my buddy just got the Athena big bore kit 392cc, alien 916 pipes, k@n w/ outerwears, Keihn PWK 28mm carbs running 100 octane, and we cannot figure out what size jets to use, he has 160 mains and 52 pilots and 3rd clip position in now. it barely idles and when you hit the throttle it kinda dies out. any suggestions would help out great thanks..