ok so at second look i am not a 250 main im a 290 main and i dropped the pilot to 25 cuz thats all i had, it sounds a lot better than it used to now i can also use the idle screw to adjust the idle and it finally actually adjusts. but i haven't touched the screws on the sides of the carbs yet. i am still running with the air box lid on, should i remove the lid??? and which way do i turn the screw on the carb to lean it out ???