You're also missing the taper pin washer. You can install the bolt temporarily with a flat washer, but try to get the right washer pretty quick so you won't cookie cut the hole in the rubber with the flat washer. That little rubber chingas costs over 50 bucks and requires swingarm removal in order to replace it. The correct washer is under two bucks.
Loctite, Loctite, Loctite.