Anyone else get tappet like noise around 2.2k Rpm ? (thats when it is worst). Around town with walls / hedges etc to bounce the sound back. It just seems a little too much for 7k miles on the clock ! Windows shut and you barely hear a thing. If you rev it at 2.2k Rpm at a stand still wth the windows open you can hear it clearly, it is still there above those revs but that is when it is worst. Any ideas ?