The Crankshaft/piston assembly is constructed from several parts from which the Crankshaft Comp. is the most expensive.
Some items from this specific schematic: Ring Set,piston (, Ring Set,piston (, Conn Rod Assy,a-b, Piston (0.25).
The Clip,riston.pin is the lowest priced item on this Crankshaft/piston schematic.