Well, here's what I would do---if it runs good and the plugs indicate you're A/F is correct, keep an eye on your plugs. If the continue to look good over the next tankful or so and it's running the way you want it--I'd leave it alone. Any pics of your set-up? That would give me/us a better idea and ballpark estimate of what type of air your pulling. If it starts to indicate lean on your plug checks, then you'll want to look into moving up in jet size.