2013 Kawasaki KX450F, PROOF in Five Back-to-Back TitlesThe KX⿢450F has been updated for 2013 to help continue its back-to-back string of recent championships. The string began with Monster Energy® Kawasaki⿿s Ryan Villopoto winning both the 2011 Supercross and 2011 Motocross titles, followed by leading the U.S. team to an overall victory at the Motocross of Nations, then Villopoto⿿s absolute domination of the Monster Energy Cup ⿿ which also earned him the Monster Million. Last but not least, Villopoto recently defended his Supercross title by winning the 2012 championship on his KX450F!