Parts such as the Radiator Hose: Cap,radiator, Bolt, Clip, Conduction,radiator are included in the Vl800 Volusia 2001 (k1) Usa (e03) Radiator Hose parts fiche.
In this schematic the "Clamp" is used most often.
The lowest price component in this Radiator Hose parts-list fiche is the Bolt.