The Bolt, Hexagon Socket Head(1uy) is the cheapest item from this partsfiche.
A sample from the products for the Crankcase include: Pin, Dowel(4jt), O-ring, Pin, Dowel(3vd), Bolt, Washer Based(4jt).
The twenty-nine Tz125 2000 4jt7 Japan 104jt-100e1 Crankcase component parts are all listed in this schematic.