The Key 4mm is the cheapest item from this partsfiche.
The sub assemblies and components that make up this Crank Balancer include this Gear,crank Bal Driven(nt:46), the most expensive part.
Parts such as the Crank Balancer: Spring, Washer, Key 4mm, Gear,crank Bal Driven(nt:46) are included in the Dr250s 1983 (d) Crank Balancer parts fiche.