I have an 05 model. Mine does it. Scared me at first but they all do it, and I have ridden my bike hard with no probs. I wouldnt worry about it mate. Gray.HI ALL.
i have a 06 636,and between 3-4,000 rpm i get a tapping sound from the airbox area,have been told by dealers its a kawasaki trait and they all do it.
above 4,000 it quitens down a lot and dont notice it,any comments would be greatfull.