I know I've said it a hundred time before, but this time I think I REALLY know what the problem is. About 5 yrs ago I had some guy (putz) take a look at the carb (before I really understood them) & I think he switched the needle for one that's too short! I've got too much overlap b/w the main & the needle! Other than that one throttle position, it's perfect. Oh yeah, & the cops pulled me over on it this weekend, but that's another story.