{"product_id":"hoca-50mm-qmb139-performance-cylinder-kit","title":"SSP-G 50mm QMB139 Performance Cylinder Kit","description":"\u003cp\u003eSSP-G 50cc QMB139 4-stroke 50mm, Racing Big Bore Cylinder Set. Kit includes cylinder, piston, rings, piston pin, cir clips, head gasket, and base gasket. \n\n\u003cbr\u003e \n\n\u003cbr\u003e \n\nPerformance items are not returnable.  \n\n\u003cbr\u003e \n\n\u003cbr\u003e \n\n  \n\n\u003c\/p\u003e\u003cp\u003e \n\n  \u003cspan\u003eThe supplier recommends that you use the QMB139 performance cylinder head (see Related Items) with this set as some stock cylinder heads will not fit. Use with an un-modified stock head can cause serious engine damage.\u003c\/span\u003e    \n\n\u003c\/p\u003e \n\n\u003cp\u003e \n\n  \u003cspan\u003e*You may need to modify your engine case to accommodate the larger cylinder.\u003c\/span\u003e \n\n\u003c\/p\u003e\u003cspan\u003eThe supplier recommends that you use the QMB139 performance cylinder head (see Related Items) with this set as some stock cylinder heads will not fit.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e \n\n\u003cul\u003e \n\n\u003cli\u003eUpgrades to 80cc  \n\n\u003c\/li\u003e\n\u003cli\u003eCylinder Bore: 50mm \n\n\u003c\/li\u003e\n\u003cli\u003eCylinder  Sleeve Outer Diameter: 54.9mm   \n\n\u003c\/li\u003e\n\u003cli\u003eWrist Pin Diameter: 13mm  \n\n\u003c\/li\u003e\n\u003cli\u003eTotal Piston Height: 34.8mm  \n\n\u003c\/li\u003e\n\u003cli\u003eCompression Height (from center of wrist pin hole to top edge of piston): 18.3mm\u003c\/li\u003e\n\u003c\/ul\u003eBaja SC50-P, Jalon X8 Retro 50cc, Lifan, Panterra Fusion 50cc, Qingqi QM50QT-4G, Qingqi QM50QT-6V, SUNL, Schwinn, Strada, Various unlisted makes\/models","brand":"SSP-G","offers":[{"title":"Default Title","offer_id":67964545564993,"sku":"169-54","price":121.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/452040.jpg?v=1792945431","url":"https:\/\/azscooterparts.com\/products\/hoca-50mm-qmb139-performance-cylinder-kit","provider":"AZScooterParts","version":"1.0","type":"link"}