Between 55-60mph my bike feels like it has a "rough spot" in it. It will smooth out above and below that speed, but within that range it feels like the tranny is slipping or something has a course vibration. I have TORs on my bike and it has the stock jetting. Could this possibly be a jetting problem? I live in west TN. Any help would be greatly appreciated.

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!!