The KX legacy represents a long line of champions. The drive to produce more has not slowed down. Our all-new flagship race machine, the KX450 motorcycle, offers next-level engineering and power to dominate the track. Over the decades, we've learned what it takes to win and stay on top. The KX450 embodies this legacy to the fullest. FEATURING: UPDATED 449cc 4-STROKE ENGINE NEW CYLINDER HEAD AND NEW STRAIGHT EXHAUST PORT AND CENTER EXHAUST NEW POWER MODE SELECTION WITH A HANDLEBAR-MOUNTED SWITCH NEW RIDEOLOGY CONNECTIVITY - CHANGE ENGINE MAPPING WITH YOUR SMARTPHONE NEW KAWASAKI TRACTION CONTROL (KTRC) WITH A HANDLEBAR-MOUNTED SWITCH NEW BREMBO BRAKE COMPONENTS FOR INCREASED CONTROLLABILITY ERGO-FIT ADJUSTABLE COMPONENTS FOR RIDE POSITION OPTIMIZATION ADDITIONAL VEHICLE FEATURES: NEW lightweight aluminum perimeter frame for improved handling NEW muffler position for improved mass centralization NEW ODI lock-on grips NEW quick-release side cover offers tool-less air filter access NEW radiator shrouds shape for improved riding position NEW rear fender Coned Disc-Spring Hydraulic Clutch