i was having big carb problems and got a rebuilt carb from lancer. i installed it yesterday.  i have a 152.5 main jet, stock pilot jet, and 3 washers for the spacer mod.  today i noticed  that there was some gas bubbling up in both breather tubes coming off the carb.  is this normal or is something wrong?  also gas is leaking a little around the tube that connects to the carb off of the petcock(after the little filter) and i can't seem to make it stop.  any suggestions. the carb looks brand new and everything seems to be working fine.  i just dont know much about carbs.

it only seems to do this when it is running, the petcock is in the normal position (run or whatever it is, not prime or reserve). it doesnt look like it goes all the way out of the tubes, just sort of bubbles out of the front of the tubes.