Hi, thats unusual for the carb to be blocked, if your request is what should i do, the best bet would be to remove the carbs, and the jets including floats and needles use compressed air and try to remove the blockage, you could try using some carb cleaner and alowing it to soak in to clear the blockage, if all else fails you could try having the carbs cleaned using a sonic device,

hope this helps and thanks for using Fixya
Paul