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by imglorp 2177 days ago
If I were doing this, and it looks like a load of fun anyway, I'd start with go-kart frame designed for a lawnmower engine. You'd get a roll cage, 5 point seatbelt, brakes, hand controls for throttle. Just add batteries, electric motor, and electronics. Like this one:

http://wesellit.ca/m/image/catalog/products/gokart200cc-roll...