Super H 6 to 12 volt

This may be a stupid question but if I am changing a super h to 12 volt and changing everything like the lights, coil and the light switch to 12 volt do I need to put a resistor on the system.
 
YES NO. If you want to use a coil that needs no resistor (No External Resistor Required) then you will not need a resistor. If you use a coil (the original 6v, or a 12v that requires a resistor then yes. There is no resistor in a coil designed to be used without one, they just have more and thinner wire. The advantage of a resistor is that you can put a bypass wire from the starter switch (starter side) to a diode, then to the distributor side of the coil. This will allow the coil to operate on starting voltage when cranking. Usually 11 or so volts. This boosts the spark at a time most needed. The Diode stops voltage from going from the ignition to the starter (which would melt wires). Jim
 
Depends on which "12 volt" coil you use

If you use a coil marked "12 volts external resistor required" (1 1/2 ohms between + and - posts) you will need the resistor.

If you use a coil marked "12 volts No external resistor required" (3 ohms between + and - posts) you do not use a resistor
 
You do not need to replace the light switch. At 12 volts the amperage load will only be about half of what it was at 6 volts.
 

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