If you want faster acceleration, the easiest and most cost effective method is to change the sprockets, -1 tooth in the front or +3 teeth in the back, or some combination in between, or both. Your gas mileage will drop (as it will with jets and a pipe), but the bike will accelerate faster throughout the entire power range without any type of tuning. It's also very easy to undo if it turns out it's not what you're looking for. I'd try that before anything else.
"We didn't trade shoves; I did all the shoving." -Bobby Knight, 1981