I grew up in a small town in Tennessee and can remember one of my cousin's getting a brand new 2 stroke trike that had just landed at our local motorcycle shop (1974?). It had about a 500cc twin cyl 2 stroke engine with an automatic two speed centrifugal clutch, large rear studded (off-road) tires and a red fiberglass body. You sat in it rather than on it. This thing would do bad-ass burnouts and would scream up to 100mph. Was one of the coolest things of it's time in my eyes. I tried to do a number of searches and couldn't come up with anything.
Anyone remember such a machine. I'm going to try and get hold of him to see if he remembers the details and make.