42 pilot 150 main for stock Keihin butterfly carb.
The 1983 FXSB came stock with a Keihin B28E 38mm butterfly-type carburetor. First use of the Keihin CV carb was in '89 for Sportsters and '90 for all big-twins.
Harley stopped using carburetors on all their bikes after 2006; now they're all fuel injected. But the last type of carb used was the Keihin CV (constant velocity) which was based on the British Amal slide carb from the Forties. Before that they used a Keihin butterfly carb, and before that a Bendix-Zenith, and before that a Tillotson, and before that a Linkert, and before that a Schebler and the very first Harley carbs were made by the founders themselves, with the help of Ole Evinrude of outboard motor fame.
Depends on the model.
The 1983 FXSB came stock with a Keihin B28E 38mm carb, which is a butterfly-type, that is to say a non-CV (constant velocity) type. CV Keihins didn't appear until 1988.
I know of a Tillotson brand carb that was on a stock sportster.
22mm keihin carb
why can I not stop the leaking of gas from the carburater on a 1994 harley
Full Length Harley RoadKing Injected ( fuel injection instead of carb)
Check the plug gap / check timing , check jets in carb
The s&s super e is by far the best.
22mm is the float height for this carb
36mm Keihin