In the past month my 1999 R1100RS has started a soft but very noticable clanking on cold starts which goes away in about 30 seconds. The colder the louder and longer it lasts, but it's never more than maybe 45 seconds. It seems like once the oil gets flowing all is well and stays good the rest of the day. Here in florida it never gets below 40 in the garage so it's not really cold. I tried a search but didn't find anything.
poosu