May not need to rejet. I would try the SCAR mod first. It will only cost you a few cents for the washers to put under the needle. 2 or 3 washers may do the trick. Worse case is that you have to rejet later...and only use factory pro jets. All others are crap. Definately do the PAIR mod. If you don't know how go to goheengarage.com. He has a step by step video of it. While you working on the carb, I would install Glen's permanent a/f screw. You can fine tune the carb with this tool so easily. Hope this helps...