I brought that up because not long ago I bought a 2nd 04 (have since sold it) and at about those rpm's it had this STRANGE rubbing squeal kind of noise, really weird kind of hard to explain it. Really had me concerned for a day or two. One day when it happened for what ever reason I put my hand on the tank and it stopped! Started to trace it down and figured real quick that the PO had the tank off and more than likely had droped the rubber cuhsions out of the inside of the attachment wings, very common they fall into what I call never land!! Anyway, he did put some kind of bushings but put them on the outside of the wings, not the inside!!! Is a wonder he did not crack the tank!! Actually did find both of them down in never land (dark places like fan shroud, and one was actually inside the top back indent in right ear!) Anyway that sound was the tank. My advise to anyone pulling tank is to take a minute and glue those rubber pieces in so they cant fall out on install!
04-3,200 miles bought July 2011 with 928 miles. Loaded with acessories to many to list here, see my albums for more details! I also make a custom tank bib specific for the 750 if anyone is interested, ck my albums for some pics.