OK, I'm sure this is nothing but......I found the attached fragement of metal in an area where I have been working on my 2nd Gen rear hub. I've done the following:-
Remove hub and shaft from bike.
Pulled shaft out of hub and regreased both ends, replace checking spring was in place.
Remove hub gear wheel from hub after removing circlip and dust cover for regreasing.
Now I'm sure this fragement has come from somewhere else as it is so clean, but just thought I'd check in case anyone hase see anything like it before from the rear end of one of these bikes. Its clearly broken at one end and has a tapering V groove on one side. I hope the pics are good enough for identification.
All help gratefully recieved.
Cheers