I just bought a Tremor for my son and I am having problems with gas flow. what should I do?

Check for air leaks the fuel lines the carb gasket.

make sure there is nothing blocking the outlet from the tank, i would suggest taking the line off the carb and the line off the tuned pipe, blow in the pipe and see if fuel flow easily from the carb line, if not see if something is blocking the tank somewhere. if it does, maybe something is blocking where the fuel goes into the carb. Process of elimination bro!!!