{"product_id":"prox-steel-intake-valve-conversion-set-28-sis4341-2-for-kawasaki-kx250f","title":"ProX Steel Intake Valve Conversion Set 28.SIS4341-2 for Kawasaki KX250F","description":"Latest addition to the ProX program is the Steel Intake and Exhaust Valve \u0026amp; Spring Kits. This kit is offered as an alternative where the OEM application uses Titanium valves. ProX has now developed the Steel Intake and 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 Steel Intake Valve Conversion Set, manufacturer part number 28.SIS4341-2, provides a durable replacement for OEM titanium intake valves and valve springs. Designed for Kawasaki KX250F applications from 2011 through 2016, this complete conversion kit is engineered for riders and technicians seeking dependable performance under demanding engine conditions.\u003c\/p\u003e\u003cp\u003eEach kit includes steel intake valves and specially designed stronger valve springs to accommodate the additional weight of steel components. The nitrided valves provide high microhardness and a smooth surface finish that helps reduce friction between the valve stem and guide. Premium chrome vanadium steel springs are designed to support reliable operation and durability at high engine speeds.\u003c\/p\u003e\u003cp\u003eInstallation is straightforward because the ProX kit is designed to work with the original equipment retainers, bases, and valve seals. No additional engine modifications are required, allowing the cylinder head to be fully rebuilt with commonly retained OEM components. The complete package supports a practical and cost-efficient replacement solution for maintaining the valve train of compatible Kawasaki motocross motorcycles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2011 Kawasaki KX250F; 2012 Kawasaki KX250F; 2013 Kawasaki KX250F; 2014 Kawasaki KX250F; 2015 Kawasaki KX250F; 2016 Kawasaki KX250F.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSteel intake valves provide increased durability and reduced wear under extreme operating conditions.\u003c\/li\u003e\n\u003cli\u003eNitrided valve surfaces deliver high microhardness and a smooth finish that helps reduce stem-to-guide friction.\u003c\/li\u003e\n\u003cli\u003eStronger valve springs are engineered to accommodate the added weight of steel valves.\u003c\/li\u003e\n\u003cli\u003eCompatible with OEM retainers, bases, and valve seals without requiring additional engine modifications.\u003c\/li\u003e\n\u003cli\u003eChrome vanadium steel springs support performance and durability at high engine speeds.\u003c\/li\u003e\n\u003cli\u003eComplete conversion package enables a straightforward replacement of the original titanium valve and spring components.\u003c\/li\u003e\n\u003cli\u003eBrand: ProX.\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: 28.SIS4341-2.\u003c\/li\u003e\n\u003cli\u003eVendor part number: 28.SIS4341-2.\u003c\/li\u003e\n\u003cli\u003eModel: Steel Intake Valve Conversion Set.\u003c\/li\u003e\n\u003cli\u003eFitment: 2011–2016 Kawasaki KX250F.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2011 Kawasaki KX250F\u003cbr\u003e\n2012 Kawasaki KX250F\u003cbr\u003e\n2013 Kawasaki KX250F\u003cbr\u003e\n2014 Kawasaki KX250F\u003cbr\u003e\n2015 Kawasaki KX250F\u003cbr\u003e\n2016 Kawasaki KX250F","brand":"PROX","offers":[{"title":"Default Title","offer_id":67555808903403,"sku":"19-9531","price":146.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/54f5-572a591210f8d.jpg?v=1790744694","url":"https:\/\/ctracingservices.com\/products\/prox-steel-intake-valve-conversion-set-28-sis4341-2-for-kawasaki-kx250f","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}