Anyone know if a 1200 GS has had a final drive failure? If they are not having problems, I would like to know the Industrial bearing number, to look it up and see the specs.
I guess sealed up rear ends are the way of the future, cars have been doing it for years, at least some of them. Many people never change it on a car. Even my Jeep you have to remove the cover to dump the fluid.
Of course the fluid should nearly go the life a drive. Generally fluid will stay clean untill a bearing failure. Seeing these low mileage bikes doing this, tells me it is certainly not a lubrication issue.