2015 Suzuki Motor of America Inc. 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 449 cc 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! Motorcycles Motocross DX0117167431901500289 DX1 ...