08-17-2013, 12:15 PM
Above 4500 rpm, I expect you are in the upper 70s, cruising along. Right about 80-85, my CB just hums. I don't notice much of anything untoward in the noise department. If anything, it smooths out. I say keep the revs in the 5000s... And always follow all traffic and safety laws for your part of the country...
