Parts such as the E-18 Piston: Piston (osz 0.75), Conn-rod Assy., Brg.a,2&4 Conn., Bolt Conn Rod are included in the Gl1200i Goldwing Interstate 1984 (e) E-18 Piston parts fiche.
The most reasonably priced component used on the Gl1200i Goldwing Interstate 1984 (e) E-18 Piston is the Pin,piston.
In this schematic the "Nut Conrod" is used most often.