Old Britts – Lucas Alternators for Norton Commandos
Download the complete PDF version using the green download button at the top right of this page for an Old Britts technical article covering Lucas alternator systems used on Norton Commandos. Written by Fred Eaton, this guide explains the differences between single-phase and three-phase Lucas alternator systems, available upgrade kits and compatible rectifier and regulator options for classic Norton motorcycles.
The article compares the original 130-watt pre-MK3 alternator, the later 180-watt MK3 system and the three-phase 180-watt upgrade kits available for all Commando models. Detailed sections explain the Lucas rotor and stator combinations, associated rectifiers, Zener diode requirements and modern solid-state regulator replacements from Podtronics, Boyer and Tympanium.
Further sections describe complete alternator upgrade kits including Lucas Powerbase, Lucas/Boyer and Lucas/Podtronics conversion systems. The guide also includes factory part numbers and reference pricing information for the various alternators, rotors, rectifiers and regulator components covered in the article.
Contents Include
- Lucas alternator systems used on Norton Commandos
- 130-watt single-phase alternator information
- 180-watt single-phase alternator details
- Three-phase 180-watt alternator upgrade systems
- Lucas rotor and stator part number references
- Zener diode and rectifier compatibility
- Podtronics regulator-rectifier conversions
- Boyer Power Box installation options
- Tympanium regulator-rectifier references
- Lucas Powerbase upgrade kit information
- Lucas/Boyer and Lucas/Podtronics alternator kits
- Factory alternator and charging system part numbers
- Electrical upgrade recommendations for Commandos
