I saw that bike at Daytona 1984. I do have a slide somewhere of it, but I doubt f I can find it in the near future. As I remember the case, it was a stock-looking Super Glide with an extra cylinder pointing forward like that on an Aermacchi 350cc. A guy was riding it along the beach. No way to tell if it was running on three cylinders or two.
Theory: Everything is perfectly right, but it does not work.
Practice: It works but you do not know how.
We combined theory and practice: Nothing works and nobody knows why!