{"product_id":"cylinder-head-assembly-49cc-50cc-gy6-4-stroke-139qmb-engine-replacement-compatible-with-chinese-atv-dirt-bike","title":"Cylinder Head Assembly 49cc 50cc GY6 4-Stroke 139QMB Engine Replacement Compatible with Chinese ATV Dirt Bike","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eUpgrade your ride’s engine performance with the \u003cspan style=\"font-weight: bold;\"\u003eRedCap Cylinder Head Assembly, \u003c\/span\u003edesigned for 49cc and 50cc GY6 4-stroke 139QMB engines. This high-quality replacement part is built for durability and smooth combustion, helping restore or even enhance the performance of your Chinese ATV, dirt bike, go-kart, or scooter. Whether you’re fixing a worn-out top-end or building a custom project, this cylinder head ensures proper valve timing, compression, and fuel-air mixture for a cleaner, more efficient burn. It's an ideal match for vehicles that demand consistent torque and power delivery in everyday and off-road use.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eThis assembly is a direct-fit replacement for a wide range of Chinese ATVs, dirt bikes, scooters, and go-karts. It’s compatible with models such as TaoTao, Jonway, Redcat, Kazuma Meerkat, CRF50, MTA1, Z50, and more that utilize the 139QMB engine platform. Suitable for both electric and kick-start engines, this part meets or exceeds OEM specifications and installs with standard hardware. Whether you're restoring a daily driver or tuning up a weekend trail machine, the RedCap Cylinder Head Assembly ensures lasting performance and peace of mind.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePerfect Fit: \u003c\/span\u003eSpecifically engineered for 70cc and 72cc GY6 engines, this kit ensures a precise OEM-style fit without the need for modifications. Each component is manufactured to exacting standards, allowing for seamless integration into your ATV or dirt bike’s engine system for a hassle-free rebuild or upgrade.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eWide Compatibility: \u003c\/span\u003eCompatible with a wide range of Chinese ATVs, dirt bikes, and go-karts equipped with GY6 4-stroke 70cc–72cc engines, including brands like TaoTao, Roketa, Jonway, Redcat, and Kazuma. This kit is the ideal replacement or performance upgrade for any GY6-based off-road vehicle needing a boost in power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eBoosted Performance:\u003c\/span\u003e Upgrade your engine's output with increased compression and better combustion efficiency. The RedCap kit enhances throttle response, torque, and acceleration, making it perfect for riders who want noticeable performance gains and smoother, more powerful off-road adventures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction: \u003c\/span\u003eMade from premium-grade aluminum alloy and other high-strength materials, this cylinder, piston, and gasket kit is built to endure extreme heat, friction, and rugged off-road conditions. Whether you're trail-riding or racing, you can rely on this set to deliver long-lasting engine durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation: \u003c\/span\u003eDesigned for DIYers and mechanics alike, the RedCap kit comes pre-sized and ready to install, minimizing the need for complex machining or fitting. With the included head gasket set, it guarantees a secure, leak-free seal, making your installation smooth, efficient, and time-saving.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEngine Compatibility:\u003c\/span\u003e 49cc \/ 50cc GY6 4-Stroke 139QMB\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eMaterial: \u003c\/span\u003eHigh-grade aluminum alloy\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit: \u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003eTaoTao, Jonway, Redcat, Kazuma Meerkat, Z50, CRF50, MTA1, and other 50cc class vehicles using the 139QMB engine. Compatible with both electric and kick-start engines.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53093654659183,"sku":"CYLD-0070","price":18.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/CYLD-0070_01_dcdd6d88-efe5-454b-a000-73930b0d0ee3.jpg?v=1778775859","url":"https:\/\/uedist.com\/products\/cylinder-head-assembly-49cc-50cc-gy6-4-stroke-139qmb-engine-replacement-compatible-with-chinese-atv-dirt-bike","provider":"United Express Distribution","version":"1.0","type":"link"}