How many miles are on your bike? I ask because somewhere along the line mine mellowed out a little. It's still a little wound up at highway speeds, but it doesn't sound like it could fly apart.
Also, when I replaced the tires I put a 170/80 on the rear. It has an ever so slightly larger profile. I don't know if this helped any with the revs (the "mellowing" occured before I did the tires), but I think it brought the speedometer a little closer to true.
My biggest fear is when I die, my wife will sell all my guitars for what I told her I paid for them.