2006 K1200R. Lubing the rear final drive splines, I noticed I am missing the little shock washer (damping disc) that goes (when assembled) between the female splines at the end of the driveshaft and male splines of the gear journal. I see it in the diagrams, but it's not there on my bike. This is part # 02 26 11 7672657. "2" in this diagram. Questions for the group: (1) is anyone else missing this little washer? (2) For someone who has one, what material is it made from? Is it polyurethane? (3) What happens if it's missing for over 7,000 miles?