The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Amal, Carburation, Fuel => Topic started by: Drew Back on 11.10. 2014 17:48

Title: Amal 276 Carb
Post by: Drew Back on 11.10. 2014 17:48

I just scored a 276 carb off fleabay and want to run it on my A7 long stroke .It  is a 276 BL /1A I cant find the number in my book it did not come with any jets it is a 15/16ths mouth what jets should I get or will it not work at all??

Title: Re: Amal 276 Carb
Post by: Rookie_V#60 on 11.10. 2014 20:31

Here are the Amals for the Longstroke
Rudolf

Title: Re: Amal 276 Carb
Post by: WozzA on 11.10. 2014 23:30

& here's the chart for the rest..  *smile*

Title: Re: Amal 276 Carb
Post by: raindodger on 12.10. 2014 09:33

Hello, Gents.
                  I have a question on throttle slides.  What is the significance of the cut out number.  I know it alters the mixture, but is a 3.5 cutout bigger or smaller than a 5, and by how much?
Regards.
Tim.

Title: Re: Amal 276 Carb
Post by: bsa-bill on 12.10. 2014 10:31

Hi raindoger
the number is fractions of an inch from 0 being no cutaway.
The fraction escapes me at the mo, but I remember altering one of my slides with a file - somehow a 1/16th pops into my mind but not sure of that's what I took off or is the unit. - help lads

Title: Re: Amal 276 Carb
Post by: WozzA on 12.10. 2014 11:41

The larger the cutaway the larger the number, which equals more air into engine @ idle & runs leaner. *smile*
 

Title: Re: Amal 276 Carb
Post by: muskrat on 12.10. 2014 13:20

Thats right Bill, inciments of 1/16" a 3 1/2 slide has 7/32 cutaway. You can turn a 2 into a 3 easy but the other way means needle work as well.
Cheers

Title: Re: Amal 276 Carb
Post by: trevinoz on 12.10. 2014 20:52

Drew,
               That carby is from a Royal Enfield, Model G.
You may have some trouble if you use the original air cleaner as these types are longer in the throat than standard to clear the generator.

Trev.