{"product_id":"bpratv-yz250-72mm-big-bore-cylinder-head-kit","title":"1999-2025 Yamaha YZ250 72mm Big Bore Cylinder Head Cometic Top Gasket Kit BPRATV","description":"\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 0.000000px; color: transparent;\"\u003eUpgrade Yamaha YZ250 with 72mm big bore cylinder head and Cometic gasket kit for improved performance reliability and sealing from 1999-2025 models. \u003c\/span\u003e\u003c\/p\u003e\u003cdiv style=\"max-width:800px;margin:0 auto;font-family:Arial,Helvetica,sans-serif;line-height:1.5;color:#222;\"\u003e \u003ch2 style=\"text-align:center;font-size:26px;margin:0 0 12px 0;\"\u003e \u003cstrong\u003eBPRATV Yamaha YZ250 72mm Big Bore Cylinder Head \u0026amp; Cometic Top End Kit 1999-2025\u003c\/strong\u003e \u003c\/h2\u003e \u003ch3 style=\"text-align:center;color:#c00;margin:20px 0 6px\"\u003e📖 Product Description\u003c\/h3\u003e \u003cp style=\"text-align:center;margin:0 20px;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e Upgrade your engine performance with the \u003cstrong\u003eBPRATV Yamaha YZ250 72mm Big Bore Cylinder Head Kit\u003c\/strong\u003e paired with a premium \u003cstrong\u003eCometic Top End Gasket Kit\u003c\/strong\u003e. Designed specifically for big bore applications, this high-performance cylinder head delivers improved combustion efficiency, stronger throttle response, and increased power output for your \u003cstrong\u003eYZ250 two-stroke engine\u003c\/strong\u003e. \u003c\/span\u003e \u003c\/p\u003e\n\u003cp style=\"text-align:center;margin:0 20px;\"\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp style=\"text-align:center;margin:0 20px;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e Built to work with \u003cstrong\u003e72mm big bore cylinders\u003c\/strong\u003e, this kit is compatible with OEM plated cylinders as well as top aftermarket brands like \u003cstrong\u003eCylinder Works, Forward Motion, Magnum, and Bronco\u003c\/strong\u003e. Whether you're rebuilding or upgrading your engine, this complete top-end solution ensures reliable sealing, durability, and race-ready performance. \u003c\/span\u003e \u003c\/p\u003e \u003ch3 style=\"text-align:center;color:#c00;margin:20px 0 6px\"\u003e🔥 Key Features \u0026amp; Benefits\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003e72mm big bore cylinder head\u003c\/strong\u003e engineered for increased power and compression\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eIncludes Cometic MLS head gasket\u003c\/strong\u003e for superior sealing under high performance conditions\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eCompatible with \u003cstrong\u003eOEM and aftermarket big bore cylinders\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eImproved combustion efficiency\u003c\/strong\u003e for better throttle response and torque\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eDirect replacement\u003c\/strong\u003e for multiple Yamaha OEM cylinder head part numbers\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003e1 Year warranty\u003c\/strong\u003e for added confidence and reliability\u003c\/span\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 style=\"text-align:center;color:#c00;margin:20px 0 6px\"\u003e📦 Product Contents\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eBPRATV 72mm Big Bore Yamaha YZ250 Cylinder Head (1)\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eCometic 72mm Complete Top End Gasket Kit\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eMLS (Multi-Layer Steel) Head Gasket\u003c\/span\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 style=\"text-align:center;color:#c00;margin:20px 0 6px\"\u003e✅ Compatibility\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eYamaha YZ250 2-Stroke\u003c\/strong\u003e (1999–2025)\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eFits all \u003cstrong\u003e72mm Big Bore Cylinders\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eCompatible with \u003cstrong\u003eOEM plated cylinders\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eCompatible with \u003cstrong\u003eCylinder Works, Forward Motion, Magnum, Bronco\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eReplaces OEM part numbers: \u003cstrong\u003e5MW-11111-02-00, 5MW-11111-00-00, 5CU-11111-00-00, 5UP-11111-00-00\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003cp style=\"text-align:center;margin:0 20px;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e \u003cstrong\u003e*Important Note:\u003c\/strong\u003e Cylinder, studs, and nuts shown in photos are \u003cstrong\u003eNOT included\u003c\/strong\u003e in this kit. Images are provided to showcase the \u003cstrong\u003ehigh-quality BPRATV cylinder head\u003c\/strong\u003e you will receive. Please check our other listings if you would like to bundle these components with your purchase. 