groaning is a good way to describe it actually. and i dont think it is actually vibrating, just that the "groan" is translating along the right side of the bike......
There's a fix for that.
On the recommendation of my tech...
Get a spare beveled steel disc...the one with the dimple...take the clutch apart and clean the steel discs with a scotchbrite wheel.
As you reinstall the pack add the extra beveled disc facing in the opposite direction of the factory installed one.
It doesn't matter where as long as it's not right next to the other one.
Groan gone for about 15K
Stock clutch pack almost 30K...I think the tangs will be gone before the friction surface wears out.