Before I start, let me say that my bike doesn't shake more than its supposed to. I've got a 125 in it, and at cruising speeds, I don't think that the thing vibrates even a little bit. Problem is, my wife doesn't seem to agree. Says after more than 15 minutes, her back itches and she can't feel her feet any more. I've checked everything (motormounts ect.) and everything is in good working order. So my question is this: Is there anything that I can do to eliminate some of the vibration that she seems to feel (mostly in the floorboards) or do I just need to get her some boots with 6 inch soles?