I guess I'll have to take the pulley and scattershield off so I can take a gander at the magnet. I never thought about it being the tensioner, but I don't really understand how it could be that. Why would a failing tensioner make a single chirp noise at 3k rpms, but not one at 2k or 5k? Isn't the tensioner at a constant tension all the time? Would the bolt being loose on the tensioner cause the chirp? Do you guys think too large of a pulley gap could cause this problem? Just thinking about possibilities.