I realize this thread is a year old but i hope someone still follows it. Doing the soapy water test, my front bearing has a good leak in it but it doesn't leak oil or fuel which means it is probably sucking air in and this engine runs horribly inconsistent and the only way to keep it running is to turn the idle screw as far open as it goes. No this is not due to improper tuning as it will be fine and then all of the sudden start acting up which is what i mean by inconsistent. So what is this bypass port, where is it located, and how do i plug it up?

P.S. This was a brand new motor, nothing but problems straight from the box.