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Thread help

Posted: Sun Sep 22, 2019 1:48 pm
by Davedup
Hi folks, been trying to identify the thread on the primary chaincase oil level screw as mine is shot (1960 super Meteor) and I need a helicoil.
I have a thread gauge and it says 22g which I assume is 22 teeth per inch? Making it 5/16 BSF?
Where do I go now to narrow down the thread so I can pick up a helicoil set please?

Thanks

Dave

Re: Thread help

Posted: Sun Sep 22, 2019 2:57 pm
by Davedup
Sorry, seem to have posted twice!