😀 \u003c\/span\u003e \u003c\/p\u003e \u003ch3 style=\"text-align:center;color:#c00;margin:20px 0 6px\"\u003e❓ FAQ\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this kit include the cylinder?\u003c\/span\u003e \u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No. This kit includes the cylinder head and gasket kit only. Cylinder, studs, and nuts are not included.\u003c\/span\u003e \u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this compatible with aftermarket big bore kits?\u003c\/span\u003e \u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. It works with most aftermarket 72mm big bore cylinders including Cylinder Works, Forward Motion, and others.\u003c\/span\u003e \u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What type of head gasket is included?\u003c\/span\u003e \u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e A high-performance \u003cstrong\u003eCometic MLS (Multi-Layer Steel) head gasket\u003c\/strong\u003e is included for superior sealing.\u003c\/span\u003e \u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this a direct replacement for OEM parts?\u003c\/span\u003e \u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. This cylinder head replaces multiple Yamaha OEM part numbers and fits directly on compatible engines.\u003c\/span\u003e \u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003ch3 style=\"text-align:center;color:#c00;margin:20px 0 6px\"\u003e🌟 Why Buy from BPRATV\u003c\/h3\u003e \u003cp style=\"color: rgb(34, 34, 34); text-align: center;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e At \u003cstrong\u003eBPRATV\u003c\/strong\u003e, our promise is unwavering: \u003cstrong\u003eThe Best Parts. The Best Performance. The Best Price.\u003c\/strong\u003e We specialize in high-performance powersports components trusted by riders and builders who demand reliability and results. Every part is carefully selected for precision, durability, and real-world performance. Trust BPRATV to keep your \u003cstrong\u003eYamaha YZ250 two-stroke\u003c\/strong\u003e running at its best, \u003cstrong\u003eevery single time.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp style=\"text-align:center;margin:0 20px;\"\u003e \u003cspan style=\"color:#38761d;font-size:16px;\"\u003e \u003cstrong\u003e\u003cem\u003eUpgrade your YZ250 big bore performance with BPRATV precision engineering — order today!\u003c\/em\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp style=\"text-align:center;\"\u003e \u003cspan style=\"color:#0000ff;font-size:16px;\"\u003e \u003cstrong\u003eBPRATV - The Best Parts. The Best Performance. The Best Price.\u003c\/strong\u003e \u003c\/span\u003e \u003c\/p\u003e \u003cp style=\"text-align:center;\"\u003e \u003cspan style=\"color:#0000ff;font-size:16px;\"\u003e \u003cstrong\u003eBRAPPPPPPPPPP!\u003c\/strong\u003e \u003c\/span\u003e \u003c\/p\u003e \u003cp style=\"text-align:center;font-size:10px;color:#555;margin:20px 0 50px;\"\u003e© BPRATV LLC\u003cbr\u003e\u003cbr\u003e Due to the nature of high performance and racing applications, BPRATV LLC components are sold without express warranty or any implied warranty of merchantability or fitness for a specific purpose. BPRATV LLC shall not, under any circumstances, be liable for any specific, incidental or consequential damages, including, but not limited to, damage, or loss of property or equipment, loss of profits or revenue(s), cost of purchased or replacement goods, or claims of customers of the purpose, which may arise and\/or shall result from sale, installation or use of these parts. Installation of these parts may void vehicle manufacturers warranty coverage and\/or may cause the vehicle to be illegal in some locations.