ajs model 30, firing on one cylinder

Information relating to the Matchless G11 or AJS Model 30 600cc twin
hodgson
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Joined: Mon Jan 01, 1990 12:00 am
Location: BERKSHIRE UK

ajs model 30, firing on one cylinder

Post by hodgson »

runs and sparks well on near side, but misses with intermitten spark on off side,
wilko
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Location: victoria AUSTRALIA

ajs model 30, firing on one cylinder

Post by wilko »

Do you have the leads running inside the manifold? Maybe one of them is tracking to earth intermittently?Check it out in the dark while it's running.
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Samuel
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Location: Somerset UK

ajs model 30, firing on one cylinder

Post by Samuel »

Inlet port obstruction on one side

It only needs a small ridge or part of a gasket sticking out into the airflow to ruin the fuel atomisation for that cylinder ...
Sam
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1608
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ajs model 30, firing on one cylinder

Post by 1608 »

Yes Sam, there's an interesting piece on Inlet Port Obstruction somewhere in Tech Articles.
wilko
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ajs model 30, firing on one cylinder

Post by wilko »

The last inlet obstruction i witnessed was on a Matchy twin with rag left inside it! Took a while to diagnose that one until we noticed some scraps of material down the plug hole! He forgot to remove it when he bolted the manifold on!
OLD SHEP
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Location: DEVON UK

ajs model 30, firing on one cylinder

Post by OLD SHEP »

I used to have this problem on my Model 30. I found the trick is to adjust the advance/retard lever and then the other cylinder chimed in. After that, I just left the lever in the position it liked & all was well.Edited by - OLD SHEP on 24 Oct 2011 3:27:23 PM
wilko
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ajs model 30, firing on one cylinder

Post by wilko »

Was it resolved Chris?
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