G9 / M20 Crankshaft

Information relating to the Matchless G9 or AJS Model 20 500cc twin
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Location: CAMBRIDGESHIRE UK

G9 / M20 Crankshaft

Postby CharlesDP » Sun Jul 05, 2020 7:53 am

I need some help, I have a replacement crankshaft and it has two extra tapped holes in the Crank Webb, one at each end, they are both 1.375" deep and 1/2" unf thread, and the main oilways go in and out of the holes. My question is: what are they for, I haven't seen them on any others.
Charles
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