I had a kart too, back in my teenage years. The kart was a homebuilt, and 'raced' on a dirt figure-eight track. The most fun was in the wet, with the hard packed, super-slippery surface.
The kart could also
usually make it across a ploughed paddock if the entry speed was high enough. Downside to that was that it would need attention from the welder after most outings. The rear wing, of course for show only, was usually the problem. Sorry Mike. Off 'track' a little
Cheers!
Glen