I don't know those little bikes, but if it's carbureted, those are likely bowl/carb overrun drain hoses.
When the float/needle sticks or loses seal, the fuel will continue running into the carb from the tank. Overflow hoses are to keep that gas from getting into the crankcase via the cylinder
When the float/needle sticks or loses seal, the fuel will continue running into the carb from the tank. Overflow hoses are to keep that gas from getting into the crankcase via the cylinder