170 MPH Go-Kart

They usually do this with a motorcycle engine, left lever is clutch right is gear shift... easy to do with a sequential box. Straight line would be pretty darn fast but I'm sure they handle like a pig with all the extra weight.... I raced karts for a long time and mine was only 1cyl Yamaha 100cc two stroke was "aerodynamically" challenged up to around 100 mph.