The most expensive part in this assembly is the Head Assy,cyln.
In this schematic the "Washer Special" is used most often.
Parts such as the E-3 Cylinder Head: Spark Plug (nd), Bolt,flange,8x75, Bolt,flange,6x28, Spark Plug (ngk) are included in the Gl1200a Goldwing Aspencade 1985 (f) E-3 Cylinder Head parts fiche.