Most of the final drive failures I've seen relate to leaking seals. Today, at interstate speed I felt a vibration and smelled something similar to the clutch spell. Lasted a second. A few miles later another strong vibration and loss of speed. Pulled over to the shoulder and while the bike would restart it would not move forward. Center stand---rear wheel won't rotate.
36,838 miles. Towed 300 miles. Awaiting dealer opening tomorrow.