Parts such as the Gasket Set: Gasket,cl Cover (nas), Gasket,cylinder Head (nas), Gasket,magneto Cover (nas), Gasket,oil Pan (nas) are included in the Gsx1300r Hayabusa 2006 (k6) Usa (e03) Gasket Set parts fiche.
On this parts fiche the Washer(10.6x25.5x2.3) is the most specified component.
The most reasonably priced component used on the Gsx1300r Hayabusa 2006 (k6) Usa (e03) Gasket Set is the O Ring(d:3.1,id:32.7).