Setting the carburetor to factory settings on the baja heat mini bike?

The black Phillips head screw on the rear of the carburetor adjusts the airflow. You need to have it about 4 full turns into the hole and that's factory. To set the carburetor, just continue to screw in the air screw until the bike runs properly. In your climate, you will hear and feel the bike get smoother as the carburetor gets to the proper setting. Try it out and have a blast!!