What are the risks if the voltage regulator is not used on a RC. I am rewiring my RC from scratch and was wondering what systems on the RC really need a voltage regulator. I am using a MSD ignition and the RC will have a push botton start. I am also using 2 batteries with an isolator. I should be able to at least start the RC by weeks end but was wondering what electrical systems on it really need a voltage regulator.