Of all the components used in this assembly the Crankcase Assy is the most expensive.
A sample from the products for the Crankcase include: Screw Pan Head, Crankcase Assy, O-ring (11m), Pipe, Breather 1.
This Crankcase diagram displays the required parts for the Yfm80n 1985 Moto-4 Crankcase.