After a few thousand miles with no more leaking, it re-appeared during yesterday's ride. Identical to what was happening on last summer's road trip. I had the drive recall done early this spring and put a couple of thousand miles on post work, no leaks whatsoever.
I haven't done much riding this summer for various reasons, finally got out yesterday for about a 500 miler. Spent the first hundred miles or so working at a pretty good clip, (90 or so with occasional slow downs for known trooper hideouts). Got out into the big empty of central Oregon and really let the VFR have its head, lots of runs to a dollar fifteen and a nice burst over a buck 30, temps were in the mid 90s. It was after this rapid transit session that I noticed the oil on the rim, similar scenario to last time: higher speeds on a hot day.
Here's some pics, best guess is that the leak originates at the drain plug (you can see the copper washer on it in the pics). I'll replace the drive oil and washer soon, not too worried about the issue as the quantity of oil leaked is small despite the mess, oil never makes it way onto the tire at all, nor the rear brake.
Still no one elese experiencing this?
Any thoughts as to why the drops on the rim spread laterally instead of the direction of rotation, seems odd to me.