2015 Suzuki RM-Z450, The RM-Z450 continues to evolve for 2015, delivering a higher level of performance while maintaining the great balance of the current model. The 449cc 4-stroke liquid-cooled DOHC 4-valve fuel-injected engine along with new performance upgrades straight from the factory is the reason why champions choose Suzuki!Champions Choose Suzuki...and Suzuki supports future champions! In addition to all the high-tech features and race-winning performance of the 2014 RM-Z models, Suzuki offers the best amateur racing program around!