2011 Kawasaki Ninja 250R, Ready - Affordable, Fuel-Saving Fun For those beginning their two-wheeled journey, the Ninja 250R sportbike has always been a great option to start. Its low seat height and peppy engine translate into hours of fun for both novices and veterans. Though its engine may be compact, its eight-valve cylinder head means a rider can wring every bit of enjoyment from each twist of the throttle, from idle to redline. And with sharp styling that matches its supersport siblings, the Ninja 250R looks fast even while standing still. Best of all, the 250R is a great value, with an affordable purchase price and excellent fuel economy.