With a quantity of seven pieces, the Washer,plain, 6mm is the most used part in the LOWER CRANKCASE diagram.
A sample from the products for the Lower Crankcase include: Crankcase (lower), Bolt,hex 8x97, Washer,plain, 6mm, Bolt,hex 8x115.
The Lower Crankcase is made up of components including this Crankcase (lower) which is the most expensive.