The E-6 Crankcase is made up of components including this Crankcase Comp.,r. which is the most expensive.
On this parts fiche the Screw-washer,3x8 is the most specified component.
A sample from the products for the E-6 Crankcase include: Reed Valve Only, Bolt,flange,6x55, Plate,brg.set, Spg,clutch Lever.