Well done for doing your own maintenance Before you remove the carb, empty the fuel tank contents into a fuel can, remove tank and remove fuel tap. There is usually a tubular mesh filter attached to the fuel tap, inside the tank. Give it a clean with brake cleaner and stip , clean and rebuild the tap. Sometimes the diaphragm in the tap can be damaged and not give full fuel flow. When fuel tap rebuilt, slosh a bit of fuel around the tank and drain it into a container with a tissue and funnel to see if there are any bits in the tank. Put the fuel tap back on and refit the tank, taking care not to trap any breathers or vacuum pipes under it. Check for an extra in -line fuel filter , clean it etc, replace and then try the bike. If no change, remove carb, disconnect throttle and choke cables. Check pilot jet setting before removing, then strip all items out of carb, clean with carb or brake cleaner or in a ultrasonic bath, blow through all fuel and air ways, then carefully rebuild. Good luck, Alan.