With four applications this Washer(10x15x1.5) is the most specified part.
Check out any of the thirty-three Rear Master Cylinder (model P/r) components enlisted.
Parts such as the Rear Master Cylinder (model P/r): Screw, Plate,reservoir Tank, Bolt 6x12, Washer are included in the Gsxr1100w 1998 (w) Usa (e03) Rear Master Cylinder (model P/r) parts fiche.