{"product_id":"kibblewhite-top-end-kit-white-diamond-piston-yfz450r","title":"Kibblewhite Top End Kit - White Diamond Valves with Piston - Yamaha YFZ450R","description":"\u003ch3\u003e✓ Fits\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eYamaha YFZ450R (2009-2020, 2023-2025).\u003c\/strong\u003e Complete top-end service kit with White Diamond valves and piston.\u003c\/p\u003e\n\u003ch3\u003e✓ About This Kit\u003c\/h3\u003e\n\u003cp\u003eThis Kibblewhite Top End Service Kit includes everything needed for a complete top-end rebuild in one box: White Diamond stainless valves, a racing valve spring kit, a high-performance piston kit, and all the gaskets and seals. It is the one-part answer to a full top-end refresh on your YFZ450R, built around Kibblewhite's proven valvetrain components.\u003c\/p\u003e\n\u003ch3\u003e✓ Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEverything for a complete top-end service or rebuild in one kit\u003c\/li\u003e\n\u003cli\u003eWhite Diamond stainless valves (intake and exhaust)\u003c\/li\u003e\n\u003cli\u003eLightweight racing valve spring kit with titanium retainers, dual springs, and H.T. steel base washers\u003c\/li\u003e\n\u003cli\u003eSprings are suitable for use with high-performance cams\u003c\/li\u003e\n\u003cli\u003eHigh-performance piston fully machined from 2618 aluminum with a performance skirt coating\u003c\/li\u003e\n\u003cli\u003eAll necessary gaskets, seals, and O-rings included\u003c\/li\u003e\n\u003cli\u003eSpring specs: 39 lb seat pressure, 86 lb open pressure, 0.380 inch lift\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✓ What's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2x Intake Standard Outer and 2x Intake Standard Center White Diamond valves\u003c\/li\u003e\n\u003cli\u003e2x Exhaust Standard White Diamond valves\u003c\/li\u003e\n\u003cli\u003e3x Intake and 2x Exhaust titanium retainers\u003c\/li\u003e\n\u003cli\u003e3x Intake and 2x Exhaust CrSi valve springs\u003c\/li\u003e\n\u003cli\u003e3x Intake and 2x Exhaust H.T. steel base washers\u003c\/li\u003e\n\u003cli\u003e3x Intake and 2x Exhaust Viton seals\u003c\/li\u003e\n\u003cli\u003e1x High-performance piston kit (piston, rings, pin, clips)\u003c\/li\u003e\n\u003cli\u003e1x Top end gasket kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"background-color:#fff3cd; border:1px solid #d4892a; color:#0E0D0B; padding:10px;\"\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e The piston, rings, valves, and pin clips are designed to work together as a system and are NOT compatible with OEM components. Valve guides are not included. This is a performance rebuild kit for experienced builders or professional installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShips fast from DuneGoonShop!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Parts Unlimited","offers":[{"title":"Default Title","offer_id":49094452838625,"sku":"0926-3400","price":736.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/files\/Screenshot2026-09-11164439.png?v=1789170357","url":"https:\/\/dunegoonshop.com\/products\/kibblewhite-top-end-kit-white-diamond-piston-yfz450r","provider":"Dune Goons","version":"1.0","type":"link"}