I guess this was bound to happen once we saw the Kawasaki Ninja ZX-25R become a real thing, as we are starting to hear murmurings that Yamaha may follow suit with a four-cylinder variant of its 250cc sport bike offering.
The rumor comes to us from Indonesia, with local site Iwanbanaran the first to report the story. Since then, the rumor has done the rounds in Europe, and now is making its way to North America.