I have a 98' Formula Z 670 with 5500 miles, sled ran great then lost all power, no spark on the right cylinder. Plug really didn't look like it overheated but I am no expert. Replaced plugs and she ran great, but not long, the same thing happened after 5 miles. When I replace with new plugs it seems to run fine again. Is this an electrical problem, stator, or is it getting to hot and burning up the plug. Any help is appreciated.