Ive got 2 carts, one has a 50cc 5 speed 2 cycle with hydro rear brakes, dunlop slicks and laid back racing seat, made from scratch, the other was modified from an existing chassis and has a Honda CB350 4 cycle 5 speed, slicks, hydro brakes, electric start, and blows past topped out in 6th gear Honda cr125s like they are standing still, top speed is over 120 mph!
I was about to ask you if that's an animal engine. I used to race go-karts for years. No, not the ones you find @ family tracks, the actual competitive racing ones. Looks almost exactly like one...lol