the banshee will run like shit when 1st started, this problem just started. I am running the same jetting as 2 years ago, made sure the carbs were clean and synchronized. k&ns are clean and played with the air screw in carbs. She will act doggish (3-5 min) in 1-3 gears: 4-6 she will run great. Duncan said could be the rings, (weisco rings go bad they said) there is quite a bit of black residue coming out of flange & pipe. Sometimes she will foul a plug on this cylinder. Compression could be low I was told? I had the compression so low that I had to be pulled to start, I can start on 1st kick. Maybe the reeds, a season ago i replaced 1 side and I am guessing I replaced the right cylinder cause the left is giving me problems. I was running 93 with boost before and then I just went to 93 (cool head with 18cc, told I could run pump gas), do you think because I dropped the octane? No predetonation or knock, though. Tell what you guys think? thanks