[THEFERMANATOR]

Does the plug have any signs of fuel on it? If not I would suspect the carb for a problem. If it is wet, but clean then I would suspect ignition(or water). Remove that plastic cover from the rear of the engine and then swap that coil with another and swap the wire with it as well. If the problem stays on that cylinder then it isn't the coil or wires. If you suspect fuel, then remove the airbox cover and start the engine. Bring the RPM's up to around 2500 and check for airflow through the carbs. If air is flowing through it, then spray some WD-40 in the top carb port side(the carbs feed the cylinders on the opposite sides of the engine) and see if the RPM's increase. DON'T USE STARTING FLUID OR CLEANERS FOR THIS! They will wash the oil off the cylinders and burn a bearing or cylinder REAL QUICK! WD-40 has enough lubrication to it to prevent damage but still potent enough to fire the cylinder. Also pull the drain screws as a piece of trash over the main jet can shut down all of the fuel to that cylinder.