The most reasonably priced component used on the Cb125k3 Gasket Set A is the Gasket,insulator (mca).
The sub assemblies and components that make up this Gasket Set A include this Gasket Kit A (mca), the most expensive part.
Some items from this specific schematic: O-ring,5x2.4, Gasket,point Base (mca), Gasket,cyln.head (mca), O Ring,35.5x3.