The dealer came and picked up the bike and brought it back a couple of days later. Apparently when they changed the final drive fluid they removed the ABS sensor on the final drive and filled through the opening. In this case the O-ring somehow got damaged (or not re-installed ... ) when they reinstalled the sensor. They corrected the problem but did not measure or retain the remaining oil in the FD, which disturbed me as it should have been the obvious thing to do. It looked bad but they claimed the amount of oil lost was small. I let it go as I too estimated the amount of oil lost was on the order of a few ml. I considered the dealer to be good and a subsequent fluid change showed clean oil.
I did not give the bike a careful inspection, as I should have, before riding away after the service. I remember thinking it it did not feel quite right in some of the curves, but nothing dramatic happened.
So don't forget your post service inspection, short test ride and final inspection!
