I think the restrictor plate is the snorkel inside the airbox that has a hole on each side for the carbs? It is maybe an internal baffle of some kind? I never thought of gutting my airbox and slipping some pod filters on. I would like to keep my airbox in a condition that will let me return to the stock air filter if need be. Is there much of a power difference between the TOR longs and the drop in K&N with the box and filter drilled vs. the T-bike and the pod setup?

06 BA, TOR's, 17T front sprocket, 135/42, needles shimmed, AI removed, drilled airbox, K&N air filter, desnorked, SM seat and risers, drag bars, pro-grips....let's ride!!