Thomas B.,
Terry B. is correct in his numerical specs. There is no part number given on the crankshaft casting. The K301 crank differs from the K321 and K341 in the counterweights. The K301 has a flat machined on the outer diameter of the counterweights, approximately 180 degrees from the throw, to account for the lighter piston used in this model. The K321 and K341 cranks don't have this machined flat (due to a heavier piston used) and are identical parts. I don't have a picture handy, but hopefully this description will suffice.
Terry B. is correct in his numerical specs. There is no part number given on the crankshaft casting. The K301 crank differs from the K321 and K341 in the counterweights. The K301 has a flat machined on the outer diameter of the counterweights, approximately 180 degrees from the throw, to account for the lighter piston used in this model. The K321 and K341 cranks don't have this machined flat (due to a heavier piston used) and are identical parts. I don't have a picture handy, but hopefully this description will suffice.