{"product_id":"yamaha-yz450f-98mm-99mm-cometic-big-bore-gasket-kit-kpmi-red-viton-valve-seals","title":"Yamaha YZ450F 98mm 99mm Cometic Big Bore Gasket Kit + KPMI RED Viton Valve Seals","description":"\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 1px; color: transparent;\"\u003eC3178,C3178-EST,C3279-EST,2S2-11181-00-00,2S2-11351-00-00, 2S2-11181-00-00, 2S2-11351-00-00 4FM-12213-00-00, 3VD-14613-01-00, 33M-12119-00-00, 4SV-12119-00-00\u003c\/span\u003e\u003c\/p\u003e \u003c!-- 🔥 BEGIN LISTING 🔥 --\u003e \u003cdiv style=\"max-width:800px;margin:0 auto;font-family:Arial,Helvetica,sans-serif;line-height:1.45;color:#222;\"\u003e \u003c!-- ⭐ TITLE ⭐ --\u003e \u003ch2 style=\"text-align:center;font-size:26px;margin:0 0 12px 0;\"\u003e \u003cstrong\u003e🔥 Yamaha YZ450F \/ WR450F \/ YFZ450R 98mm 99mm Big Bore Cometic Top End Gasket Kit + Viton Seals 🔥\u003c\/strong\u003e \u003c\/h2\u003e \u003c!-- 🛠️ PRODUCT OVERVIEW --\u003e \u003ch3 style=\"color:#c00;margin:20px 0 6px;\"\u003e🛠️ Product Overview\u003c\/h3\u003e \u003cp\u003e Built for power and reliability, this \u003cstrong\u003eCometic 98mm\/99mm Big Bore Top End Gasket Kit\u003c\/strong\u003e is designed to support high-performance upgrades on Yamaha 450cc engines. Combined with \u003cstrong\u003eKibblewhite Precision’s Legendary Red Viton valve stem seals\u003c\/strong\u003e, this complete top end solution ensures long-lasting sealing under high-compression, high-RPM builds. \u003c\/p\u003e \u003c!-- ✅ WHAT’S INCLUDED --\u003e \u003ch3 style=\"color:#c00;margin:20px 0 6px;\"\u003e✅ What’s Included\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCometic MLS Cylinder Head Gasket\u003c\/strong\u003e – 98mm bore, 0.027\" thick, multi-layer steel design\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBase Gasket\u003c\/strong\u003e – OEM match for fit and performance\u003c\/li\u003e \u003cli\u003e\u003cstrong\u003eTensioner Gasket\u003c\/strong\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrong\u003eExhaust Gasket\u003c\/strong\u003e\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eKibblewhite Red Viton Valve Stem Seals (Qty 5)\u003c\/strong\u003e – High-temperature, high-performance seals\u003c\/li\u003e \u003c\/ul\u003e \u003c!-- 🚚 MODEL FITMENT --\u003e \u003ch3 style=\"color:#c00;margin:20px 0 6px;\"\u003e🚚 Model Fitment\u003c\/h3\u003e \u003cp style=\"margin-left:20px;\"\u003e • Yamaha YFZ450R \u0026amp; YFZ450X (Fuel Injected) – 2009 to 2025\u003cbr\u003e • Yamaha WR450F – 2007–2009, 2011–2015\u003cbr\u003e • Yamaha YZ450F – 2006–2009 \u003c\/p\u003e \u003c!-- 🔁 OEM CROSS REFERENCE --\u003e \u003ch3 style=\"color:#c00;margin:20px 0 6px;\"\u003e🔁 OEM Replacement\u003c\/h3\u003e \u003cp style=\"margin-left:20px;\"\u003e Replaces OEM Part Numbers:\u003cbr\u003e 2S2-11181-00-00, 2S2-11351-00-00, 4FM-12213-00-00,\u003cbr\u003e 3VD-14613-01-00, 33M-12119-00-00, 4SV-12119-00-00 \u003c\/p\u003e \u003c!-- 🏆 BENEFITS TABLE --\u003e \u003cdiv style=\"display:flex;justify-content:center;margin:25px 0;\"\u003e \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse;text-align:left;min-width:100%;\"\u003e \u003cthead style=\"background:#f4f4f4;\"\u003e \u003ctr\u003e \u003cth\u003eAdvantage\u003c\/th\u003e \u003cth\u003eWhat It Means for You\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCometic MLS Technology\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSuperior seal at high compression and temperature\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003e98mm\/99mm Big Bore Compatibility\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003ePerfect fit for upgraded high-performance cylinders\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eKibblewhite Red Viton Seals\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003ePrevents oil leakage and resists extreme heat – no blue seal knockoffs\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eOEM Replacement\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eDirect replacement for multiple Yamaha part numbers\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMade in USA\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eReliable construction from trusted brands\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e \u003c!-- ❓ FAQ --\u003e \u003ch3 style=\"color:#c00;margin:20px 0 6px;\"\u003e❓ FAQs\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCan I use this on stock bore?\u003c\/strong\u003e – No, this kit is for 98mm and 99mm big bore upgrades only.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAre the valve seals genuine Kibblewhite?\u003c\/strong\u003e – Yes, you receive authentic Kibblewhite RED Viton seals.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIs this kit complete?\u003c\/strong\u003e – Yes, includes all necessary gaskets and seals for a complete top end rebuild.\u003c\/li\u003e \u003c\/ul\u003e \u003c!-- 🌟 WHY BUY --\u003e \u003ch3 style=\"color: rgb(204, 0, 0); margin: 20px 0px 6px; text-align: center;\"\u003e\u003cspan style=\"\"\u003e\u003cspan style=\"font-size: 16px;\"\u003e🌟 Why Buy from BPRATV?\u003c\/span\u003e\u003c\/span\u003e\u003c\/h3\u003e \u003cp style=\"margin-left: 20px; text-align: center;\"\u003e \u003cspan style=\"\"\u003e\u003cspan style=\"font-size: 16px;\"\u003e\u003cem\u003e\u003cstrong\u003eBPRATV – The Best Parts. The Best Performance. The Best Price.\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003e We only sell brand-new, top-tier components from the best names in the industry.\u003cbr\u003e \u003cstrong\u003eBRAPPPPPPPPPP!\u003c\/strong\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e \u003c!-- 🎯 CALL TO ACTION --\u003e \u003cp style=\"text-align: center; margin: 40px 0px 12px;\"\u003e \u003cstrong\u003e\u003cspan style=\"\"\u003e\u003cspan style=\"font-size: 16px;\"\u003ePower up your YFZ450R or WR\/YZ450F with this top-tier gasket + seal combo kit! 🏁\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e \u003c\/p\u003e \u003c!-- 🔚 FOOTER --\u003e \u003cp style=\"text-align:center;font-size:12px;color:#555;\"\u003e © BPRATV LLC\u003c\/p\u003e \u003c\/div\u003e \u003c!-- 🔥 END LISTING 🔥 --\u003e","brand":"BPRATV","offers":[{"title":"Default Title","offer_id":44783811657925,"sku":"267273329274\/JT\/C3178\/71014","price":49.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0593\/1083\/3861\/files\/yamaha-yfz450r-98mm-99mm-cometic-big-bore-gasket-kit-kpmi-red-viton-valve-seals.png?v=1748838035","url":"https:\/\/bpratv.com\/products\/yamaha-yz450f-98mm-99mm-cometic-big-bore-gasket-kit-kpmi-red-viton-valve-seals","provider":"BPRATV","version":"1.0","type":"link"}