could it be the jetting? sounds like you need to explaine what you have got and have done to it. new plugs and what not. when did it start doing this?
alright well i have power core 2 pipes with fatties and a k and n filter and a white brothers boost bottle i dont know what the jetting is because i baught it used from the dealer ship and he said he had it a little rich its got new plugs in i just replaced them its always happened my dad took it to them and they played with the parking break and then it ran fine and then i went out today and it ran like shit