Parts such as the Swingarm: Bearing-ball,6004ul11, Shaft-swing Arm,20x30, Nut-hex-small,8mm, Sleeve,rh,20.1x28x52. are included in the En650aff Vulcan S 2015 Europe,middle East,africa Swingarm parts fiche.
The lowest price component in this Swingarm parts-list fiche is the Nut-hex-small,8mm.
In this schematic the "Bearing-needle,bm2824" is used most often.