Features: 1) This is the second high rev 49cc 4 cycles 1.6 hp bicycle engine kit available from China. New design just released with gearbox engager control 2) USA EPA approved 4 cycle 49cc high rev engine; a pure pleasure to ride as compared to the high vibration 2 cycle engine found in other china kits 3) Faster and more powerful than 48cc 2 cycles, with speeds from 40km to 60km depending on rear chain sprocket ratio ordered 4) Centrifugal clutch operation for give gas goes 5) 7,000rpm or without governor or can be ordered with a governor to hold to max. of 5,500rpm 6) Everything included to mounted on a vee frame bicycle and operate like a moped