On this parts fiche the Bolt(8x21) is the most specified component.
The most expensive part in this assembly is the Wheel,rr(13m/cxmt4.00).
Parts such as the Rear Wheel (an400 L1 E3): Spacer,rr Axle Outer, Nut, O Ring(d:2,id:24.5), Weight,wheel Balance 10g are included in the An400a Burgman 2011 (l1) Usa (e03) Rear Wheel (an400 L1 E3) parts fiche.