Amal 276DR/1AT

[yellow B31]

Can anyone explain what the letters DR and 1AT mean?
I need a replacement carburettor body for my B31, 1 inch choke.
looking on Ebay there are similar 1 inch chock body's for sale with different numbers. Will they be suitable or does it have to be a DR/1AT?

[Jim S]

I don't know what the DR means but /1AT represents the configuration of the float bowl. I have a B33 with a  289G/1AT carburetor so it has the same float bowl as yours.
Check out the Amal web site. You may find what DR means.

Jim

[Derek996]

The carb for 1949 to 1954 was a 276DR/1AT and the carb for 1948 to 1949 models was 276AW/1BB. I've no idea what the difference was but it may be the jet block which seems to vary from model to model in the earlier bikes.

[yellow B31]

Thanks for your thoughts.  The Amal website is a mine of info. 1AT is a 7 degree float bowl and DR refers to jet size combinations. Not too clear but that apparently is the answer.