I've seen too many 05 final drives with problems. More with tapered roller bearing seat problems than with crownwheel bearing failure.Newf said:Thanks for all the good info. I have been just checking the rear wheel on my 05 when it is on the center stand. I change the oil every 5000 kms (3000 miles) and have not seem any noticablty difference in oil colour or fuzz on the drain plug. I now have 85000 kms (53000 miles) on the bike and still no problems with final drive. I was thinking about changing the bearing in the final drive at around the 100000 kms mark as normal maintenance.
Odds are that you are okay.
You can ride it and never have a problem or you might end up riding it until it breaks.
If it were mine I'd open it up and inspect it, but that's easy for me to say having done enough of them to make it easy for me to rebuild 'em.
The next best thing you can do is change the lube at constant intervals using the same type of lube and look for increasing darkness to the lube at changes. The spinning tapered roller bearing will result in shed aluminum which won't accumulate on the drain plug magnet but will make the lube darker. If a spinning tapered roller bearing race is run too far the drive isn't cost effective to rebuild since it will need a new crowngear/pinion gear set and a total rebuild. I've never done that 'cause buying a used drive and rebuilding it is cheaper and easier. I'd even consider buying a new OEM final drive from BMW before I'd consider rebuilding a FD with a new crowngear/pinion gear set.