With a quantity of four pieces, the Bolt,flange, 6x32 is the most used part in the LOWER CRANKCASE diagram.
twenty components are shown in this Cb400nd 1984 (e) Northern Europe Lower Crankcase exploded diagram.
A sample from the products for the Lower Crankcase include: Oil Seal12.5x25x8, Bolt,flange, 6x32, O-ring,15x2.5, Bolt,hex 8x135.