2015 Kawasaki KX 450F, It s no secret that Monster Energy Kawasaki has been dominating the AMA Supercross and AMA Motocross series, with Ryan Villopoto piloting his Monster Energy® Kawasaki KX450F-based race bike to four consecutive AMA Supercross Championships in 2011 through 2014. Villopoto s skills are undeniable, but the race-ready Kawasaki KX450F allows the legendary racer to brake later, carve deeper and accelerate harder thanks to a technology package and powerful yet tractable motor unrivaled by any production motocross bike.* Price shown is based on the manufacturers suggested retail price (MSRP) and is subject to change. MSRP excludes destination charges, optional accessories, applicable taxes, installation, setup and/or other dealer fees.