The all-new YZ450F redesign concentrated on everything you'd want out of a liquid-cooled four-stroke 449cc full-sized MX bike: weight reduction, improved handling, and more power. 

Yamaha claims their lighter, more compact engine and refined transmission units provide smoother, more even, and more accessible power throughout the rev range.  The company also says its redesigned and lightweight frame helps the handling characteristics on this new model mimic those of the YZ250F. 

The YZ 450F comes with an electric start, lightweight lithium battery, Yamaha Launch Control System, and adjustable performance connectivity via the Yamaha Power Tuner App, which you can access on your smartphone. 

The all-new YZ 450F will be available from dealers next month in Team Yamaha Blue and Gray for an MSRP of $9,299.