I wanted to build something like this since I saw one on Instructables about 13 years ago. Even bought a dead chainsaw and got it running, but had to give up on it as living space became more pressing :|
Next project for you? Use one of the spare crusty BMX frames you've got!
https://www.ebay.co.uk/itm/Monkey-Motorbike-Quad-bike-Go-Kart-machine/143405779907
@frankenbike