{"product_id":"gy6-58-5mm-cylinder-head","title":"GY6 58.5mm Cylinder Head","description":"\u003ch2\u003eGY6 58.5mm Cylinder Head for 125cc and 150cc Engines\u003c\/h2\u003e\u003cp\u003eThis GY6 58.5mm cylinder head is built for 125cc and 150cc GY6 4-stroke engines, as well as vehicles that run 160-180cc cylinder kits. Its combustion chamber is deeper, which helps the fuel burn more efficiently. If you're planning a repair or upgrade, it's a \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 scooter part\u003c\/a\u003e worth considering for better engine output. Keeping this component in good shape is key to dependable running in your scooter.\u003c\/p\u003e\u003ch3\u003eConstruction and Design\u003c\/h3\u003e\u003cp\u003eThe head uses a distinctive layout aimed at better combustion. Exhaust valves measure 23mm across, and intake valves measure 27.75mm. Port diameters are 26.5mm for the exhaust and 27.5mm for the intake, so the head lines up properly and works as intended once it's part of the engine.\u003c\/p\u003e\u003ch3\u003eInstallation Considerations\u003c\/h3\u003e\u003cp\u003eBe aware that the exhaust threaded holes are shallow, at just 10mm deep. Depending on your setup, you may need to shorten the exhaust studs or use bolts to get a tight seal. Taking care with these points will help the engine run efficiently and reliably after assembly.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Valve Diameter:\u003c\/strong\u003e 23mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Valve Diameter:\u003c\/strong\u003e 27.75mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Port Diameter:\u003c\/strong\u003e 26.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Port Diameter:\u003c\/strong\u003e 27.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of Exhaust Flange Holes:\u003c\/strong\u003e 10mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e GY6 4-stroke engines: 125cc and 150cc, and engine-based vehicles with 160-180cc cylinder kits\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGY6 QMI\/QMJ 152\/157 (150cc)\u003c\/li\u003e\n\u003cli\u003eGY6 125cc and 150cc 4-stroke engines\u003c\/li\u003e\n\u003cli\u003eEngine-based vehicles with 160-180cc cylinder kits\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eBrowse 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":51135734612025,"sku":"TT-16396","price":134.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/gy6-58-5mm-cylinder-head-1.jpg?v=1794349647","url":"https:\/\/www.trendtimes.com\/products\/gy6-58-5mm-cylinder-head","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}