I have an `04 FLHTC that coughs and spits just off idle.
I plan to change the needle jet to an `88 sporty jet and bump
the slow(pilot jet) up one size. Can some one tell me what size
slow jet comes in the carb from the factory?
It should be a 45 and you do not need to change it unless you put cams in or changed the C/R. Jus adjust the air bleed out two turns to start and when it is warmed up readjust it to where it idles the best. Hope this helps.