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Title: crankcase threads
Post by: Ralphy2 on 13 Sep, 2026, 12:50

Hi, I have looked in books I have but i cannot seem to find what the thread form is for the bolt holes that hold the inner timing cover on a '67 A65, is it 1/4" BSF or !/4" CEI, I know they are both 26tpi but the angles are different, my question is which one did BSA use?

thanks, Ralphy

Title: Re: crankcase threads
Post by: limeyrob on 13 Sep, 2026, 19:40

The BSA club fastener list has it as 1/4 CEI if its 68-0216.

BSA Owners' Club Workshop Discussions

The BSA Workshop => Twins => Topic started by: Ralphy2 on 13 Sep, 2026, 12:50