Please take a little more time while your typing, so people can read it. I still dont know half of what you said.
Ok, what have to done for your airbox besides an airfilter? Have you taken the snorkel or lid off? I would completely clean out both carbs, clean airfilter, and then get a in-line fuel filter (catches all the trash in your gas). You might put in a new plug on the right side also, because it might be fouled.
Also, is your choke tube still running between the carbs? That might cause the carbs to act up.