Reminds me of an early '70s Kawasaki Big Horn (Big Hoax). It was set up so you could mount the axle in front, or the center or behind the fork sliders.
They were horrible handling pigs. I guess Kawasaki couldn't figure out how to make them handle, so they left it up to the customer! I guess the customers couldn't figure it out, either, they didn't produce that version very long.
Bare