I am new here and just got this mini as a gift for my kids of course it needs some work. I tore the carb down and cleaned out all the junk also drained and cleaned the gas tank. There are two lines coming out of the top of the carb one is form the tank and the other is right before the intake tube after the main part of the carb. What is this for? they have a short line with a plug in it. also any hints on getting this thing to fire?