Bulb information please

Information relating to the Matchless G12 or AJS Model 31 650cc twin
electrajohnt
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Bulb information please

Post by electrajohnt »

Hello
I tried this on the general forum but got no answer. On the headlight is a small light that I assume is a ignition or charging light. It is a screw in type of small bulb. Could someone tell me what the bulb model or what the wattage is please.
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Re: Bulb information please

Post by SPRIDDLER »

A photo of what you have would help. Much could have been replaced/added over the years.
I know virtually nothing about twins and you don't show the year of your bike in your post or in your Profile but I've looked at one Spares List for example and there is no ign lamp shown.
Have a look in the correct Spares List for the year of your bike (and add the year to your Profile):

http://archives.jampot.dk/book/Spares_lists/
Last edited by SPRIDDLER on Thu Mar 19, 2020 2:05 pm, edited 1 time in total.
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Rob Harknett
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Re: Bulb information please

Post by Rob Harknett »

These bulbs are like old torch or bicycle bulbs 6volt 3 or 4 watt. search "bulbs" in club spares
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spookefoote1956
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Re: Bulb information please

Post by spookefoote1956 »

Do you mean the pilot bulb?
g12headlight.jpg
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Re: Bulb information please

Post by SPRIDDLER »

Here are the bulbs shown in this 1959 Spares List:
http://archives.jampot.dk/book/Spares_l ... s_List.pdf
Bulbs 1959 (640x173).jpg
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Last edited by SPRIDDLER on Thu Mar 19, 2020 2:54 pm, edited 1 time in total.
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Mick D
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Re: Bulb information please

Post by Mick D »

Hi

It sounds like a previous owner has modified your headlight shell and wiring to include an additional indicator light - posting a photo may help in identifying the purpose but to be sure you will have to understand the circuit.

Regards Mick
electrajohnt
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Re: Bulb information please

Post by electrajohnt »

How do I insert a couple of photographs please
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Re: Bulb information please

Post by Eamonn »

electrajohnt wrote:How do I insert a couple of photographs please

Read this article:

http://www.jampot.com/forum/viewtopic.php?f=53&t=12424
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electrajohnt
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Re: Bulb information please

Post by electrajohnt »

Headlight.jpg
Headlight 2.jpg
OK Thanks.

Below should be a couple of photographs. One shows the external warning light. The other shows the inside of the light, behind the switch boot and the bulb holder hanging down on the blue wire. The holder is for a screw in type of bulb.
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clive
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Re: Bulb information please

Post by clive »

The warning light looks to be a previous owner addition. You will probably want a bulb of the correct voltage that is about 2.5 watts.
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