There are two screws on the carb the top one goes 1.5 turns from all the way in unless it is bored out and the lower screw is used to adjust the idle speed a 2storke should barley Idle when warmed up...
since it is a carburated bike it will have an adjustment screw that presses on the arm of the carb where the throttle cable is connected. with the bike running turn the screw clockwise about 1/4 to...