Will the o rings around the tube cause a problem with a 4 k stumble when slowly rolling on the throttle, where are the emulsion tubes located in the carb ?
The emulsion tube is the main jet bleed pipe and is inside the jet block in the middle channel. I would think if that if the needle jet o-ring was damaged or missing that fuel would seep around the needle jet into the carb bore. I think it would have less of an affect down low and get worse as rpms increase but I'm not sure. If it's bothering you go ahead and inspect it for cracks/damage.