Yamaha's all-new YZ450F is here, and we got a chance to spin some laps at Glen Helen Raceway. The bike has a new engine, frame, and electric start. It also got a wifi-accessible computer with its own app so you can tune the engine from your phone. And if the previous version of the bike turned you away because it had a wider feel than the other bikes in the class, Yamaha has addressed that with a frame and bodywork (which involved moving the radiator position and creating a new gas tank) that is slimmer. Take a ride along with Nick Evennou on the new bike.