Parts such as the Valve: Lifter, Valve, Pad, Adjusting, Pad, Adjusting, Pad, Adjusting are included in the Xt350'88 1988 55v0 Europe 1855v-300e1 Valve parts fiche.
The Valve is made up of components including this Valve, Exhaust which is the most expensive.
On this parts fiche the Cotter, Valve is the most specified component.