I have recently replaced leaking seals on my 2004 Dyna low rider. I, at the same time changed the lube to HD Syn3 in all three holes. Since reassembly, I have noticed a vibration in all gears at around 2000 rpm. It runs smooth when cold, but begins to vibrate after about 30 min of riding. When I first noticed it, I suspected that I had missed something during reassembly, so I took it back down and did it again. Still there. I had also remapped the Commander III EFI to match the bikes exaust and air. The original map was for stock and I am running Python full exhaust and Screaming Eagle air. Temporarily put the old map back in. Still there. Looking for ideas.