Wut do I need to do about this. Got a thousand miles on my bike and has been doing this since I got it. (05 WR450) I think it sounds cool but not familiar enough with the fourstrokes to know whether or not I am damaging the head etc. Anybody Know? By the way this bike is plated and rolls the street/sidewalk/ditch/trail almost daily so the decel is sometimes a repetitious thing.