Fit for most type 26 and 28 bikes, such as mountain bikes, road bikes, cruisers, choppers. 1x 44T Sprocket W/ 9 Hole Clamp Pads. 80cc 2-stroke bicycle motor kit bike motorized petrol gas engine full set comes with all needed hardware for easy installation. After converting your bike, you can enjoying riding at a faster speed, which can reach 38km/h.