1937 AJS 250 37/22

Information relating to Matchless and AJS Models built prior to 1939
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1937 AJS 250 37/22

Postby NORMAN NIPPY » Thu Mar 26, 2020 2:47 pm

Some months ago I removed the battery, as the leads are not marked . Is it pos or neg earth
Thanks

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Re: 1937 AJS 250 37/22

Postby Rob Harknett » Thu Mar 26, 2020 3:36 pm

I thought you had an instruction book. http://archives.jampot.dk/book/Workshop ... dition.pdf
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Re: 1937 AJS 250 37/22

Postby clive » Thu Mar 26, 2020 6:04 pm

My method, as you can never tell what a previous owner has done, would be to connect the battery any terminal earthed. Turn on the headlight. If the ammeter shows discharge all is good. If it shows charge then its the wrong earth. Reverse them and run the engine if the dynamo is charging all is good. If not you will have to flash over the field. You have a 50:50 chance of being right and plenty of time to sort it out if wrong!
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if it ain't broke don't fix

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Re: 1937 AJS 250 37/22

Postby NORMAN NIPPY » Thu Mar 26, 2020 6:59 pm

Thanks for your reply yes I have a manual for bike , but when I see it is a neg earth I wanted to check as my G9 is a
Pos earth
Thank you

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