaha YZ250F\u003cbr\u003e\n2008 Yamaha WR250F\u003cbr\u003e\n2008 Yamaha YZ250F\u003cbr\u003e\n2009 Yamaha WR250F\u003cbr\u003e\n2009 Yamaha YZ250F\u003cbr\u003e\n2010 Gas-Gas EC 250F\u003cbr\u003e\n2010 Yamaha WR250F\u003cbr\u003e\n2010 Yamaha YZ250F\u003cbr\u003e\n2011 Gas-Gas EC 250F\u003cbr\u003e\n2011 Yamaha WR250F\u003cbr\u003e\n2011 Yamaha YZ250F\u003cbr\u003e\n2012 Gas-Gas EC 250F\u003cbr\u003e\n2012 Yamaha WR250F\u003cbr\u003e\n2012 Yamaha YZ250F\u003cbr\u003e\n2013 Gas-Gas EC 250F\u003cbr\u003e\n2013 Gas-Gas EC 300\u003cbr\u003e\n2013 Yamaha WR250F\u003cbr\u003e\n2013 Yamaha YZ250F\u003cbr\u003e\n2014 Gas-Gas EC 250F\u003cbr\u003e\n2014 Gas-Gas EC 300\u003cbr\u003e\n2015 Gas Gas EC 300\u003cbr\u003e\n2015 Gas-Gas EC 250F","brand":"PROX","offers":[{"title":"Default Title","offer_id":67555803594987,"sku":"19-9544","price":146.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/9895-5b18659ec0f94.jpg?v=1790744556","url":"https:\/\/ctracingservices.com\/products\/prox-exhaust-valve-and-spring-conversion-kit-28-ses2402-1-for-yamaha-yz250f","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}