I think you are putting too much emphasis on the kart speeds. They're pretty quick when your butt is literally 3/4" from the ground. If you're new to karting, the sensation of speed is incredible as you enter bumpy turn 1 at max velocity with nothing on the outside of the turn but a ditch and a haybale, with the fast people not lifting. And if you're a shitty driver like me you can get them to power-over with some steering input, and they will definitely spin out if you can't balance the brakes well. Turn 1-2-3 is basically a decreasing radius turn, and you only have rear brakes...!

How many G's do those things pull? 2+? My neck has never been so tired.