Sometimes when you get the drip off the oil pan's little skid plate, it can be coming from the welds that hold that little skid plate on. This one:
I fixed this once with JB weld inside the pan..
With the pan off I could pull on the skid plate, and see where the metal was cracked.. of course now that I know what I know I'd most likely get it welded for real, but at the time JB seemed to fit the skill set, and budget. a repair that's still kickin', to my knowledge. so if you take the pan off, check it out.
82 fj40, 99 uzj100, 06 gx470
97 DR650, 05 525EXC, 06 TW200, 89 TW200, 09 TTR125, 07 TTR90, 07 CRF50