Parts such as the Transmission: Collar,28x31x13, Cir Clip,28mm, B/brg Rad N/com, Gear,m-2 are included in the Vt1100c Shadow 1100 1990 (l) Usa California Transmission parts fiche.
In this schematic the "Washer,20x37x2" is used most often.
The Bolt,flange,6x16 is the cheapest item from this partsfiche.