318 340 steel crank

[yellow rose]

View attachment 1715128608 View attachment 1715128608 View attachment 1715128609 View attachment 1715128610 You're both right! They both weigh the same (physically) in weight only, BUT not in where the weight is locate throughout the crank in terms of the necessity of a "balanced" bob weight. #1 is 340 #2 is 318 #3 is 340 to the left with the cut-out on the crank flange for the factory access to drill for lightning the "pin" end of things, front end gets the same treatment.

I've never measured total weight. I was pointing out there is a difference in counter weight.

 

[Ben Drinkin]

In add8tion to the giggles from reading this thread, I'd like to thank you for the education! Easy to ID a forged vs cast crankshaft. I just checked my stash. I have one of each!