In this schematic the "Bolt Special 6mm." is used most often.
The most reasonably priced component used on the Xrv750 Africa Twin 1997 (v) Switzerland Cam Chain/tensioner is the Washer Seal, 6mm.
The Xrv750 Africa Twin 1997 (v) Switzerland Cam Chain/tensioner consists of twelve pieces with the Chain,cam (borg W being the most expensive.