{"product_id":"rdln-performance-gy6-72cc-47mm-piston-kit-with-rings","title":"RDLN Performance 139QMB 72cc 47mm Piston Kit with Rings","description":"\u003cp\u003eThis \u003cstrong\u003eRDLN Performance GY6 Piston Kit\u003c\/strong\u003e (SKU 1100-1571) is a 47mm replacement piston assembly for big bore kits installed on GY6 139QMB 50cc engines. A 47mm bore on the stock GY6 50 stroke works out to roughly 72cc, though kits of this size are commonly sold and searched for as 80cc big bore kits. The kit includes the piston, rings, a 13mm piston pin, and two pin clips, so a worn or scored piston can be replaced without buying a complete cylinder kit again.\u003c\/p\u003e\u003cp\u003eThis product is intended for off-road use only. This product is not intended for use on public roads or land.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e47mm bore:\u003c\/strong\u003e Matches 47mm big bore cylinders fitted to GY6 139QMB 50cc engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete piston assembly:\u003c\/strong\u003e Supplied with piston rings, a 13mm piston pin, and two pin clips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRebuild rather than replace:\u003c\/strong\u003e Restores a big-bore cylinder without the cost of a full kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable ring set:\u003c\/strong\u003e Ring pack sized to the 47mm bore for a proper seal and compression.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1100-1571\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston diameter:\u003c\/strong\u003e 47mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e Approximately 72cc (commonly marketed as an 80cc big bore kit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston pin diameter:\u003c\/strong\u003e 13mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded:\u003c\/strong\u003e Piston, piston rings, piston pin, 2 pin clips\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase engine:\u003c\/strong\u003e GY6 139QMB 50cc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e RDLN Performance (aftermarket)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eEngine code\u003c\/th\u003e\n\u003ctd\u003e139QMB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEngine family\u003c\/th\u003e\n\u003ctd\u003eGY6 4-stroke\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBase displacement\u003c\/th\u003e\n\u003ctd\u003e50cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCylinder bore required\u003c\/th\u003e\n\u003ctd\u003e47mm big bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePiston pin\u003c\/th\u003e\n\u003ctd\u003e13mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eCheck the engine code stamped on your scooter and measure your existing cylinder before ordering. This piston fits 47mm big-bore cylinders on 139QMB GY6 engines only, so confirm your bore diameter and 13mm pin size against the parts you already have. It will not fit a stock 39mm 50cc cylinder.\u003c\/p\u003e","brand":"RDLN","offers":[{"title":"Default Title","offer_id":67964783624513,"sku":"1100-1571","price":11.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/1100-1571_f2e00661-e2dd-4b15-8d0c-5787c2d389a4.webp?v=1792993071","url":"https:\/\/azscooterparts.com\/products\/rdln-performance-gy6-72cc-47mm-piston-kit-with-rings","provider":"AZScooterParts","version":"1.0","type":"link"}