On this parts fiche the Washer,9.2x19x23 is the most specified component.
A sample from the products for the Crankcase Bolt Pattern include: Bolt,flanged,6x68, Bolt,8x70, Bolt, 6x40, Bolt,flanged,7x60.
Of all the components that make up this Crankcase Bolt Pattern the Bolt, 6x40 has the lowest price.