Some items from this specific schematic: Bolt,socket,8x65, Stay L Leather S/, Leather S.b.stays, Socket Bolt,6x12.
The most reasonably priced component used on the Gl1500c Valkyrie 2001 (1) Germany / Kph Leather S.b.stays is the Socket Bolt,6x12.
On this parts fiche the Socket Bolt,6x12 is the most specified component.