i have a a screaming eagle keihin on my 88 fxr. The bike started acting funny on me ( backfiring repeatedly and studdering at low end, sometimes in high rpms, and other times it will run fine). I have taken the carb apart and cleaned it really well, also bought a new aircleaner. Have also played with the fuel/air mixture. Maybe its not even the carb. Love to here what you guys think. thanks

 

How old/miles on the intake manifold seals?

 

Just replaced them when I cleaned the carb