Hey guys, I have been trying to figure out what is causing my bike to do this, When I take off normal from a stop in first gear my bike will like lug or be really sluggish then seems to catch up and take off just fine. Now I have the stock pipes all gutted, gutted airbox with the bottom cut out, 150 jets and some fresh plugs. Do you think I would benefit form the TBS needles?? I have shims but I don't rally know what they do, I am guessing more fuel?? I build some 11 and 12 secound cars and tune them myself but this is just a new type of carb to me... thanks

05 America, cleared pipes,Gutted airbox, 150mains,bullet blinkers, billet mirrors,Iso-grips...