Most modern bikes spend most of their time at 3k? Are you in earnest? A new exhaust, depending on if it is just a new muffler, or a cat bypass and free flow muffler, will at minimum require changes in jets to compensate for the lean conditions on carb bikes, and re-flashes of the ECU on injected bikes (Or piggyback controllers) to ensure the bikes don't have AT MINIMUM issues with throttle response and flat spots, and to avoid potentially sufficiently lean conditions to damage the motor. Will this happen in the first 100 miles? Generally no. As an engineer, I simply wanted to ensure people had the best information on the subject. You may be happy with your modifications.