Pete, we tried to get a shifter kart class going but no one wanted to bite. As they are so expensive. The Little 6.5 Honda Clones were so cheap to play with and made good power and would carry the 350lb Kart (me included) around the track pretty darn quick. We even had a box stock class for the kids. You took the predator out of the box amd bolted it to the kart governor and all. Amd there was a fixed gear rule. It was a huge turn out for the kids and they had a ball. We would have 25 or 30 Karts on full green that looked like nascar on a pace lap.
lots of fun while it lasted.