{"product_id":"airsal-50mm-big-bore-cylinder-kit-for-qmb139-50cc","title":"Airsal 50mm Big Bore Cylinder Kit for QMB139 50cc","description":" Airsal 50mm Big Bore Cylinder Kit for Kymco Agility 50 and QMB139 50cc Engines.\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e Kit includes cylinder, piston, rings, piston pin, cir clips, and gaskets. Aluminum cylinder construction for better heat dissipation. \u003cbr\u003e\u003cbr\u003eWhen used in conjunction with a stock crankshaft the total displacement comes out to 81.3cc! Your stock head can be reused. High compression piston included! .5mm taller than most standard 50mm big bore kits.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: rgb(255, 0, 0); font-family: Tahoma; background-color: rgb(255, 255, 255);\"\u003e*You may need to modify your engine case to accommodate the larger cylinder. Not compatible with Sym Symply 2. On some Chinese QMB139 engines, the cam holes may need to be enlarged.\u003cbr\u003e\u003cbr\u003e \u003cul\u003e \r\n\u003cli\u003eUpgrades to 81.3cc  \r\n\u003c\/li\u003e\n\u003cli\u003eCylinder Bore: 50mm  \r\n\u003c\/li\u003e\n\u003cli\u003eCylinder Sleeve Outer Diameter: 54mm\u003c\/li\u003e\n\u003cli\u003eCompression Height of Piston: 20mm\u003c\/li\u003e\n\u003cli\u003eCam Hole Diameter: 6.5mm\u003c\/li\u003e\n\u003c\/ul\u003eKymco, QMB139 50cc\/49cc , SYM, Various unlisted makes\/models\u003cp\u003e \u003c\/p\u003e\n\u003ch3 style=\"color:#983D3C;\"\u003eThis product is not intended for use on public roads or land.\u003c\/h3\u003e\u003c\/span\u003e","brand":"Classic Scooters","offers":[{"title":"Default Title","offer_id":47678060789925,"sku":"158-3","price":138.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/2627\/1141\/files\/158-3.webp?v=1774953835","url":"https:\/\/classicscootersusa.com\/products\/airsal-50mm-big-bore-cylinder-kit-for-qmb139-50cc","provider":"Classic Scooters USA","version":"1.0","type":"link"}