The most reasonably priced component used on the Gsx1300r Hayabusa 2005 (k5) Usa (e03) Starting Motor is the O Ring(d:3,id:24.5).
On this parts fiche the O Ring is the most specified component.
Parts such as the Starting Motor: Frame,starter End, Nut, Washer, Shim are included in the Gsx1300r Hayabusa 2005 (k5) Usa (e03) Starting Motor parts fiche.