Parts such as the Water Pump: Pump Comp,water, O-ring 32.95x2.62, Dowel,pin,8x14, Bolt,flange,6x45 are included in the Xl600v Transalp 1991 (m) France / Yb Water Pump parts fiche.
The Bolt,flange,6x25 is the cheapest item from this partsfiche.
The most expensive part in this assembly is the Pump Comp,water.