HMF, YFZ450R, Competition Series Exhaust and Fuel Optimizer Test: WITH VIDEO
July 15, 2015
As the most refined sport ATV on the market, Yamaha went to great lengths to make the YFZ450R a superb track performer and capable trail machine. Faced with meeting strict sound and emissions’ standards in order to be legal in public riding areas, the engine’s horsepower potential is robbed by a restrictive exhaust and a lean stock fuel map. HMF Competition Series Exhaust To maximize the potential of our stock
