Parts such as the Fr. Brake Master Cylinder: Sw Assy,fr Stop, Clamper,fr Brk Ho, Froat,fr M/c, Oil Bolt,10x22 are included in the Gl1500c Valkyrie 1999 (x) Austria Fr. Brake Master Cylinder parts fiche.
In this schematic the "Washer,oil Bolt" is used most often.
The most reasonably priced component used on the Gl1500c Valkyrie 1999 (x) Austria Fr. Brake Master Cylinder is the Screw,flat 4x12.