Various sources claim that this mysterious new Yamaha is a successor to the Gen-RYU concept, is a gasoline/electric hybrid, uses an automatic transmission and will debut in production-ready form this fall. That the transmission is an automatic or a CVT seems evidenced by the large housing and the lack of a gear pedal, while the hybrid powertrain would seem to be verified by the dumpy styling. Far less reliable sources even claim that this bike is called the Yamaha Prius, which they seem to have conjured by combining a lack of mental prowess and overly enthusiastic use of Google Translate. What is it? Like everyone else, we haven't a clue. Care to guess?