Moped Army

Yeah,I forgot about that possibility.The easy way to tell if it's one of those,is if it has more than one place on it to attach a line to.The petcock should attach to the gas tank,and there should be a fuel line going from the petcock to the carb.If there is another fitting on the petcock,it will be for a vacuum line,which should attach to the intake manifold somewhere.However,if it's a 50cc scooter,it may not have a vacuum petcock.50cc doesn't produce much vacuum.But it's worth checking.Jerry.