Parts such as the Starting Motor: O Ring, Bolt, Shim Set,starting Motor, Screw (6x25) are included in the Gsxr750 2001 (k1) Usa (e03) Starting Motor parts fiche.
The O Ring(d:3.1,id:24.4) is the lowest priced item on this Starting Motor schematic.
The Starting Motor assembly is constructed from several parts from which the Motor Assembly,starting is the most expensive.