if you heard some karts shifting. thats becuase in some classes you can run a cr125 dirt bike engine. when i raced that class we gout up to 120 m.p.h. at road america in wisconsin. andthe karts that looked like mini indy cars they had the spoilers and everything. they have a dual 250cc motor on there kart they get up to 160 m.p.h. ish at road america.
it was my first time at that track andi got a 2nd on sat and a 3rd on sun.
How is the track on a bike? lie the offcamber left turn that goes down hill?
what kind of times did you get down to?