The most expensive part in this assembly is the Winker Set,r.rr.(.
Parts such as the Winker: Packing,seal, Bolt,flg Dr 8x40, Bulb 12v21w, Base Comp.,r.rr.w are included in the Xl600v Transalp 1987 (h) Spain Winker parts fiche.
In this schematic the "Bulb 12v21w" is used most often.