How do you tune a pw80 carb?

To tune a PW80 carburetor, start by ensuring the bike is at operating temperature. Adjust the idle screw to achieve a smooth idle, then fine-tune the air-fuel mixture screw for optimal performance; typically, turning it clockwise leans the mixture and counterclockwise enriches it. Test the throttle response and make additional small adjustments as needed for best performance, ensuring the bike accelerates without hesitation. Finally, check for any signs of rich or lean running, and make further adjustments accordingly.