On this parts fiche the Bolt(6x20.5) is the most specified component.
Parts such as the Air Cleaner (model K1/k2/k3/k4): Cap,air Cleaner, Clamp, Tube,breather, Clip are included in the Vl800z Volusia 2002 (k2) Usa (e03) Air Cleaner (model K1/k2/k3/k4) parts fiche.
The component with the lowest price in the AIR CLEANER (MODEL K1/K2/K3/K4) schematic is the Cushion.