I have a vibration problem that I have been trying to find for the last couple of weeks.
It is mostly felt in the left footpeg, really noticed between 35 and 55 MPH. Its a even, constant, THUMP THUMP THUMP, kinda reminds me of old bias ply tires when they are cold. You only notice it when running along under very little load, not while accelerating or de-accelerating, If you pull in the clutch and coast, you also don't feel it.
Since it is felt on the left side, first thing I thought of was a tight link in the chain, so it was gone over and cleaned and lubed, checking closely for a frozen link somewhere. None was found, and the chain is well within the green for adjustment. I have run the chain on the loose side, as well as a little over tight, the vibration problem seems the same. Front and rear sprockets also look fine.
I also thought that maybe the chain was hitting the center stand, as I have D&D slipons, and thought it might be riding higher than stock. This still hasn't fixed the problem.
I'm asking for help, as I have run out of ideas, short of spending $200 + for new chain and sprockets that I don't think is really needed.
Thanks in advance...