Carter BB; BBR1; RBS; AS; Needle & Seat

Single barrel downdraft carburetor needle & seat assembly.
The RBS can have several different needle & seats.

Difference between this N & S on left and CNS3516 [larger unit on right]

This N & S has 0.086” orifice and 1/8" F.P.T. pipe fitting

Carburettors this N & S suits:

4631S, 4631SA, 4633S, 4633SA, 4634S, 4634SA, 4666S, 4666SA, 4998S, 4998SA, 6041S, 6041SA,
R-3418-1A, R-3418-1AAS, R-3418A, R-4054A, R-4054AAS, R-4223AAS, R-4295A, R-4295AAS,
R-4296AAS, R-4493-1A, R-4493-1AAS, R-4493A, R-4493AAS, R-4558-1A, R-4558A, R-4559, R-4559A,
R-4559AAS, R-4776-1AAA, R-4776-2AAA, R-4776AAA, R-4777-1AAA, R-4777-2AAA, R-4777AAA,
R-4778-1AAA, R-4778-2AAA, R-4778AAA, R-4779-1AAA, R-4779-2AAA, R-4779AAA, R-4780-1AAA,
R-4780-2AAA, R-4780AAA, R-4781-1AAA, R-4781-2AAA, R-4781AAA, R-4788-1AAA, R-8572A 588S,
588SA, 615S, 615SA, 617S, 617SA, 621S, 621SA, 656S, 656SA, 686S, 686SA, 692S, 692SA, 700S,
700SA, 980S, 980SA, 2805S, 2808SA, E7J1, E7J2, E7J3, E7J4