Thanks for the measurement Theon
I got home this afternoon and discovered what bob Ross would describe as a happy little accident. The package arrived, and upon opening it I found the company I ordered from also completed the complete head and piston assembly. I had only ordered the rod and cylinder!
Got some more designing done. This is not the final drawing as there are still some changes I want to make to the part, but here is a crank disk. There will be nine of them total
How would I go about calculating the 1.3:1 ratio that was described for the crankcase volume?
I'm still thinking about have this case with reeds instead of the carb being hooked up to the cylinder