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The mounting lugs are exactly 2.5” which I think is right. The frame section that attaches to the plates is slightly less at 2.475”. Should I shim it or was that intentional?
email (option): Micah.leinonen@gmail.com
I’m pleased to confirm that straight gearbox plates and correct spacers fixed my primary sprocket alignment problem.
In the parts list for the RAF outfits, a 17T sprocket was used. But they did tend to under gear stuff back then. I think I'd try the 18T. Ron
email (option): ronpier@talk21.com