The component with the lowest price in the UPPER CRANKCASE / SHIFT DRUM schematic is the Washer,plain, 6mm.
A sample from the products for the Upper Crankcase / Shift Drum include: Rubber Sealing, Screw,cross 6x20, Nut,hex 6mm, Pin,knock 10x14.
The sub assemblies and components that make up this Upper Crankcase / Shift Drum include this Crankcase (upper), the most expensive part.