[rotorwrench]

9.2-volts minimum would be required to keep an 8-volt battery fully charged. The 6-volt system requires a minimum of 7.2-volts to keep it fully charged. To my way of thinking, it would be easier to properly repair and maintain the 6-volt system. Too many owners replaced the electrical cables to the battery and such with parts store specials that would barely carry 12-volts let alone 6-volts. A well maintained 6-volt system with the proper gauge wiring throughout will give little trouble even in cold weather.