On this parts fiche the P1n, Dowel is the most specified component.
The Cylinder Head is made up of components including this Cylinder Head Assy which is the most expensive.
Parts such as the Cylinder Head: Band, Switch Cord, Bolt (4v8), Cylinder Head Assy, Absorber 1 are included in the Xt350 1986 55v France 2655v-351f1 Cylinder Head parts fiche.