My Centerforce vibrates too,lol.
The stinking flyweights seem to hang up, Whenever I hit the hiway, and once at cruising speed, I have to declutch an blip the throttle sometimes two or three times. I cruise at 65=2240
There a little vibration in my motor when standing still and revving, but not much. I haven’t actually shut the motor off at 30 mph but my sense is not much would change in what I perceive as a driveline vibration.