I know we've all heard it before, but I'll say it from my own experience. 263 miles on an 05WR450 and the swingarm bearing looked pretty dry. Was able to save them all but the relay arm bearings were the worst. So dry that they were showing signs of heat on the bushing. Needles didn't even have enough grease to keep them in the cage when I pulled the bushing out. I don't know why the factory refuses to grease them sufficiently, but take it for what it's worth. GREASE YOU LINKAGE.