I had one of these as a kid.
Below copied from here....
The folks at Parker Brothers Choppers have put together a bike that’s the baddest Big Wheel since The Shining
It’s based on the Green Machine, the toy all the cool kids on our block got to ride when we were kindergartners with tricycles. It’s got a massive 45-inch front wheel and, just like the real thing, steers from the rear. Power comes from an 80-cubic inch Harley-Davidson Evo engine.
The question is, of course, why?
“We had a Green Machine lying around the shop and we figured it would be a cool idea,” said Parker Brothers’ Jeff Halverson, who did 50 mph on this beast. “It rides crazy and is fast as hell. If it wasn’t for the rear tires we could have had it DOT approved.”
Instead of the Department of Transportation, however, Parker Brothers is looking for approval from the Guinness Book of World Records
as the world’s largest wheel on a motorcycle trike.