Motorcycles Motocross 8022 PSN . 2015 Yamaha YZ450F Ton's of Power! A WINNER RIGHT OUT OF the CRATE. Completely re-engineered just last year with new EFI engine an entirely new frame minimized body work and new suspension components providing for excellent mass centralization and class leading 450 power with 250-style handling. the critics agree: the YZ450F is the one to beat...