G12 Air Filter

Information relating to the Matchless G12 or AJS Model 31 650cc twin
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MikeM.
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Posts: 1906
Joined: Wed Jan 01, 1992 12:00 am
Location: SURREY UK

G12 Air Filter

Post by MikeM. »

According to my Matchless spares book (page 70)
it says you shoulld use a 340 jet.

Hope this is of some help.

MikeM.
Adrian Pancaldi
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Posts: 51
Joined: Wed Jan 01, 1997 12:00 am
Location: New South Wales AUSTRALIA
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G12 Air Filter

Post by Adrian Pancaldi »

Hi John, I would try the air filter without altering the main jet and do a plug chop. The workshop manual does say 340 main with air filter (if you are running 7.5:1 compression) as Mike says. At the end of the day these figures are only a guide . Assuming the filter is a modern one ,they are generally manufactured with a much less restrictive material than the original types .
Regards
Adrian
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