There are three types of adult kart sprint racing out here.
1. 4 cycle motors are 12.5hp to 15 hp. This is good low cost racing. At IMI they run 62 second lap times.
2. TAG touch and go motors have around 30hp and run IMI lap times in the 56 second range. It’s more money than 4 cycle but they have more speed.
3. Shifters which are basically in 40+hp range. They are the fastest and the most expensive. I think they run 52 seconds at IMI. Dennis is right, don’t start in shifters.
You can rent 4 cycle and TAG karts at Action Karting and IMI. If you go on the weekend, there will be racers testing and tuning there. Just go up and start asking questions. You will find racer’s to help you in any of these levels.
Enjoy…