look up (paint can rattle)
Hi jthree,
In this forum, go to general tech talk, and apx page 7 find the issue called "paint can rattle" . This was an occuring problem on the 04-05 bikes that had a defective lower cam chain sprocket.. when you listen to the bike idle or at certain rpms it may sound like the little ball shacking in a paint can. My advice to you if this bike sounds like this, would be to run. Unless you want to spend a few thousand bucks to make it right.
I had an 05 that devoloped this and it was going to cost apx $3800 to fix, so I traded the bike in and got an 07 now. This is just my two cents worth. Rademis