I was doing some post trip maintenance this afternoon and had the front cover off. While rooting around in front and below the oil tank, I discovered that the bracket to which the ignition coil is mounted, had cracked it's weld and come loose from the 2 inch round frame tube that runs from side to side in that area. It appears after taking a good look that the bracket was held against the tube and a bead of weld was run across the exposed surfaces. There was no evidence of penetration into the joint area where the flat edge of the bracket contacted the tube.
We were on the road for 3 weeks (2,400 miles) so no telling how long it had been broken. The good side of this is that it is not a show stopper as the whole business just kind of lays on top of the wiring below. Check yours next time the front cover is off.