Parts such as the Clutch: Seal,oil(10x20x6), Washer, Bolt, Bearing(12x18x12) are included in the Vzr1800n Boulevard M109r 2007 (k7) California (e33) Clutch parts fiche.
The Clutch assembly is constructed from several parts from which the Hub,clutch Sleeve is the most expensive.
The most reasonably priced component used on the Vzr1800n Boulevard M109r 2007 (k7) California (e33) Clutch is the Washer(10.5x24x1).