ok, first off...im a newb with MB`s and some people will say im as mechanically inclined as a fart. but i did manage to assemble the 2011 skyhawk GT5 kit and install it on my 4 year old walmart schwinn skyliner in less than 4 hours! but i am having trouble with one little thing.... Q- there are 3 small tubes coming out of the motor. one i know is the fuel overflow but what are the other two tubes for? they seem to stick straight up.