Matt was referring to stock carbs. You have a set of Keihin PJs. The carbs should be synced at idle and off idle so the carbs won't work against each other affecting performance.
I would stick with the proven performer....CPIs. I'm not saying Rockets aren't any good or they aren't better than CPIs. I'm glad I made the switch from T-5s. Its a totally different bike and I haven't even had a chance to fine tune it yet.