It looks like a Big Wheel.
Where do the pedals go?
That's exactly what it is, a big boy's Big Wheel!
The version I'm building is called a gravity trike and is not powered, you start at the top of a twisty hill and coast and drift to the bottom. Typically you go with a group of guys and there is a chase vehicle with a trailer to film and load everyone up at the bottom of the hill and head back up or find another hill.
Thanks again Dan for the seat! I really appreciate it!