New Carb

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japes1275
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New Carb

Postby japes1275 » Fri Jun 08, 2018 10:20 pm

I decided after years of putting up with an old and worn Mk1 Concentric on my B40 to replace it with a new Mk1 Premier Concentric (alloy) and what a difference! Bike starts and runs so much better with a nice smooth throttle, best thing I ever did, just wish I'd done it years ago instead of spending money on a rebuild kit.

Just thought I'd post to perhaps convince anyone with an old, worn carb to think about getting a new one!

twinshocker
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Re: New Carb

Postby twinshocker » Sat Jun 09, 2018 1:09 pm

:thumb

Make sure that you have the chromed brass slider not the crappy zinc part which will get perilous after a while

twinshocker
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Re: New Carb

Postby twinshocker » Sat Jun 09, 2018 1:12 pm

Oh sorry, i was talking about the MK II Amal, may be the problem exists with the MK I as well ?

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kommando
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Re: New Carb

Postby kommando » Sat Jun 09, 2018 5:57 pm

The Premier comes with an anodised slide, this is to cure the galling issue, plus the aluminium premier is cast aluminum alloy, not zinc based monkey metal. Lighter and less wear.

mlb50
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Re: New Carb

Postby mlb50 » Sun Jun 10, 2018 4:08 am

The Amal Premier today is the ideal carby for just about every classic British bike. I'm amazed that some people go to the cost and effort of rebuilding a motor and then fitting a 40 year old used carby. For the money,a Premier is good value, fits correctly, easy to set up and tune and is correct for the appearance of the bike.
B50 @ 10:1 - what's a leg between friends?

japes1275
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Re: New Carb

Postby japes1275 » Mon Jun 11, 2018 10:00 pm

Yes the slide is hard anodised. The Premier also has a revised pilot jet which can be removed without dropping the float chamber - although on my B40 the battery carrier is in the way!

I echo the comment about rebuilding the engine and fitting an old carb, exactly what I did. It ran ok but wasn't exactly easy to start and was a bit erratic. Then the pilot jet kept blocking up and so I decided the Premier was the way to go and I paid the extra £15 for the alloy one. The other weekend I went on a 100 mile green lane run round the Dales and it started first kick every time, hot or cold all day.

Well worth £150!


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