Conrod

Information relating to the Matchless G5 or AJS Model 8 350cc Lightweight
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Conrod

Postby Martin.S » Mon Sep 10, 2018 10:15 pm

Hello, Could anyone give me the dimensions for the G5/M8 conrod - I don't know what I should be looking for.
Thanks

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Re: Conrod

Postby Martin.S » Thu Sep 13, 2018 6:46 am

Please Please - If anyone has a G5/M8 conrod - could they put a rule against it and tell me the distance between centres
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Re: Conrod

Postby cbranni » Thu Sep 13, 2018 8:58 am

Okay Martin, I will look in my attic this weekend.

Colin
only dead fish go with the flow

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Re: Conrod

Postby Martin.S » Thu Sep 13, 2018 11:42 am

Thanks Colin

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Re: Conrod

Postby cbranni » Fri Sep 14, 2018 7:56 pm

Have found one 250 conrod and 3 250 csr conrods so far but no 350 yet, but I am still looking.

Colin
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Re: Conrod

Postby cbranni » Sun Sep 16, 2018 2:10 pm

Hi Martin, I failed to find a 350 conrod I must have given them away but all is not lost, I measured a 250 rod which is 136.3 tween ctrs so if you add 20.5 which is the difference in the strokes the 350 conrod is 156.8 centres.
The big end bore is 51 and the small end bore is 23.8. All dims in mm.

So if you find a conrod with a 04**** number cast in and it is around 156.8 tween ctrs then bound to be a 350 rod not a 250

If it helps the overall length will be about 206.5.

Colin
only dead fish go with the flow

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Re: Conrod

Postby Martin.S » Sun Sep 16, 2018 8:11 pm

OK Thank You very much Colin - much appreciated.

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Re: Conrod

Postby Martin.S » Wed Sep 19, 2018 9:08 am

Well I have now 2 conrods in my possession - one advertised as a G2 and the other that came with loosely assembled G5 flywheels. They are the same except that one has a number 3 stamped on its side and the other has a 1 stamped on it.

IMG_20180919_092635.jpg


They both have WHT cast into them and not the part number.
They have the big end bearing still in them and that measures 2.015"diameter and the little end without the bush measures 15/16" diameter.
The rod length between centres is 5 3/4" which makes it longer than the 250cc rod by 1/2 the stroke dimension that Colin gave me.
The big end outside diameter is 3 1/8th x 7/10ths and the small end 1 1/8th dia x 1" and its overall length is 7 7/8ths.
So I'm fairly confident these are G5 components - so Keep an eye out for them at the Auto Jumbles!
Thanks Colin for your help.
Martin
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Re: Conrod

Postby cbranni » Thu Sep 20, 2018 2:05 pm

Pleasure to help Martin, I found my 350 conrod today when looking for 250 pushrods and the item you have is a 350 a conrod.

Colin
only dead fish go with the flow

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