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Amal concentric series 2000 carb #791861 12/02/19 4:51 pm
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Mike Fielding Offline OP
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I have an AMAL Concentric series 2000 carb How do I identify which one I have. The only marking on the carb are Made in Spain. No other numbers etc are on the body.

Last edited by Mike Fielding; 12/02/19 6:54 pm. Reason: Wrong type of carb
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Re: Amal concentric series 2000 carb [Re: Mike Fielding] #791943 12/03/19 2:41 pm
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Nick H Online Content
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Measure the bore. 36, 38 or 40 mm.


1966 BSA Lightning
(2) 1967 Triumph "Choppa"s
1974 Indian ME125
Re: Amal concentric series 2000 carb [Re: Nick H] #791948 12/03/19 3:43 pm
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Mike Fielding Offline OP
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Hi Nick, without taking it off I am assuming it would be a 38mm bore to replace the GP carb

Re: Amal concentric series 2000 carb [Re: Mike Fielding] #791959 12/03/19 6:10 pm
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kommando Online Content
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Assume nothing, DPO's (dumb previous owners) have no fear fitting different carbs on left and right sides of twins, fitting the wrong one to a single is even easier.

Re: Amal concentric series 2000 carb [Re: Mike Fielding] #791960 12/03/19 6:16 pm
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kevin roberts Offline
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That's Me!

i fit anything to anything to see whether it works.

having said that, if it doesn't work i'll mess with it until it does, or i'll take it back off.


every day you do not take a chance is a day of your life that you will never get back.
Re: Amal concentric series 2000 carb [Re: Mike Fielding] #791961 12/03/19 6:19 pm
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Mike Fielding Offline OP
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I don't think that would be the case in this instance. The previous owner was very fastidious on what he did, so lets assume it is a right hand 38mm carb.

Re: Amal concentric series 2000 carb [Re: Mike Fielding] #792010 12/04/19 4:22 am
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Kerry W Offline
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Peek down the intake with the throttle open. describe what you see of the top of the brass outlet where the needle slides in and out.

Does the carb have an scree adjuster for the slide, for an idle throttle opening? (There are versions- smoothbores -that don't).

I go with the 'assume nothing' view - e.g. 36mm Mikunis will give the same power as a 38 on a GS, though the mid-range is allegedly better.

Last edited by Kerry W; 12/04/19 4:43 am.

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