Welcome to the forum.
First, check your grounds. Then pull the carb and disassemble it. Take the needle valve out and clean the carb body thoroughly. Don’t get any cleaner on the needle valve. There is an internal fuel filter. Clean it out. Assemble the carb. Check for a float with fuel in it. Check the float heights. Last, be sure that the vent tube access the top of the carb has an opening in it.
LAD Specialties customer / tony kart / rotax / kt100