Part 16 : Crankshaft Counterweight
Crankshaft balancing is the term commonly used to describe changes made in the “counterweights” of the crankshaft (and other components in some cases) to compensate for the weights of the moving components including the crankshaft and the components attached to it (connecting rods, pistons, etc.).
Step 1: 20. Crankshaft Counterweight - 6 Cylinder Radial Engine Inventor Tutorial