I discovered an oil leak that originated from this bolt, it was so loose I could turn it with my fingers. Would this have been removed for the 12k service on an r1250gs?
Yea, I should also marker everything with a line so its easy to check, I've gotten kind of lazy with my GS lol.To my knowledge, no.
This is why it's a very sound practice to open a beer, turn on your favorite music and just spend a half hour touching a wrench to every single nut/bolt/screw that you can see on the bike.
You'll be surprised at what you find . . . . . . before it falls off on the trail.
A valve check is required at 12k. That plug is removed to install the TDC locating tool. I would think the dealer would utilize this tool. So, yes, I think it was removed at the 12k service and forgotten to be retorqued.