The front brakes are not "sealed" units in the sense that the back brakes are, so they dont have vent lines to vent preasure or gases away from them. The two lines from the rear of the bike, the sealed drum vent and the differential vent, are the two that plug into the frame on the right side of the yoke pipe. The other vents that plug into the frame come from the fan (the large clear line) and the front diferential. Most people just run these lines up through the headlight plastic. The vents that people are running up the snork are generaly the two carb vents. Alot of people also run them to the headlight, if they dont have a snork. If you do run them up the snorkel, make sure you stop them short of the opening far enough that you dont get any vacume on the lines (2").