The most reasonably priced component used on the Rf900r 1996 (t) (e02 E04 E18 E22 E24 E25 E34 E37 E39) Cam Chain is the Screw.
Some items from this specific schematic: Guide,cam Chain No.2, Guide,cam Cahin No.1, Bolt, Bolt.
On this parts fiche the Screw is the most specified component.