The lowest price component in this Governor parts-list fiche is the Pin, Dowel(3hn).
Some items from this specific schematic: Shaft, Governor, Washer, Plate (4h7), Pin, Dowel, Spacer (5x4).
With all the components that make up the WR250Z 1997 4XK1 PORTUGAL 274XK-100E1A GOVERNOR assembly. The Ball (5x4) is the most frequently specified with four applications.