I dunno, if it's the same problem I had, it makes me think this is a belt/pulley issue. It happened a little when I had the stock pulley, more when I went to the shorter belt and the AF/X pulley. I bought a belt 1/2" smaller (81"), and the squeaking stopped totally. May be a problem with the belt tensioner. Have someone hit the gas a bit while you turn the bolt on the tensioner, assuming you hear it when you rev a bit.