But nothing compares to the ingenuity that the guys at Grind Hard Plumbing Co. used to build this ludicrous off-road electric shifter kart. Many of you may already know of the exploits of Grind ...

The latest is this one-of-a-kind shifter kit with a jet engine built by "Turbo" Tim Arfons, according to Winding Road, who is the son of Bonneville Salt Flats legend Art Arfons. The kart features ...

But something just seems sketchier, rawer even, about this 180 horsepower CBR 1000 swapped shifter kart from the folks at BUM (Building Ugly Machines). For starters, the kart they picked up on ...

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.