I agree, stay away from kits. Only buy genuine manufacturer jets. Before you start screwing with jetting, you first need to plug chop it at idle, hald throttle (midrange) and WOT (full throttle). You need to do this so you can get a base line on how all 3 ciruits are jetted, and how well the engine is able to burn the air & fuel that the carb is feeding it.
If you don't, you can this into a major jetting headache for yourself. You may find that the idle and WOT ciruits are good, and only need to adjust the needle. Or, you may find that idle circuit is damn close, and you can just tweek the mixture screw, etc... There are many different combos of what it "could" need.