Yes it is when the throttle is retarded. Just pulses (jerks) if you don't keep a little throttle on it. The bike is an 08 and it seems to be worse in the mountains or hills. Downhill with a slack throttle is the worst. I rode it today on flat land and hardly noticeable . Just noticing more things since some mods. New 2 into one exhaust, Cobra 2000 fuel pro processor, Barons BAK, Windscreen. It was a neglected bike I bought and I am trying to make it mine . The air whistle is something else I don't like since putting on the BAK. any suggestions on that other than putting factory intake back on. Coils relocated and custom side covers installed. Do I just learn to live with it?