A.J.S. 31

Information relating to the Matchless G12 or AJS Model 31 650cc twin
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Re: A.J.S. 31

Postby JimFitz » Sun Mar 19, 2017 12:35 pm

dave16mct wrote:No, '59 650's didn't have those diagonal fins. They came in 1960. Funny though, the other one in Richmond has later heads with those diagonal fins! You have to be careful mixing these heads and barrells. The top spigot on the 59 is 76mm dia. The 60 on heads are 77.7mm. So the later heads will go on but you might get a lot of head gasket blowing. Also the exhaust angle is different on one side.
Dave.


Ah didn't realise that Dave. As long as the Gateshead bike has a 59 engine and barrels it should be ok then.
Kevin, looking at the way that rear carrier has been fitted (or not) I would be concerned if the owner has been inside the engine!

Jim
Too old to Rock and Roll but too young to die.

1952 G80 rigid, 1960 G12 DL / Watsonian Monza, 1954 G80S.

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Re: A.J.S. 31

Postby dave16mct » Sun Mar 19, 2017 12:42 pm

I'd go and have a look at it and take it for a test ride.
Dave.

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Re: A.J.S. 31

Postby shifter » Sun Mar 19, 2017 12:55 pm

Thanks Dave
I am thinking about it and the more I do I'm leaning to Keep my B40 I have for sale as I know it so well and forget about the 31 but I will consider things for a little while longer.
Again all advice appreciated
Thank you
Looks like the bike has been sold
?

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Re: A.J.S. 31

Postby 1957M30 » Tue Mar 21, 2017 11:01 pm

shifter wrote:Thanks Dave
I am thinking about it and the more I do I'm leaning to Keep my B40 I have for sale as I know it so well and forget about the 31 but I will consider things for a little while longer.
Again all advice appreciated
Thank you
Looks like the bike has been sold



Don't give up......AJ's are amazing machines, mine is growing on me all the time but I have kept my C12 also 🏍💨
Ride Safe & don'wear beige :lol:

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Re: A.J.S. 31

Postby shifter » Wed Mar 22, 2017 5:16 am

Hello Karol
I have got a model 20 500 twin and a c11g also my daughter has a G2 so not stuck for a ride out or tinker. I just fancied a nice 600/650 as well I will not give up on finding a nice on
Thank you
?

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