I remember when I was child and with my father we always gone to see karting race.
My brother at that time was running with 100 Cadet and then with the 100 National with excellent results at regional and national levels.
Perhaps, as in the driving simulator, I love the vintage races, but how about creating a kart like this in the photo?
100, air cooled, a few adjustments, rubber monomescola ... and so much heart to race!
That would be cool 8)