I know this has probably been asked many times, but here goes again. I just desmogged, jetted with the baja designs kit and removed the snorkel. It still backfires upon backing off the throttle. When putting in the new jet, I unscrewed the knob on the bottom of the carb (the one with the tab preventing this)2 1/2 turns. I don't have a manual so I don't know if this is the one they meant, could this be meesing me up? It runs well otherwise, the idle needed adjustment, but it seems to backfire more now than before, what gives? Thanks.