Block the throttle wide open (not from the bores) and carefully push out the emulsion tubes next to the slide needles. They come out the main jet hole. Clean the small holes in that tube before reassembly. Also, replace the orings on the main jets, unless the ones you have are completely resilient. Same for the o ring on the float needle seat if you are removing that. Basicaly replace any old oring you disturb with dissassembly as they won't reseal. If you haven't already, remove the slow jet a verify light will pass through them. If there is any crud builup behind th slow jets, make sure you clean that passageway, too.
Cheers,