How to Convert a 6-volt Stator to 12-volt

Earlier motorcycles were often fitted with 6 Volt, 3 phase stators. These can easily be converted to a 12 Volt, single phase stator. All it takes is a simple wiring modification.

Motorcycle fitted with stators like the Lucas 47204, or the Lucas 47194, typically have 6V coils. Each coil is arranged in a three-phase star format.

Two of these phases are joined together during manufacture. This then created just two separate AC output supplies. Historically called the high and low outputs.

A third wire was then provided as a neutral or ground. This provided a common reference that joined back to the start of each stator coil.

By combining the high and low 6V supplies, you can create a 12V supply. This new 12-volt supply has enough power to run a modern 12V regulator rectifier.

Step by Step Stator Conversion Guide

To converter classic high and low output stators to 12 volts follow these simple steps:

  1. Convert all electrical parts to 12V DC including the battery and all lighting
  2. Connect the Green/Yellow and Green/Black wires together. This is now the live AC supply for your 12V regulator rectifier (AC1)
  3. The Green/White is your other AC wire and is the neutral/ground (AC2)
  4. Connect AC1 & AC2 to your regulator rectifier

For further help check out the following electrical schematic.

Stator Voltage Conversion Wiring Diagram PDF

M-7-0-PDF – 6V to 12V Stator Conversion Motorcycle Electrical Schematic

Wiring diagrams can be large files. Please be patient while the file loads.

Downloadable Stator Conversion Wiring Diagrams


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