Personally I would go to a junkyard and go find a carb and harmonic balancer to slap on it and test it right. If it works, power to ya, if not,... your not really out all that much money and could probably hock the parts on here for what you paid.
You're going to be trading a Go Kart for it, and you're not interested in getting it running to test drive it?Is there anything I should look at especially/common problems. I may just be trading a go-kart for it and it needs some wheels. So getting it up and running for a test drive isn't really an option.