This last dragon trip, I noticed that when I am revving out 2nd gear, I can hear/feel a buzz from the driveline/transmission/clutch, as well as when I release the throttle at higher RPM. The clutch grabs fine, tranny shifts fine, but that buzz is new. Any thoughts?

 

What shifter do you have? all stock or what in the driveline?

 

Shifter/linkage is stock. Clutch is an ACT flywheel with ACT clutch, installed by Billman.