Just bought an XP 10 days ago. Running 19 tooth top gear. It has a terrible vibration that you can feel and hear. (reminds me of my old girl friends Mercury Bobcat at full throttle) Not as noticeable when your full throttle or at idle. I have an O4 rev with no vibration and have a friend with a XP with very little vibrations. I have ran 2 different belts with no change. Love the sled it rocks but vibration sucks. Any Idea out there? Thanks