Old Britts – Checking Out Your Bike's Charging System
Download the complete PDF version using the green download button at the top right of this page for detailed Norton Commando charging system testing and battery drain diagnostic procedures. This technical article from Old Britts explains how to properly test motorcycle charging system output voltage and identify electrical issues that may cause battery discharge while riding or during storage.
The guide covers charging voltage testing procedures using a volt meter, including correct charging system output readings of approximately 13.6V to 14.4V at around 2000 RPM.
Additional troubleshooting information is included for identifying parasitic battery drain and electrical current draw when the ignition key is switched off.
This resource also includes references to instructional testing videos demonstrating charging system diagnostics and battery drain testing methods commonly used on classic British motorcycles.
Contents Include
- Charging system voltage testing
- Battery drain diagnostic procedures
- Parasitic current draw checks
- Volt meter testing methods
- Charging output specifications
- Key-off electrical drain testing
- Battery discharge troubleshooting
- Electrical system inspection tips
- Classic motorcycle charging diagnostics
- Workshop testing procedures
