i have a 1979 tomos bullet it wasnt getting gas then i ajusted the bango to give it gas then it ran. then i noteced the gas switch was off? so i turned it on and it staled out so i took off the gas line to see if t was letting gas out and it was. so it runes for a little while with the gas switch off then whil its running with the gas switch off and when i turn the gas on it stalles..... is it getting to much gas? what do i have to do to fix this it sucks:(