Depending on that behavior you should have a pretty good idea if you need more or less fuel. Is it rich or lean? From there begin with the mixture screws. Lean or richen the pilot circuit one-quarter turn at a time. Rev the engine, listen, feel, and repeat. If you get a nice, stable idle, you’re good to go. If you can’t get that nice idle without going to the extreme edges of the mixture screw adjustments, say one turn to a turn and a half from the starting point, you are going to have to go up or down a pilot jet size. When you change that jet make sure you put the mixture screws back to the standard 1.5 or 2.5 turns out before beginning the process again.