2012 Yamaha YZ450F, The revolutionary Yamaha YZ450F has been the most advanced machine in its class since 2010 thanks to a rearward-slanted, reversed engine design.  For 2012 engineers revised the ECU for greater control and throttle response under acceleration, while meeting CO2 and noise standards.  The 2012 Yamaha YZ450F comes out of the factory more race-ready than ever.  New engine maps make for increased responsiveness, a fatter midrange powerband, and the same spirited performance at higher revs.  Available at Brennys Motorcycle Clinic in Bettendorf, Ia.  Call 563-359-7222.  Go to brennys dot com for more bikes and ATVs.