One part of this equation that has not been addressed is Muntasel's comment in post #1 about a possible charging system problem. If it is an over-voltage situation, along with it would come higher currents than normal. The Pertronix EI module has a built in breaker that will definitely shut it down and then reset itself once it has cooled down. This was verified by the factory while I was chasing down a very similar shutdown issue in an automotive application. I'd certainly make sure that the charging system was functioning properly before going any further.
Thatch
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