{"product_id":"39mm-qmb139-engine-kit-w-head-69mm-egr-pair","title":"39mm QMB139  engine Kit w\/ Head(69mm-EGR PAIR)","description":"\u003ch2\u003e39mm QMB139 Engine Kit with 69mm EGR PAIR Cylinder Head\u003c\/h2\u003e\n\u003cp\u003eBoost your GY6 50cc scooter or ATV with this comprehensive 39mm QMB139 engine kit, featuring an upgraded cylinder head designed for enhanced performance. This kit provides the core components for a significant displacement increase, bringing new life to your engine.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e39mm Bore Cylinder Kit\u003c\/strong\u003e: Delivers increased displacement for greater power output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e69mm Valve Cylinder Head\u003c\/strong\u003e: Equipped with larger 69mm valves for improved airflow and combustion efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEGR PAIR Style Head\u003c\/strong\u003e: Designed in the EGR (Exhaust Gas Recirculation) PAIR configuration for specific emissions compliance or performance tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston Kit with 13mm Pin\u003c\/strong\u003e: Includes a precisely machined piston and a 13mm piston pin for reliable operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality Gaskets\u003c\/strong\u003e: Comes with a complete CVT case gasket set tailored for the 39mm bore cylinder.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis 39mm engine kit represents a substantial upgrade over stock 50cc configurations, offering a noticeable power gain. Compared to standard 39mm bore kits, this package includes a performance-oriented cylinder head, ensuring that the increased displacement is efficiently utilized, setting it apart from basic big bore kits that might not optimize airflow.\u003c\/p\u003e\n\u003ch3\u003eKey Technical Advantages: Technology and Performance\u003c\/h3\u003e\n\u003cp\u003eThis kit leverages a larger bore and advanced cylinder head design to maximize the potential of QMB139 and GY6 50cc engines. The integration of 69mm valves within the EGR PAIR cylinder head allows for superior gas exchange, leading to increased horsepower and torque. Precision-engineered components ensure durability and optimal function for riders seeking enhanced acceleration and top speed.\u003c\/p\u003e","brand":"vendor-unknown","offers":[{"title":"Default Title","offer_id":42469662785685,"sku":"99515","price":99.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0621\/4425\/0005\/products\/vendor-unknown-parts-categories-default-title-39mm-qmb139-engine-kit-w-head-69mm-egr-pair-27068936618133.jpg?v=1781136066","url":"https:\/\/chinesepartsusa.com\/products\/39mm-qmb139-engine-kit-w-head-69mm-egr-pair","provider":"CHINESE PARTS USA","version":"1.0","type":"link"}