I have a problem with my America 800 it's running lean on the right cylinder and when I adjust the mixture screw it makes no difference. The mixture was checked using an AFR meter. The rubbers between the carbs and manifolds have been replaced today still running lean on right cylinder.
The bike sat for 4 years and when I brought it out to get it going again I found the carburetors full of gunk and it would not run so the carburetors were pulled down and cleaned, and while they were apart I put bigger main jets in and blocked the air recycle system.
Someone has told me that the coil is faulty on the side that is running lean but that doesn't make sense. I have check there are no air leaks.
Could it be the idle mixture circuit ?