Real-world electrical guides, schematics and restoration help. No sponsors. Nothing for sale.
If you’ve landed here hunting for a Norton Commando wiring diagram, you’re in the right place. BritSpark is built on an engineering background applied to decades of hands-on restoration work, with a particular focus on the electrical systems that catch out more restorers than anything else. Norton Commando coverage runs deepest here, but the site reaches into other classic British motorcycles too, including other Nortons, Triumphs, Specials and beyond.
What You Will Find Here
Wiring diagrams and electrical schematics sit at the heart of this site, with Norton Commando coverage running deeper than anywhere else you are likely to find for free. Alongside that, the site covers:
- Wiring diagrams – mainly Norton Commandos but covering other classic British bikes too.
- Electrical troubleshooting – practical, step-by-step help for the problems that actually occur.
- Technical how-tos – written in plain English, not workshop manual-speak.
- Parts & suppliers – honest views from someone with nothing to gain.
- Workshop knowledge – tips, techniques and the occasional hard-won lesson.
One thing you will notice throughout is a habit of questioning received wisdom. The classic bike world carries decades of folklore, and not all of it holds up. Where something does not stack up, I will say so and show my working.
You Are Not Alone
The same questions come up again and again, from across the UK, Australia, Canada, South Africa and beyond. Norton Commando electrical gremlins, in particular, have a remarkable way of baffling people who are otherwise very capable restorers.
Ready to Dive In?
Hit the picture above to head straight into the full list of articles. If you cannot find what you are looking for, get in touch. The answer is either already here or well worth adding.
About Grant
I’m Grant Tiller, and this site is the result of decades spent around classic British motorcycles, most of it up to my elbows in Norton Commando wiring.
It started in the shed with my Dad. He was the one who lit the spark, and in many ways this site is a continuation of what we began there together. That passion turned into something more serious over time: I trained as an electro-mechanical engineer, moved into electronics and communications, and eventually settled in computing. I’m a member of both the IEEE (the Institute of Electrical and Electronics Engineers) and the IET (the Institute of Engineering and Technology) but have spent the last couple of decades working in Product Management for SaaS companies. None of that makes me infallible. I still learn something new most weeks, and where the received wisdom in the classic bike world doesn’t hold up under testing, I’ll say so and show my working.
I don’t sell anything here, I’m not sponsored, and I have no financial arrangement with any manufacturer or supplier. I’ve never made a cent from the hundreds of hours I’ve spent drawing diagrams, testing components on the bench, and helping restorers around the world get their bikes back on the road. When I recommend something, it’s because I’ve used it, tested it, or seen it working with my own eyes.
If any of that sounds familiar, this site was built for you.