Parts such as the Oil Filter/oil Pump: Washer, 6x2.3, Bolt,flg.soc,6x14, O Ring,, Chain,oil Pump Dr are included in the Xl600v Transalp 1991 (m) England Oil Filter/oil Pump parts fiche.
In this schematic the "Collar,o Ring" is used most often.
This part-list fiche shows all the components that make up the Xl600v Transalp 1991 (m) England Oil Filter/oil Pump .