Tune. Race. Win.Its new lightweight electric starter saves valuable seconds when it matters ? and with Yamaha?s exclusive Power Tuner app and adjustable mapping, it?s easy to choose the exact power profile for optimum race results at every track.The compact new chassis increases agility ? and new suspension systems deliver winning performance with class-leading feel. So expect more. Because the all-new Yamaha YZ250F gives you the highest level of tuneable performance ever seen in the 250cc class.To give you a real advantage, the all-new YZ250F comes with a new electric start engine equipped with a whole range of power boosting technology ? including a new forged piston, reprofiled cams and multi-angle valve seats that deliver exceptional power.