I am working on a banshee for someone else and having a problem with a stock carb. The right cylinder acts like it is running lean and cuts out sometimes, pull choke and it gets a little better but then left side loads up.
I have done leak down, compression tests, cleaned/dissasembled the carbs and blown compressed air everywhere, float height etc. all checks out. Basically traced problem down to the one carb. Bowls are on correct carbs, and choke tube is hooked up. Only issue I can find is the right carb is significanty different in idle screw adjustment to make the carbs sync correctly with a sync tool. I have an old spare set of carbs that I swapped in, everything jetted the same and it runs like it should. Only thing changed is just the carb body itself.
Any ideas on what else to check? Otherwise I am going to reccomend just getting new carbs.