spark plugs black

Information relating to the Matchless G12 or AJS Model 31 650cc twin
legg
Posts: 219
Joined: Tue Oct 30, 2007 4:15 pm
Location: NSW AUSTRALIA

spark plugs black

Post by legg »

Very useful. Thanks, Trevor.
rockinron1941
Posts: 76
Joined: Tue Jan 04, 2011 4:56 pm
Location: LANCS UK

spark plugs black

Post by rockinron1941 »

THANKS Trefor very imformative.Ron
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greasemonkey62
Posts: 562
Joined: Wed Jun 16, 2010 12:37 pm
Location: SOUTH YORKSHIRE UK

spark plugs black

Post by greasemonkey62 »

I have just solved a very poor tickover and sooty plugs, it turned out the main jet had become loose !! I have never ever had this before, but thats the fascination of these old bikes, keeps you on your toes.
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Rob Harknett
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Joined: Mon Jan 01, 1990 12:00 am
Location: ESSEX UK

spark plugs black

Post by Rob Harknett »

I once had the main jet on my 36 AJS fall out.
I was wondering why the old thing was running so badly, But she soon got going normal again having screwed her jet back in again. I did in fact finish the run I was on, but
it only ran like a 4 stroke at certain revs, with the main jet sitting in the bottom of the carb.
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bigwol
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Joined: Fri Mar 04, 2011 10:45 pm
Location: ESSEX UK

spark plugs black

Post by bigwol »

Hmmm, i wonder if thats why i cant get my 16MS to tick over consistently, and why she's running rich? Main jet falling out? Who'd a thought it?
It's all just riding motorbikes
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