The fellow in this video, Mike, created a powerful electric motorcycle using simple retrofits. He took a Derbi GPR-50, removed the gas motor, and installed an electric drive system. It goes from 0 to 60 mph in 9 seconds, and it has a top speed of about 75 mph. In case you are interested in building one, most of the key parts were purchased from Thunderstruck-EV.Com and ElectricMotorSport.com. Electric MotorSport sells a range of electric motorcycles, including a Derbi GPR conversion. He also sells conversion kits and parts. The bike in this video used many of Todd's design elements. :: Via jiltedcitizen from Hugg.