[Jim in S.C.]

I once had that same problem with a aluminum gear. I put a dial indicator on the outer edge of the gear and found a wobble in the gear. I found out that the gear mounting surface was out of square with the cam. I had it turned square put it back together and the noise went away. What has always puzzled me is that after paying the price for a touring cam. The cam grinder didn't check every dimension before sending me the cam shaft.