Parts such as the Cam Chain/tensioner: Chain,cam, Bolt Flg.7x13, Bolt,flange 6x14, Washer Seal, 6mm are included in the Xl600v Transalp 1987 (h) Switzerland Cam Chain/tensioner parts fiche.
The Washer Seal, 6mm is the cheapest item from this partsfiche.
The Honda CAM CHAIN/TENSIONER has fourteen products enlisted in the schematic.