The cdi didnt make your bike run as if you felt it needed to be jetted, the k/n filter is your culprit!
Moving the clips higher on the needle makes it leaner by allowing the needle to sit lower in the needle jet.Had one in my 06 Brute 750, had to pull carbs and move the clips up one setting to make it "fatter", in the midrange, did the trick however was a pain in the ass at Higher elevations, I would return it, and get your money back