I AM HAVING PROBLEMS WITH MY 720. It started running bad trying to die, someone told me it could be the coil getting hot so I decided to go ahead and switch it from a positive ground generator to a negative ground alternator since the generator wasn't charging anyways. I put a new coil on it, mounted the self excite alternator, took the voltage regulator off since my alt had a internal reg, changed it from ammeter to volt meter and hooked it up negative ground. Now it wont run, it will start but dies right after startup and volt meter does not work. Im sure its a simple wiring issue just not sure what.