The Crankcase assembly is constructed from several parts from which the Crankcase Set is the most expensive.
Some items from this specific schematic: Bolt (6x90), Jet,air, Bolt(10x170), Gasket 8.2x14x1 (nas).
The component with the lowest price in the CRANKCASE schematic is the Gasket 8.2x14x1 (nas).