Some items from this specific schematic: Case,drive Chain, Chain,drive, Washer,chain Case, Bush,rabber,fork.
Of all the components used in this assembly the Fork Assy.*r-120* is the most expensive.
The most reasonably priced component used on the Z50j Monkey 1984 (e) Finland Swingarm/chain Case is the Bolt, Flange,6x12.