Chris - Long shot and doubt its the problem since your chassis is brand new. I bought a lightly used 2020 OTK and it oversteered very easily and on more than few occasion, the kart would spin out on the out lap. Also the braking was very nervous and it drove like a bucking bronco in some turns. I found that the right seat stay had a partially cracked weld at the crossbar. The crack was on the “inside” portion of the weld, so I couldn’t see it until the seat was out and if I weren’t suspicious wouldn’t even noticed the cracked paint at the base of the weld. To confirm there was a crack, I was able to slide a corner of a piece of paper into the crack. I got it TIG welded and that fixed the problem.