Drive sprocket nut

Information relating to the Matchless G12 or AJS Model 31 650cc twin
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ChrisTheChippy
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Posts: 274
Joined: Wed Feb 07, 2018 12:02 am
Location: Essex

Drive sprocket nut

Post by ChrisTheChippy »

Hi all.
Ajs 650 csr . Magneto model.
Does anyone know the size of the nut that holds the drive sprocket on the end of the crank ?
I sorted through all my sockets this afternoon and could find nothing to fit it. Very frustrating!
I dont want to use an open ended spanner so I'll buy a socket or a decent ring spanner. Can't really measure it accurately in situ .
ChrisTheChippy
Member
Posts: 274
Joined: Wed Feb 07, 2018 12:02 am
Location: Essex

Re: Drive sprocket nut

Post by ChrisTheChippy »

Hi I just thought I would refresh this question. I have tried to find the answer myself but no joy. None of the manuals seem to give sizes just say what needs to be done. Can anyone point me in the direction of where I can find the answer ?
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les ward
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Posts: 380
Joined: Mon Jan 01, 1990 12:00 am
Location: WILTSHIRE UK

Re: Drive sprocket nut

Post by les ward »

Just been in the garage and checked the spare ones I have. The dynamo one was 13/16 Whitworth and the alternator one 5/8 Whitworth

36mm should also work for the dynamo crank
ChrisTheChippy
Member
Posts: 274
Joined: Wed Feb 07, 2018 12:02 am
Location: Essex

Re: Drive sprocket nut

Post by ChrisTheChippy »

Thanks les your a star. Saved me hours. I can't seem to find the info on that part anywhere.
Regards chris
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