Parts such as the Ignition Coil: Cap Assy.2,high T, Sub Cord,ignition, Bolt,flange,6x20, Cap Assy.4,high T are included in the Gl1500 Goldwing 1989 (k) Austria / Kph Ignition Coil parts fiche.
On this parts fiche the Bolt,flange,6x16 is the most specified component.
This Coil Comp,ign. is the most expensive of the items that make up this Ignition Coil assembly.