{"product_id":"39mm-gy6-50cc-139qmb-piston","title":"39mm GY6 50cc (139QMB) Piston","description":"\u003ch2\u003e39mm Piston for 50cc QMB139 Engines\u003c\/h2\u003e\u003cp\u003eBuilt for 50cc 4-stroke QMB139 engines, this 39mm piston is a core part of the engine. It helps keep a firm seal inside the combustion chamber. Swapping out a worn piston and its rings can cure problems such as smoke, heavy oil use, and weak compression. If you're looking at other \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc scooter parts\u003c\/a\u003e, this one is worth considering for keeping your engine running well.\u003c\/p\u003e\u003ch3\u003eSigns It Needs Replacing\u003c\/h3\u003e\u003cp\u003eThink about replacing this piston if the engine starts to smoke or loses power, since these can point to worn rings. Keeping this component in good condition supports engine performance and helps your scooter last longer.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 39mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Height:\u003c\/strong\u003e 33mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston Pin:\u003c\/strong\u003e 13mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression Height:\u003c\/strong\u003e 17.25mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCirclips:\u003c\/strong\u003e Included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e 50cc 4-stroke QMB139 engines (39mm bore), GY6 type\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eCompatible with:\u003c\/p\u003e\u003cul\u003e\u003cli\u003e50cc 4-stroke QMB139 engines\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Confirm the 39mm bore and 13mm piston pin match your cylinder, and only fit it in a QMB139 engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBrowse further:\u003c\/strong\u003e \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc Scooter Parts (139QMB)\u003c\/a\u003e · \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-pistons-rings\"\u003eScooter Pistons \u0026amp; Piston Rings\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":51135651872825,"sku":"TT-16257","price":12.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/39mm-gy6-50cc-139qmb-piston-1.jpg?v=1794349447","url":"https:\/\/www.trendtimes.com\/products\/39mm-gy6-50cc-139qmb-piston","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}