Shop the UK-made Electrex World STK-102D digital CDI ignition and alternator kit for selected Triumph, BSA, and Norton twins. This combined conversion replaces the original contact-breaker ignition and charging components. Check the product listing for model compatibility, included parts, and installation requirements.
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Electrex World Ignition & Alternator Kits for Classic British Motorcycles
Shop Electrex World electrical upgrades for selected classic Triumph, BSA, and Norton motorcycles at The Bonneville Shop. Our current selection features the UK-made STK-102D digital CDI ignition and alternator kit, designed to replace the original contact-breaker ignition and charging components on specified alternator-equipped British twins.
Electrex World has been producing motorcycle electrical components in the UK for over 30 years, with the vast majority of its range designed and built in-house. Around 90–99% of its products are manufactured in England using modern equipment, which gives the brand tight control over quality and consistency. The company supplies parts worldwide and is an OEM supplier to other manufacturers, as well as a popular choice in the classic and performance aftermarket.
For owners planning an ignition and charging-system conversion, this kit brings the main replacement components together in one package. Check the individual product listing and supplied fitting instructions to confirm compatibility with your motorcycle before ordering.
UK-Made Motorcycle Electrical Components
Electrex World manufactures motorcycle electrical components in the UK. The STK-102D kit in our collection combines a digital ignition system with a replacement alternator, providing a coordinated conversion rather than an ignition-only replacement.
This distinction matters when planning a rebuild: installation replaces several original components, so the kit should be considered as a complete ignition-and-charging project rather than a replacement for a single failed part.
What Is the STK-102D Digital CDI System?
CDI stands for capacitor-discharge ignition. The Electrex World STK-102D uses a self-generating digital ignition system with a pre-programmed advance curve for its specified four-stroke twin-cylinder applications. It does not require the original contact-breaker points or mechanical auto-advance assembly to operate.
Unlike an ignition-only conversion that retains the existing alternator, this kit also replaces the alternator components. The package includes a replacement stator and rotor, digital CDI module, regulator/rectifier, dual-output ignition coil, two 5K-resistance spark-plug caps, and fitting components.
Applications for Triumph, BSA & Norton Twins
Our product listing identifies the following motorcycle applications:
- Triumph T100, TR6, and T120.
- BSA A50 and A65.
- Norton Commando.
The listing specifically states that this kit is not specified for Triumph 750 twins. It should therefore not be presented as a universal conversion for all Triumph, BSA, or Norton motorcycles. Confirm your exact model, year, and existing electrical arrangement against the product details and fitting instructions.
Self-Generating Ignition & Battery Considerations
The STK-102D’s self-generating ignition does not require a battery to produce its ignition supply. Your product listing also states that the system can operate with or without a battery.
However, battery-independent ignition does not mean every motorcycle accessory will operate satisfactorily without stored electrical power. Electrex World’s instructions discuss battery or capacitor-pack arrangements and their implications for lighting and other equipment. Follow the instructions supplied with the exact kit when planning the electrical installation.
Plan the Conversion Before Installation
Installing the STK-102D involves removing the original alternator stator and rotor, zener diode, rectifier, contact-breaker points plate, auto-advance unit, and ignition coils, where fitted. The replacement system must then be installed and timed according to the supplied instructions.
Review the wiring diagram before beginning work, especially if the motorcycle has previously been rewired or fitted with nonstandard electrical components. Your product listing supplies installation instructions and recommends verifying compatibility and completing the installation and timing setup using appropriate service information or a qualified technician.
Why riders choose Electrex World
The brand is known for robust construction, stable output and reliable starting, making it a popular upgrade over aging OEM charging and ignition components on classic bikes. UK-based design and manufacturing, combined with competitive pricing versus many OEM or “big name” brands, gives Electrex World strong value for riders who want modern performance while keeping period-correct hardware on their machines.
Find Electrex World Parts for Your Motorcycle
View our Electrex World kit below for application details, included components, and installation information. Confirm the motorcycle’s specifications and the exact kit version before purchasing so you can plan the conversion around the correct wiring and charging requirements.
For more regulator/rectifiers, click on the link .