The Yamaha YZ450F was the winner of the 2015 Dirt Rider Motocross Shootout for a host of reasons. A strong engine character, comfortable suspension (with a spring fork we might add), and a balanced feeling chassis on the track made it hard to deny it the top spot. For 2016 Yamaha engineers didn't rest as they went to work with a host of refinements for the 2016 YZ450F. For example, they updated the intake and exhaust cams for a smoother torque character, new shift stop lever design with a spring load increase and an updated shifter dog shape (both aim to help make it a smoother shift under power), the water pump has six holes added for increased pressure distribution, new handlebar mounted Launch Control System (LCS), top motor mount shape and thickness have changed and a 12mm increase of width to the frame at the swingarm pivot for an increase in rigidity balance, updated valving (fork and shock) and spring changes (shock only), fork clamp offset has changed from 22mm to 25mm to achieve better front tire traction, footpeg position has been moved down 5mm (from 2015), and finally a larger front brake rotor up from 250mm to 270mm to get "Big Blue" to stop sooner. How did all these changes work on the track? Yamaha had us out at Competitive Edge MX Park this week, so we got our first taste of how well the 2016 YZ450F can perform out on the track.