Electric Karts are the way to go . I currently have one Ive been running for 2 years. 67 hp 104 lbs torque its fun still working out the bugs. Contact Harlan at hollywood electrics he can set you up with the Zero motorcycle running gear, it seems the easiest way to go. Im currently working on a twin motor electric, plan on setting some track records.I also race a 125 shifter kart it tries to kill you the , electric is so smooth and depending on the track we compete with either the TAGS or the shifters. Working through heat , charging and weight issues. Ive been in karting over 40 years, in a couple of years every track will have an electric class. No noise, minimal maintenance and faster than gas. Every year they make big improvements.