In this schematic the "Clamp,21mm Water" is used most often.
Parts such as the Water Pipe: Clamp,21mm Water, Seal,water Pipe, Pipe Comp.,water, Hose,main Water are included in the Xl600v Transalp 1987 (h) England Water Pipe parts fiche.
The Bolt,flange,6x12 is the lowest priced item on this Water Pipe schematic.