{"product_id":"genuine-gy6-big-valve-cylinder-head-58-5mm-2-valve","title":"Genuine\/GY6 Big Valve Cylinder Head (58.5mm, 2 Valve)","description":"\u003ch2\u003eLarge Valve Cylinder Head for Genuine Buddy and GY6 Engines\u003c\/h2\u003e\u003cp\u003eThis large valve cylinder head suits Genuine Buddy 125, 150, 170i, and Blur 150 models, along with a range of GY6 engines. It enhances airflow inside the cylinder, which contributes to stronger overall output. It is one of the \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 scooter parts\u003c\/a\u003e that support engine function by helping it breathe more freely.\u003c\/p\u003e\u003ch3\u003ePerformance and Compatibility\u003c\/h3\u003e\u003cp\u003eThis aftermarket head uses two valves, offering better airflow than standard units. It is designed for 157QMJ-based 125cc, 150cc, and 169cc engines, so it works well for riders wanting more engine performance. Confirm that your engine code includes \"QM\" or \"FM\" before ordering to ensure it matches.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cp\u003eThe head is built carefully to fit a variety of scooter models. Its dimensions are 7.5 inches long, 7 inches wide, and 2.75 inches high. It includes a 54mm stud spacing and a 5mm valve stem, which allow it to sit correctly on the intended vehicles.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 7.5\"L x 7\"W x 2.75\"H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Head Stud Space:\u003c\/strong\u003e 54mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Stem:\u003c\/strong\u003e 5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Manifold Bolt-to-Bolt Space:\u003c\/strong\u003e 45mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Threads:\u003c\/strong\u003e M6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Bolt-to-Bolt Space:\u003c\/strong\u003e 45mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Threads:\u003c\/strong\u003e M8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e GY6 150cc (157QMJ) engines with a 157QMJ-based code (for example 157QMJ, 161QMK, 152QMI)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eGY6 150cc (157QMJ)\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Compare the engine code stamped on your engine case with these listed codes: 157QMJ, 161QMK, 152QMI, 1P61QMK, YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ, 1P57QMJ, BN157QMJ, BN161QMK-A, or any other QMJ, QMK or QMI code.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere it goes:\u003c\/strong\u003e part #1 on the cylinder head diagram for the GY6 150cc (157QMJ).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAlso offered:\u003c\/strong\u003e \u003ca href=\"\/products\/gy6-150cc-157qmj-engines-cylinder-head-57mm\"\u003eGY6 150cc (157QMJ) Engines Cylinder Head 57mm\u003c\/a\u003e (57mm head, Blue Line brand).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOther versions:\u003c\/strong\u003e For a GY6 125 cc cylinder head that includes valve guides, see \u003ca href=\"\/products\/cylinder-head-with-valve-guides-for-genuine-gy6-125-cc\"\u003eCylinder Head (With Valve Guides) for Genuine, GY6 125 cc\u003c\/a\u003e. For a 61mm head made for 171cc kits, see \u003ca href=\"\/products\/gy6-big-valve-cylinder-head-61mm-171cc-kits\"\u003eGY6 Big Valve Cylinder Head - 61mm 171cc Kits\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop more:\u003c\/strong\u003e \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/chinese-scooter-parts\"\u003eChinese Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-cylinder-heads\"\u003eScooter Cylinder Heads \u0026amp; Valves\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"Default Title","offer_id":51138792292409,"sku":"TT-26770","price":121.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/big-valve-cylinder-head-58-5mm-2-valve-for-genuine-gy6-1.webp?v=1794377822","url":"https:\/\/www.trendtimes.com\/products\/genuine-gy6-big-valve-cylinder-head-58-5mm-2-valve","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}