Very nice. But yeah the E100 are 24 volt 100. watt. I always wanted to upgrade one with either 36 volts or just better batteries just to see what it would do. They're pretty cheap maybe I'll try. I have an E300 with an 36 volt computer stock 250 watt motor and three 9 amp hour batteries that I converted years ago, it would do anywhere between 18 and 21 mph. Tried that on the E200 and it was about 18 everywhereI made it gas because I got it out of a free pile cuz it was fried still have a few of the electric motors I'll never use. What's the voltage? 24 volt?