Greetings
i recently purchased a 2000 M2 Cyclone that came with a prospect hill air cleaner assembly already installed. i noticed that it is running super rich even with that free flowing intake in conjunction with an empty muffler(straight pipe essentially). my question is....
should i simply adjust the air/fuel mixture screw
or move the clip up a notch on the needle jet.

i have a 12mm colortune plug which should help set the mixture, right?
i know the carburetor is stock HD, but i have no idea about the jets themselves.

thanks
James