11stryker said:I went one step beyond changing to the K&N Filter yesterday. I took the air filter housing off and cut out the back lower portion and entry tube to open it up and let more air in . Can't even tell I did it with housing reinstalled-BUT WOW_- now there is a Sweet Rumble from the the air cleaner when you get on it. Accents the CAT removed exhaust perfectly. And the performace is much better with no bad side effects. Even raised front wheel slightly off ground a few times at takeoff. I am no wheelie rider- but someone that knew what they were doing could easy pull one off!!