Electro & Co. sells the electric motor kit for $7,500–though a sale is going on now–and you can pick up a shifter kart frame for under $1,000 on the used market. Then all you’ll need is a ...

It all leads up to the ultimate in karting: the 125cc shifter kart. With a top speed of 120 miles per hour, the shifter is no toy. "When you do open it up, my god, it goes fast," said Patrick.