CDI Digital Lighting & Ignition Alternator Kit – BSA, Triumph & Norton Twins – Electrex World

This CDI digital ignition alternator kit Norton BSA Triumph twins — Electrex World CDI Digital Lighting & Ignition Alternator Kit is the ultimate all-in-one electrical upgrade for classic British parallel twin motorcycles. This self-generating CDI system completely replaces the original Lucas alternator, contact breakers, points, and distributor — eliminating the need for a battery entirely while delivering a reliable 65W DC charging circuit for running lighting.

The kit features a pre-programmed digital CDI advance curve optimised for British 4-stroke twin engines, providing strong spark energy from cold and maximum performance at all RPM. The innovative taper locking collet rotor mount eliminates the need for a Woodruff key — fitting directly onto the ¾” crankshaft taper even on a worn or damaged keyway, with infinite rotational positioning for precise ignition timing setup.

Compatibility

Fits BSA, Triumph, and Norton parallel twins, including:

• BSA A65 & A50 unit twins
• Triumph T100, T120, and all unit twins
• Norton Atlas and Commando
• Royal Enfield Interceptor (with modification — call for details)

Key Features

• Self-generating CDI ignition — no battery required to run ignition or lighting
• 65W DC output — 6V or 12V user-selectable (cut the blue wire to select voltage)
• Pre-programmed digital advance curve: 27° or 15° advance, user-selectable
• Programmed rev limiter included
• Spark generated at 300 RPM for effortless cold starting
• Taper locking collet rotor — no Woodruff key required; fits worn or damaged keyways
• Operates within the engine oil — stator runs inside the timing case
• Replaces Lucas alternator, points, condenser, and mechanical advance unit
• DC output charges a battery or can run with a capacitor pack (sold separately)
• Manufactured in the UK by Electrex World

Kit Contents

• Stator (operates within engine oil)
• Taper locking collet rotor assembly
• Digital CDI unit
• Regulator/rectifier (6V/12V selectable)
• HT coil with 5K plug caps
• Wiring connectors and fitting hardware
• Full wiring diagram and installation instructions

Note: A battery is not required to run the ignition or lighting but is beneficial for brake lights, indicators, and accessories. The battery can be replaced with a PP12 capacitor pack for greater reliability.