WD Motorcycle forum

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Dec 5, 2011 - 7:36PM

Amal carburateur type??

Hello everyone!

I have a Carburator from Amal and dont know if this one will fit the Bsa wm 20. Is shows 276/424 R.

Can anyone help me!

Thnx

Jeroen

email (option): jeroen.roos@hccnet.nl

Rik

Dec 5, 2011 - 8:23PM

Re: Amal carburateur type??

The mixing chamber body that you have, 276/424R is from the post-war A7 twin and has a 15/16" bore. The correct mixing chamber is the 276/014R with a 1" bore.

Bearing in mind that the A7's cylinders are individualy only half the volume of the M20's, I'd suspect that you'll find it's under-carbed...which is not to say that it wouldn't run, but...

Rookie

Dec 5, 2011 - 8:40PM

Re: Amal carburateur type??

Hoi Rik

Thnx for the information. I try to find the right one.

Jeroen

email (option): jeroen.roos@hccnet.nl

Ian Wright

Dec 5, 2011 - 9:32PM

Re: Amal carburateur type??

Hi Jeroen..You don't have to go for the specific type (number). Any 1" choke 276 with the adjustments made on the right hand side of the body and a vertical float chamber will do it and can then have the correct slide/jets etc. fitted...Ian

email (option): ian@wright52.plus.com

Rookie

Dec 6, 2011 - 8:32AM

Re: Amal carburateur type??

Thkx Ian, I go surching for the right one for my BSA.

email (option): jeroen.roos@hccnet.nl