ok i just got this sled and already im having problems with it. when i rode it at the guys house it rode fine and started with 3 pulls when it was cold. i got it to my house and it would start then shut off. i checked the plugs and they were covered with fuel so i cleaned them off and it started again for a little then shut off again. i concluded that the pulgs were fouled and i got new ones. it was really damp and humid when i tried to start it so i thought that was the problem. i put new plugs in it and now it wont even fire. i put it in the garage hoping it would warm up a little and start but it still wouldnt start. i pulled the plug to check for spark on the head bolt but no spark. is it the coil?? what else could it be??