What is this washer from the rear subframe?

Oct 2019
Fremont, CA
Did you have the side fairing panels off? There is one of those on each side right at the front. The long thin securing bolts from under the headlight goes through them. They usually stay in place as you take the panel off, then randomly fall out later when you knock the bike as you work on it.
Good point. I will look as I couldn't find any screw to match these while working on the rear subframe.
Dec 2015
United Kingdom
Correct bolt, but the spacer goes between the red and the black panels. You cannot see it when the bike is assembled.