Description: This 80cc Petrol Gas Engine Kit is used to upgrade the regular bike to a motorizedbike. After converting your bike, you can ride faster and further buteasily,and then just enjoy your outdoor trip. The speed can reach up to 38km/h,which is the fastest but safe speed you can get. Of course, if you want to ride just with your feet,just stop your petrol gas engine ,and use the equipment of your bike. This engine kit fits most 24" or 26" bikes with V-frame. Features:.