LIGHTER, SLIMMER, SHARPER, FASTER ,Yamaha took the championship winning YZ450F and made it even better—more powerful, lighter, slimmer, with enhanced overall stability and more agility than ever! Because the best don’t rest.450cc DISPLACEMENT ,240 lbs WET WEIGHT , 38.0 in SEAT HEIGHT , 58.3 in WHEELBASE . Power Tuner AppCompatible Like having factory team support in your pocket, Yamaha's groundbreaking Power Tuner App allows owners to adjust air/fuel mixture and ignition timing to tune engine performance for track conditions, record race log information and monitor a range of data such as maintenance and system diagnosis, engine run time and more. Features include an intuitive “Simple Tuning” slide bar for quick engine mapping adjustments, Traction and Launch Control tuning, lap timer, along with helpful engine and suspension tuning guides. Best of all, it's free-of-charge.