Both the ER-6n and the revised-for-2009 Ninja 650 share many evolutionary changes. There's a new tank shape and seat to improve ergonomics and make it easier for shorter riders to touch at least toes down at stop signs. Very low-effort controls were a design mandate of these models from the start, and that carries over onto the '09 model—you don't need big mitts to pull the clutch or work the throttle. And as compliant as the engine is, some complained that the 650cc eight-valve parallel-Twin was a bit buzzier than they would have liked. But instead of quelling it at the source (expensive), Brand K's engineers went after the bad vibes further down the line. The frame itself has revised stiffness (more rigid here, less there) and the rear engine mount is now rubber instead of solid. Rubber handlebar mounts and footpeg coverings further insulate rider and passenger from buzz. Hey, maybe the "ER" in ER-6n stands for "Extra Rubber?"