Once installed and on the track the Honda’s exhaust note turned from a high-pitch 250F-esque to a deep, throaty, more traditional 450 factory racebike sound. The crack of the throttle (or rpm response) is slightly smoother and less crisp, but bottom-end pulling power is increased over the stock muffler. Rolling out of corners in second gear feels like the rear wheel had even more traction than stock and was more controllable while accelerating out of hard-packed corners. The slightly smoother rpm response doesn’t take away the Honda’s excitement anywhere in the power; it just helps you gain a little more control coming out of corners. The midrange pull is healthier than stock, and while the stock system had a tough time pulling third gear in tighter corners, the Yoshimura system will give you an easier time doing so. With just the flick of the clutch lever the Honda will be in the meat of the power once again and have you down the straight in a hurry.