its a known fact that they do all they can to pass emission regulations. And most monsters under 4k are a bit rough, and those that have had them tuned confirmed it transforms the bike and it feels much better from 2k to redline. Many think it's just part of the character of the bike, but bikes are rarely what they were designed to be to start with. Just like the 15T sprocket, clearly produced that way to lower revs to meet sound and pollution regulations (you can't even use 6th gear at highway speeds with the stock sprocket). I want my bike to run like it was designed to run. The 14T sprocket did help, but there's still some gains to be made down low to make the engine smoother.