If you have a spare week or two, reading the "chain link" (sorry) on this site will persuade you that
Turps then oil
Install an automatic oiler
is the answer
More to the point, do you have Givi bars? They definitely cause vibration, but usually at higher revs.
My skidplate also causes vibration.
Lastly, an old chain caused that very same 'clunk' in my last bike.
'15 Red DL650
Subaru Outback X/T
Brody Mtn Bike
Give 'em a twist, a flick of the wrist
That's what the showman said...
Last edited by Traveler; 05-19-2017 at 02:31 PM.