I recently came across this rare behemoth - a Honda Rune. A cruiser built around the Goldwing engine. They were made by Honda as a statement, costing an estimated $100K each to produce and were sold for around $30K. It's also estimated less than four thousand were made. They were only made '04-'05 but, look like they wouldn't come out for ten years from now. If interested, here's an article about them.