wrong mixture

[tucks]

Hi i have a 92 fatboy and when i start it up i get alot of black smoke out the exhausts and when im going along in low gear it sputters a bit can anyone help me out please thankyou

[claydbal]

is bike all stock? air filter clean? does fuel drip from carb?

the more info you give, the easier the help.

[tucks]

its an sand s carb the fuel has eaked before but it doesnt now i turned a screw behind the carb the filter is clean