2015 Kawasaki Ninja 650, Passion and performance meet practicality. - Passion and performance meet practicality. The Kawasaki Ninja 650 is one of those rare sportbikes that encapsulates the passion and performance of a modern sportbike while also delivering the efficiency and agility of an urban commuter. Yet its overall ability shouldn’t be underestimated. Ninja 650-based race bikes have been successful in flat-track racing against larger displacement V-twin motorcycles, proving both the performance and durability of the parallel twin Ninja 650 engine.