The most reasonably priced component used on the Gl1200i Goldwing Aspencade 1984 (e) Usa California Alternator Shaft is the Dowel,pin,8x14.
The Alternator Shaft is made up of components including this Shaft Assy.,a.c.g which is the most expensive.
On this parts fiche the Sprg.b.acg.damper is the most specified component.