{"product_id":"valve-conversion-kit-exhaust-wossner-yamaha-2003-2015-vks4008a-exh","title":"Valve conversion kit Exhaust Wossner - Yamaha (2003 - 2015)","description":"\u003cp\u003eWossner steel valve conversion kit for Yamaha motorcycles (2003 to 2015). The steel valve conversion kits replace titanium valves in modern four-stroke engines, reducing maintenance frequency and cost with only a minimal loss of performance at high RPM. The kits are made of high-quality materials and meet strict tolerances to ensure compatibility. Besides the 2 steel valves (3 on some models), the kit includes the valve springs needed to compensate for the heavier steel valves. Whenever the valves are replaced, the valve seats must be resurfaced to ensure proper sealing. This work should be left to qualified professionals. Recheck the valve clearance after the first use. Some valve springs have a variable pitch: the side with the tighter coils must be fitted towards the head. The spring on the camshaft side is marked with a coloured coating (harmless to the engine). Compatible models include Yamaha WR 450 F and Yamaha YZ 450 F. The compatibility list on this page shows every supported model and year. Please check it against your bike before ordering.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eFits Yamaha\u003c\/li\u003e\u003c\/ul\u003e","brand":"Wossner","offers":[{"title":"Default Title","offer_id":59496730689884,"sku":"VKS4008A-EXH","price":119.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/9348\/4892\/files\/01-29_1e9f09b0-5abc-4bd1-80b2-0cf19541dc2e.jpg?v=1791951155","url":"https:\/\/checkout.zixracingparts.com\/products\/valve-conversion-kit-exhaust-wossner-yamaha-2003-2015-vks4008a-exh","provider":"Zix Racing Parts","version":"1.0","type":"link"}