The large idle screw poistioned in the middle of the carbs is the cause of a lot of trouble for me. I will adjust the screw, the bike will run flawlessly. Then a couple of rides later the bike will stutter to a stop like it´s out of gas. I have to turn, and try all sorts of settings with the screw. Does anyone have any experience with this problem, or even better, does anyone know the solution? Thanks a bunch in advance for any help.