Take a closer look at the new Suzuki race machine, the 2018 RM-Z450WS. Just from a quick peak, the new RM-Z450 has an all new chassis (frame and swingarm, all new bodywork and a heavily revised engine. The main focus is of course to get the bike lighter and thinner feeling. As for the engine, we've heard the intake track has been massaged and raised, to lessen the angle the air and fuel must travel, thus equaling more power.