\u003cbr\u003e\u003cbr\u003e This product is exempt from the emission standards and related requirements of 40 C.F.R. §1051 as provided by 40 C.F.R. §1051.620, and California law. This product is sold only for use in connection with EPA-certified, purpose-built, nonroad vehicles used solely for closed-course, nonroad competition\/racing.\u003c\/p\u003e \u003c\/div\u003e \u003c!-- eBay Titles 1999-2025 Yamaha YZ250 72mm Big Bore Cylinder Head Cometic Gasket Kit BPRATV BPRATV YZ250 Big Bore 72mm Cylinder Head Cometic Top End Kit 1999-2025 Yamaha YZ250 Big Bore Cylinder Head Kit 72mm Cometic Gaskets 1999-2025 YZ250 72mm Big Bore Head Kit Cometic Top End Gasket Yamaha 1999-2025 Yamaha YZ250 Cylinder Head Big Bore 72mm Cometic MLS Kit 1999-2025 High Performance YZ250 72mm Big Bore Cylinder Head Cometic Kit 1999-2025 YZ250 Engine Top End Kit 72mm Big Bore Head Cometic Gasket 1999-2025 BPRATV Yamaha YZ250 72mm Cylinder Head Big Bore Gasket Kit 1999-2025 Yamaha YZ250 Big Bore 72mm Head Cometic MLS Top End Kit 1999-2025 YZ250 1999-2025 Big Bore Cylinder Head 72mm Cometic Gasket Kit BPRATV eBay Keywords yz250 big bore head yz250 72mm cylinder head yz250 top end kit yz250 cometic gasket kit yz250 big bore kit yz250 engine rebuild parts yz250 head replacement yz250 performance parts yz250 cylinder head kit yz250 gasket set SEO Keywords yamaha yz250 big bore cylinder head kit yz250 72mm cylinder head cometic gasket yz250 big bore top end kit yz250 performance cylinder head upgrade yz250 engine rebuild head kit yz250 big bore engine parts yz250 cometic top end gasket kit yz250 cylinder head replacement yz250 race performance head kit yz250 two stroke engine upgrade Meta Titles Yamaha YZ250 72mm Big Bore Cylinder Head Cometic Kit 1999-2025 YZ250 Big Bore Cylinder Head 72mm Cometic Gasket Kit BPRATV BPRATV YZ250 72mm Cylinder Head Big Bore Top End Kit 1999-2025 YZ250 Engine Big Bore Head Kit 72mm Cometic Gaskets Yamaha YZ250 Performance Cylinder Head Big Bore Kit 72mm YZ250 72mm Big Bore Head Replacement Cometic Kit YZ250 Top End Kit Big Bore Cylinder Head 1999-2025 BPRATV YZ250 Cylinder Head Kit 72mm Big Bore Upgrade YZ250 Big Bore Head Kit Cometic MLS Gasket Set Yamaha YZ250 Engine Head Big Bore Kit 72mm Performance Meta Descriptions Upgrade Yamaha YZ250 with 72mm big bore cylinder head and Cometic gasket kit for improved performance reliability and sealing from 1999-2025 models. High performance YZ250 big bore cylinder head kit with Cometic MLS gasket for 72mm builds delivering power and durability. BPRATV YZ250 72mm cylinder head with Cometic top end gasket kit designed for big bore engines and reliable sealing performance. Complete YZ250 big bore head kit with Cometic MLS gasket set for improved combustion efficiency and power gains 1999-2025. Upgrade your YZ250 engine with big bore 72mm cylinder head and Cometic gasket kit for maximum performance and reliability. YZ250 top end upgrade kit includes 72mm big bore head and Cometic MLS gasket for superior sealing and durability. Performance YZ250 cylinder head kit for big bore engines with Cometic gasket set for long lasting engine builds. Yamaha YZ250 72mm big bore head replacement kit with premium Cometic top end gasket set for racing performance. Increase YZ250 power with big bore cylinder head and Cometic gasket kit designed for high performance engines. YZ250 big bore engine upgrade kit with 72mm head and Cometic gasket for improved throttle response and power. SEO URL Handles bpratv-yz250-72mm-big-bore-cylinder-head-kit yamaha-yz250-big-bore-head-cometic-gasket-kit yz250-72mm-cylinder-head-top-end-kit-performance yz250-big-bore-engine-head-kit-cometic-mls yamaha-yz250-big-bore-cylinder-head-kit-1999-2025 --\u003e","brand":"BPRATV","offers":[{"title":"Default Title","offer_id":44396367970501,"sku":"CH2001-72\/C3592\/JT\/256786748922","price":149.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0593\/1083\/3861\/files\/yamaha-yz250-yz-250-big-bore-72mm-replacement-cylinder-head-cometic-gasket-kit-0_03ee5fdb-5a73-4b11-97c5-82b7dfb65286.png?v=1737423974","url":"https:\/\/bpratv.com\/products\/bpratv-yz250-72mm-big-bore-cylinder-head-kit","provider":"BPRATV","version":"1.0","type":"link"}