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6 Volt to 12 Volt Stator Conversion

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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.

Lamberts Bikes, Lucas 6V Stator
Lucas 6V stator

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:

6-volt to 12-volt stator conversion

  1. Convert existing electrics

    Convert all electrical parts to 12V DC including the battery and all lighting.

  2. Connect high and low coils

    Connect the Green/Yellow and Green/Black wires together. This is now the live AC supply for your 12V regulator rectifier (AC1).
    The Green/White is your other AC wire and is the neutral/ground (AC2).

  3. Connect regulator rectifier

    Connect AC1 & AC2 to your regulator rectifier

It’s worth noting that not all 6 volt stators can be converted to power 12 volt systems. Always double check the model of your stator prior to cutting any wires!

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.


FREE Downloadable Stator Conversion Wiring Diagram

Download a copy of Lamberts Bikes 6V to 12V stator conversions wiring diagram for FREE! Just click the download button below:



Learn more…

To learn even more about your motorbikes power circuit, view “how do a regulator rectifiers work?”

Want to learn more about regulator rectifiers? Don’t miss our motorcycle regulator rectifier data library.


Download more wiring diagrams for FREE!


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