My bike has 17,100 miles on it and I decided to clean, re-pack, and adjust the steering stem bearings. One thing for sure...........Yamaha does pack them adequately at assembly........UNLIKE any KLR650 I have checked! It was a straight forward job to dis-assemble because I did not have to remove the handlebars from the top triple clamp. The top nut that secures the top clamp to the stem is easily removed/accessable. I cleaned everything up while apart and went for a ride. It did not feel any better or worse, but at least I can say it has been done.