Bought this 05 crfx 450 a few weeks ago but hadnt had tiime to ride. Was sitting over a year and carb needed cleaning, would start and die so figured jetts clogged. Carb wast too bad but it did smell like old sticky gas. Now it starts and will run okay when on the throttle but wont idle and backfires a bit. There were two vent lines I cant figure out. One comes out the back of the cylinder and T's off to one way down and the other end goes up from T but plugs nowhere. the other comes out of the top of carb on choke side and also seems to plug nowhere. Looking close at both lines they dont appear to have been plugged anywhere as they are very dirty right to the end, both have a slight elbow in the same direction and were "there" when I pulled off the gas tank. Do these just vent to atmosphere? thanks in advance for help.