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. 2015 Kawasaki Ninja? 650 Ninja? 650 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. Motorcycles Sport...