The Under Crankcase assembly is constructed from several parts from which the Crankcase (lower) is the most expensive.
A sample from the products for the Under Crankcase include: Pin,knock 10x14, Bolt Hex 6x100, Crankcase (lower), Bolt,hex 6x140.
The component with the lowest price in the UNDER CRANKCASE schematic is the Washer,plain, 6mm.