I saw these things long before '85, mid to late, 70's. A guy had a couple at a swap meet in Caroga Lake,NY, Royal Mountain Hill Climb.
One ran, sounded like shit and puked oil. The other was a show bike, both were choppers. I saw another in a dresser at Laconia around the same time. It didn't look bad but I didn't see it run.
Never heard anything good about them. Like was stated before, It was a great idea for a big HP motor on the cheap.
Parts weren't that easy to get back in the day. Most built their own machines with used or home machined parts... not from the Harley dealers.
They were bikers back then.