I sometimes think fixing clutch chatter is more Art than Science.
I just know that, when it's gone, I'm clam-happy.
It was a real issue with the Burgman 400 until I learned to give it the righteous beans on every take-off! Town folk just took me for a hot-rodder.
The LIKE200I has been in a happy place for the past 4 yrs. So I don't mess with the clutch faces or the bell. I give it the beans, a small bowl!, on take-offs.....but no one notices!
Stig