The Kawasaki Ninja 650R is the U.S.-market, faire version of the motorcycle ER-6n, known as the ER-6f elsewhere in the world, introduced in 2006. The 650R is a middleweight twin motorcycle, designed for normal use on paved roads. It has modern styling and features, with low-seating ergonomics, a low center of gravity, and respectable, manageable power output, and has proven to be enough bike to keep seasoned riders entertained. The design of the bike is meant to maximize rider comfort and integration, and be aesthetically equivalent to larger, more powerful superbikes.