The most expensive part in this assembly is the Crankshaft Assembly.
Some items from this specific schematic: Bearing(18x23x22), O Ring(d:2.4,id:21.8), Washer(24x29x1.5), Crankshaft,left.
The lowest price component in this Crankshaft (model H) parts-list fiche is the Circlip,piston Pin.
