thats a bit old. you should see the version 2 of the gixxerkart so insane it can barely powerdown.
btw i bet your kidney is worth a lot more than a s2 license.
.....these guys really do some crazy 'conversions'.....putting a 1100 Honda Engine in a two seater kart.....just NUTS, but it seems to be HUGE FUN!!!!!
there is a guy who lives in germany and is a member of theminiforum.com, he has a ring prepped pickup mini, and a motorbike engined gokart. hes a good guy, but has a few screws loose when driving.
also, a mate of mine took his previously crashed zxr400 and stuck that engine in a custom spaceframe and my god that went.