1929 M5 - 350 Side Valve Spark Plug?

Information relating to Matchless and AJS Models built prior to 1939
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Angelo
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Location: Carmarthenshire UK

1929 M5 - 350 Side Valve Spark Plug?

Post by Angelo »

Hi - does anyone know what the correct and also available spark plug? I found a reference to a KLG431 but this seems unobtainable and cannot find a chart showing an equivalent.
Thanks
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Andy.S
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Location: Northamptonshire UK

Re: 1929 M5 - 350 Side Valve Spark Plug?

Post by Andy.S »

Hi Angelo
My friend runs a vintage restoration business he informs me the best place to help you would be The Green Spark Plug Company see link below


https://www.gsparkplug.com/
Angelo
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Posts: 63
Joined: Tue May 14, 2019 11:45 am
Location: Carmarthenshire UK

Re: 1929 M5 - 350 Side Valve Spark Plug?

Post by Angelo »

I looked through the Green Spark listings and it's not there and there is no chart showing it. I will ring them - I was hoping someone had experience with a plug that suits - thanks
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Duncan
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Location: HAMPSHIRE UK

Re: 1929 M5 - 350 Side Valve Spark Plug?

Post by Duncan »

Hi Angelo

I've had a quick internet search and is 431 a typo, should it be 341? see last page of http://archives.jampot.dk/book/Owners_m ... Manual.pdf

In the absence of any firm information would this table give an alternative starting point for your search, post 1929 unfortunately https://www.barnstormers.co.nz/barnstor ... Guide2.pdf
Angelo
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Posts: 63
Joined: Tue May 14, 2019 11:45 am
Location: Carmarthenshire UK

Re: 1929 M5 - 350 Side Valve Spark Plug?

Post by Angelo »

Duncan wrote: Wed Jul 06, 2022 1:26 pm Hi Angelo

I've had a quick internet search and is 431 a typo, should it be 341? see last page of http://archives.jampot.dk/book/Owners_m ... Manual.pdf

In the absence of any firm information would this table give an alternative starting point for your search, post 1929 unfortunately https://www.barnstormers.co.nz/barnstor ... Guide2.pdf
Duncan - yes looks like made a typo - the plug doesn't appear in the listing and the I've fitted us a Champion D14 - it seems to work ok but wanted to check.
Thanks
Angelo
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