Slide number and needle position.

[Ewen]

Hi. Does anyone know what slide number and needle position I should have on my 57 Goldflash?

[Colsbeeza]

Ewen,
This is from the BSA Spares Listings for 1954-57.
Cheers
Colin

[groily]

CARBURETTOR SETTINGS – B.S.A.
 
MODEL Y EARS CARB.
TYPE BORE M AIN JET SLIDE
CUTAWAY
NEEDLE
POSITION
NEEDLE
JET
PILOT
JET
A7 1946-53 276 15/16 140 3 3 .107
A7 1954 276 15/16 140 4 4 .107
A7 1955-62 376 15/16 210 3.5 2 .106 25
A7 ST twin carb. 1949-50 275 7/8 110 4 3 .107 
A7 ST 1951-53 276 1 160 4 3 .107
A7 ST/SS 1954 276 1 170 4 3 .107
A7 SS 1955-62 376 1 270 3.5 3 .106 30
A10 1950-53 276 1 1/16 170 4 2 .108
A10 1954 276 1 1/16 170 4 2 .107
A10 Plun 1955-57 276 1 1/16 170 4 2 .107
A10 S’arm 1955-59 376 1 1/16 240 3.5 3 .106 25
A10 1960-62 389 1 1/8 250 3.5 3 .106
A10 Super Flash 1953-54 10TT9 1 1/16 360 6 4 .109
A10 Road Rocket 1954-57 10TT9 1 1/16 340 6 4 .109
   

From a table on BSA Owners' site, sorry about poor display but should be decipherable. Pays yer money and takes yer choice Col I reckon! I always ran 3.5 on 376 and 389 carbs on mine.

[Ewen]

Thanks Colin and Groily. So, we have conflicting information. One says 4 and the other says 3.5. I guess I'll use the 4 for now.... its new so being a tighter fit it may actually make for a richer mix.

[Triton Thrasher]

Thanks Colin and Groily. So, we have conflicting information. One says 4 and the other says 3.5. I guess I'll use the 4 for now.... its new so being a tighter fit it may actually make for a richer mix.

Always start rich and weaken until correct.