got new vance & hines big shots installed on 06 1300S. put in Dyno jet on 3rd notch using the recommended mj & 2.5 turns (stock air box & filter). im getting black smoke & it will only run if i keep the choke a quarter pull out. also stalls when slowing down or under 10 mph. i have only went around the block. Are any of you good at this kind of stuff & could you help me out? if not then i guess i see a trip to the stealership. thanks.