Hi, thought this info might be useful because i have the same carb
"For adjusting the carburetor for best performance, please follow the following setup: 1. Set the fuel/air adjusting screw all the way down. 2. Remove the metal plate that houses the slide and jet needle attached to the carburetor. 3. Set the jet needle valve C-clip to its highest setting (the setting that allows the jet needle to go in the furthest). 4. Turn the fuel/air adjusting screw 6-8th of a turn out. 5. Test the bike by riding it. 6. If the engine is bogging, fuel leaking from the carburetor, or any improper performance, stop the bike and turn out the adjusting screw another 6-8th of a turn. 7. Repeat steps 5 & 6. 8. If you screw the adjusting screw all the way out with no satisfactory result, set the C-clip on the jet needle to the second setting, set the adjusting screw all the way down and repeat steps 4-7 until you get desired results."
-found this on the bikeberry reviews of the carb