... of cylinder and distance: 39 x 41.5mm 2)Maximum power and relative rotation speed: 2.0kW 3)50CC,125CC,150CC ... ZNEN gas engine with power 50CC,125CC,150CC Diameter of cylinder and distance39 x 41 ... .5mmMaximum power and relative rotation speed2.0kW/8,000rpmBrand of crankcase lube10W ...