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May 12, 2023 - 6:52PM

Re: Visual differences between an M20 and M21 crankshaft

Many thanks Ian, you have confirmed my suspicions i.e. I have an M20 crank not an M21

email (option): steve@bsa-inc.com

May 12, 2023 - 7:56PM

Re: Visual differences between an M20 and M21 crankshaft

This is what my M21 crank looks like. (Ian prepared it many years ago) Ron

email (option): ronpier@talk21.com