I noticed a bit of oil after sitting awhile and tried the bolt. It was loose. So I tried to tighten it, lightly! and it twisted off. Most all were loose, not enough to the eye, but using a wrench they were very easy to turn in. I used a torque wrench at 12 Nm and snapped another one. The rest were able to get to 12 Nm but I was very wary on some of them.
The one good one I took out just to see what I need to get to replace them. I see no sign of loctite.
As you stated, I suppose the engine vibration backed them off a bit, but not enough to spot just by looking.
I bought me a couple of M6-25 bolts at the local Ace Hardware and will try one of those *when* I get the stubs out. The OEM's are M6-28, but the only size they had longer than the 25 was a 30.
Any way thanks for all of the input! I'll try the simple stuff first and take a good look to see if I can tell if the stubs will be longer than the engine block if the sump is removed.
I have all the bolts and a gasket tucked in my shopping cart at 2WheelPros in case I have to go that far. One bolt is different than the other 20, I see from the schematics.
I DO NOT want to remove the sump for some reason. Maybe just a bit much beyond my comfort level.
I'm not in too big a hurry. Gonna be out of town visiting my boy in NM this weekend. Might try the mini screwdriver, pencil eraser stuff tomorrow, though.
Then
@Joesmoe's trick with a reverse drill bit. Might try a wood dowel in there first to see if it will grab enough to back it out. If that won't then I'll drill through the dowel to make a center guide for the drill.
Knock on wood.