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August 15, 2019


Custom Norton Commando Wiring Diagram – Steve Black

by Grant Tiller
Grant Tiller

This is a custom wiring diagram for Steve Black aka “raleighmodel6” from the Access Norton Forum

Steve has some good mods fitted to his Commando.


Probably the star of the show is the Colorado Norton Works Electric Start Conversion.

Grant Tiller

This really makes the bike worry free to ride in today’s traffic. no more panicking when you stall at the lights, just press the button and be on your way!


A popular upgrade in the late 70s and early 80s is the Lucas RITA electronic ignition system.

Grant Tiller

Easily spotted on the Norton Commando, the Lucas RITA needed a larger points cover to house the large “reluctor” plate.

Like many, Steve has fitted a Podtronics regulator/rectifier unit in lieu of the zener, rectifier and capacitor along with a 3 phase alternator for better charging in stop/go traffic.

Lucas RITA units are no longer in production, but a popular source for spares and repairs here in the UK is Rex’s Speedshop



Steve has fitted a SparkBright voltage monitor in lieu of the unreliable warning light assimilator.


Steve has also fitted twin horns on his bike – a great safety addition.

In order to lighten the load going through the handlebar switchgear, the twin horns operate via a relay.


Here is the electrical wiring diagram for Steve’s bike:

Good Quality JPG 1280×769

Grant Tiller

High Quality PNG 3066×1841

Grant Tiller

2 Comments Post a comment
  1. Graham Pearce
    Mar 26 2020

    Very nice wiring set up. Close to what I’m planning for my Mk3. I already have fitted Pazon ignition, three phase alternator and fitted solid state rectifier/regulator. Modified existing wiring to suit. Now I want to fully rewire eliminating, unused wires, head light simulator (Canadian spec) adding Sparkbright voltage monitoring, fuses (4) and relays (ignition, head light and horn). Eliminate under tank connectors, use modern waterproof connectors for handlebar switch harnesses etc, and wired earth. All pretty much included in the various diagrams you have published.
    Thanks for the inspiration

    • Mar 26 2020

      Hi Graham – great to hear from you!

      I have had a lot of feedback about the wiring diagrams – main thing has been “yeah, that’s great but where is the MKIII)

      So i have been working on building a set of MKIII drawings, which will be published later today!!!

      Hopefully these will help you!



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