The Vzr1800 Boulevard M109r 2008 (k8) California (e33) Rear Wheel (model K8/k9) consists of twenty-nine pieces with the Wheel Set,rr(18m/cxmt8.50) being the most expensive.
In this schematic the "Bush" is used most often.
The lowest price component in this Rear Wheel (model K8/k9) parts-list fiche is the Bolt(6x16).