bigsteve,
Supposedly, there are 2 rubber or plastic pieces in the airbox, 1 at the passage to each carb. Pull the plate/snorkel off and pull the filter out and you are supposed to be able to stick your finger in each one and yank it out, thus allowing more airflow into the carb.
I say supposed because my '03 TA never had any in it from the factory, so I never had to do this myself. Check yours and see....