EC21 Product Catalogs - 60cc 2 stroke bike http://www.ec21.com/ec-market/60cc 2 stroke bike.html Gas Bicycles,Gas Bicycle 49cc-80cc (JSL-GE02)http://cnjsl.en.ec21.com/Gas_Bicycles_Gas_Bicycle_49cc--1771646_2521397.html2-stroke 2).Type of fuel mix: (16:1/20:1) 3).Displacement:49cc /60cc/80cc &nbs20090124