So I brought my bike to the shop for them to check the valves and I told them to make sure its tuned rite in all. I am just curious what that long flat head screw stinking out the bottom of the carb does? When we were trying to get mine running rite my dad dicked with it which I don't care that he did cause he was trying to help but what does it do? and how many turns out should it be? I also told the shop to make sure it was tuned rite and what not but I didn't know if they would dick with that screw.