1952 M20

Information relating to the Matchless G9 or AJS Model 20 500cc twin
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1952 M20

Postby G15 Roy » Thu May 07, 2020 5:22 pm

I am looking for photos of the inner faces of a pair of 1952 crank cases.
Roy

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Re: 1952 M20

Postby ajscomboman » Thu May 07, 2020 5:45 pm

Are you still on about those bloody cases!! :headbang: :headbang: :headbang:

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Re: 1952 M20

Postby g80csp11 » Thu May 07, 2020 5:53 pm

are you checking before you stamp 1952 on them ?

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Re: 1952 M20

Postby ajsph » Thu May 07, 2020 5:57 pm

Here are 2 photos of a 52 Crankcase
Poul
DSC01876_1.jpg
DSC01873_1.jpg
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Re: 1952 M20

Postby ajscomboman » Thu May 07, 2020 6:17 pm

There you go Mr B, I did say to you earlier that I thought they'd have to be identical by the throat of the barrel and the rocker feeds. I just couldn't see how yours could be a matching set. Now you know they're not. I'm impressed you had pictures of a pair Poul, certainly helped confirm my suspicions.

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Re: 1952 M20

Postby G15 Roy » Thu May 07, 2020 7:06 pm

ajsph wrote:Here are 2 photos of a 52 Crankcase
Poul
DSC01876_1.jpg
DSC01873_1.jpg


Many thanks just what I needed .
Roy

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Re: 1952 M20

Postby ajsph » Thu May 07, 2020 7:34 pm

There are two types of timing side crankcase in 52 , the early one with vertical type oil relief valve is identical with the 51, and the later one with horizontal oil relief valve, a one year only, the one in the photo is the early one.
Poul

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