Some items from this specific schematic: Gasket Cyln.head (nas), Packing,rub.16m/m, Gasket Cyln Head (nas), Gasket,carburetor.
The assembly is constructed from several parts from which the Gasket Kit,a (nas) is the most expensive.
Of all the components that make up this the O Ring, 30.8m/m has the lowest price.