Parts such as the Cylinder Head: O-ring (d:2.4 Id:29.7), Nut, Plug, Pad are included in the Gs250t 1981 (x) United Kingdom (e02) Cylinder Head parts fiche.
This CYLINDER HEAD assembly utilises eight Guide,intake Valve(s) - the highest specified component.
The most reasonably priced component used on the Gs250t 1981 (x) United Kingdom (e02) Cylinder Head is the Ring,snap.