Of all the components used in this assembly the Gear,crank Bal Driven(nt:46) is the most expensive.
The Key is the lowest priced item on this Crank Balancer schematic.
Parts such as the Crank Balancer: Gear,crank Bal Driven(nt:46), Bout, Spring, Shaft,crank Balancer are included in the Gn250 1998 (w) (e02 E04 E22 E24 E25 E34 E39) Crank Balancer parts fiche.