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Having trouble with one side loosing spark. Its always the same side. If you put in a brand new plug you will get 2-3 hours of riding before the plug being dead. We've tried the dead plug in other sleds and its really "dead" Would the coil be overloading that side or anything like that. The minute you put in a different plug it runs fine for another 2-3 hours. I've only heard of coils failing. Anyone ever heard or experienced this type of thing