Thinking I need rear mount replaced. Having buzz saw vibrations in the seat and especially pass get seat. This did not story untill I installed the front motor mount. Bike runs smooth on the front end but the rear is like riding a weed eater. My teeth was almost chattering at 55mph and that's note normal.i have heard before not to change just one but do them both. I'm gonna follow with that and change the rear mount now since the rear of the bike is where the vibes are now.