So I put an Athena 392 big bore kit on my banshee last year. My other mods were 35.5mm flat mikuni slide carbs, k&t intake manifold, vforce 4 reeds, cpi in frame pipes, case port, +5 timing on stator, and also some transmission mods that aren't relevant to my issue. With the domes Athena sent me, I was only making 110psi in both cylinders but this was due to my elevation (4,500 feet). Knowing what I do know about motors I bought 18cc big bore domes to raise my compression. Before starting the motor I checked the compression with the new domes and it raised it to 140 on the nut in both cylinders which is exactly where I want it. The issue I'm having is, it ran great before, and now it has a bog on the top end of the throttle. Knowing that it needed more fuel because I raised the compression. I changed the mains from what they were, 290's to 300's. It still ha dyne same bog. Then I raised my needles 2 steps and the bog got worse and now when you are in first gear and pin it from about half throttle one of the cylinders seems to cut out. I am absolutely baffled by the problem, any ideas? Any help would be greatly appreciated!!