the gasoline engine used for bicycle,the scale is four stroke(48cc).it is of high quality,it is Practical and beautiful. Bicycle Engine mode: F50Engine type Single cylinder,Air-cooled,4-strokeBore×stoke 45*40Displacement 48CCMax.Powe(kw/rpm) 1.2/6500Ignition Mode CDIStart mode Hand-operatedGW 11.5KgDimensions 41*27*35cmwithEPD exhaust bike engine