Yesterday my wife and jumped on I-75 to run from Gainesville to Ocala. The traffic was rolling from 80 to 90 mph so we decided to see how our new 2014 RT would handle the super slab at those speeds. I kicked it up to around 82-84 mph to see about the buffeting everyone talks about,I put the windshield all the way up to keep the wind off my wife and it rode great! We passed several semi trucks with no swerving, the only issue we had was a vibration at that speed that would come and go in intensity. I assume from talking to other Spyder riders that it was the drive belt that I felt. I could drive out of it by going a few miles per hour faster,or by slowing down a few miles per hour. Would the belt tensioner that I see advertised cure that or is that a common trait of the Spyder? We do not normally ride that fast,but it was more annoying than anything.My Victory was belt drive and we have ridden a full tank of gas out at 80+ with no vibration. Any ideas?