Parts such as the F-21 Wire Harness - Ignition Coil: Rectifier,silicon, Bracket,ign Coil, Band,b1 Wire, Clip,switch Cord are included in the Ct125 1979 (z) Australia F-21 Wire Harness - Ignition Coil parts fiche.
With two applications this Nut,flange, 6mm is the most specified part.