Carb noise @ idle

KZ_Rage wrote: Check your float height and float seat condition

calvin17d wrote: I was actually tuning them by starting them all the way in and listening to the engine as I backed the screw out. this was the only carb that didn't stumble when the screw was seated. I backed it out over 2 turns but never heard any difference and with the slurping noise I decided the spec'd setting would be a safe spot for a test run. The bike ran quite well after tuning but that spark plug was noticeably more rich and nearly fouled while all others were ideal in color.

Patton wrote: If turning the pilot air adjustment screw fails to influence rpm, it often indicates an imperfect pilot circuit for whatever reason, but oftentimes due to an obstructed air passage and/or an obstructed fuel passage and/or an obstructed air/fuel mixture passage, or perhaps due to a damaged pilot screw (perhaps the pointed tip is damaged or its seat - orifice - is damaged).
The tip seemed in okay condition. I plugged a small hose into the pilot intake and with the screw seated i could not blow air passed.

Where carbs are in fact clean and in otherwise perfect condition, an excessively rich pilot circuit may result from obstruction or partial obstruction of the port where air first enters the pilot circuit, this being a smaller hole located alongside the main carb bore.

This may have been plugged, I ran some air and cleaner through the circuit which is now passing air quite freely.

Reportedly, some pods may block or partially block the pilot air entrance port, which might be a possibility with the bike at hand. Could test run without the pod on the carb to the affected cylinder to see whether it makes any difference.

This may be something to explore. I am running K&N Pods.
Good Fortune!