Hi. FYI I had a 2013 wing with 45000 on Roadsmith conversion. Had a high speed vibration at over 60 mph. Turned out to be a bad universial joint. The needle bearings were all gone in one of the caps. This was on end closest to rearend, very lucky didn’t come unglued. They don’t have grease zurks on u joints, I put them on when I had the shaft repaired. Just bought new Roadsmith on new 2017 1800, no zurks either. High speed vibration-check u joints, had 1/4 play in joint. Thanks