The Kawasaki KX450–SR is the pinnacle of Kawasaki’s four-stroke motocross GP technology, with class- and race-leading power delivery controlled by state-of-the-art suspension, lightweight high-tech chassis and factory innovations.
The KX450–SR, the result of ongoing development by technicians from the Japanese factory’s Akashi race department and the KRT base in Europe, will be campaigned in the FIM World MXGP Motocross Championship by France’s Romain Febvre and Australia’s Mitch Evans under the KRT banner for 2023. The result of months of secret testing and innovation, the SR designation shows that this is a true factory special representing a natural cohesion of production line components and unobtainable exotic items such as Factory Showa or KYB suspension. Such is the integrity of the KX package, the mount of production-based parts is reassuring for non-factory riders whilst exotic parts take the package to a level whereby World Championship podiums are a realistic expectation.
Therefore, 'SR' also reflects many of the same outstanding features found on the standard KX450 machine available from any Kawasaki off-road dealer with the leanest, most ergonomically-precise chassis ever on a KX450, a perfected E-starter with automated centrifugal decompression system and the exclusive finger-follower valve actuation, a valve train designed by Kawasaki’s MotoGP & World Superbike engineers which enables larger-diameter valves and more aggressive cams to derive the optimum from a new engine which boasts an increase in peak power of approximately 2.5 kW (3.4 PS) whilst maintaining Kawasaki's renowned low-rpm performance through a flatter torque curve to make it even easier to get on the gas at all times. Additionally, it sees a reduction in valve train weight which is welcome in the GP paddock where every gramme counts.
With premium retail models dubbed “SR” – complete with selected high end component additions – available in the booming American market, the model designation SR is reserved for the most exclusive track and retail products in the KX family.