No fuel filter. I know where the pilot and main jets are, but where's the needle jet? This problem has been very persistent. I don't really think it's fuel flow cause both cylinders pull pretty good at full throttle. This has been bugging me since I got my pipes a year or two ago. I may have just not noticed it, but that seems to be when it started. I'm tempted to go back to the stock pipes and see what happens. I'll probably break down and try the things you've listed. I do have an extra set of reeds so I can try swapping. I'm including a pic of my reeds in this post.