Some items from this specific schematic: Bearing B,cranksh, Ring Set Piston O, Nut,connectiong R, Bolt,conn-rod.
The Crankshaft/piston is made up of components including this Crank Shaft Comp, which is the most expensive.
This CRANKSHAFT/PISTON assembly utilises eight Bolt,conn-rod(s) - the highest specified component.