Ignition System Triumph BSA Unit Construction Singles 12 Volt

Ignition System Triumph BSA Unit Construction Singles 12 Volt

Boyer Bransden MKIV
High Power Ignition System
Triumph & BSA Singles
Unit Construction 12 Volt
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NZ$ 287.50
NZ$ 249.00 including GST
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Boyer Bransden Electronic Ignition Kits - Over 50 years Proven Performance

In 1969 Ernie Bransden designed and patented a miniature electronic ignition that was a fraction of the
size and far more efficient than any of its competitors. Since that time various electronic ignitions and
manufacturers have come and gone, but Boyer Bransden have been in constant production.

Today, Boyer Bransden produce one of the most efficient ignition systems in the world. All systems
are carefully hand built in the UK under the ethos of supplying hardy products that last.

The improved MKIV versions are designed to improve the timing stability if engine starting with a very low or variable battery voltage. The design changes are internal and do not affect the external appearance of the unit. Identified by the 'MKIV' caption on the label the new units are fully interchangeable with previously produced MK3 and MK1a units, and offer improved performance for both electric and kick start machines

British Spares Ltd offer full testing facilities, spares back up, and warranty claims processing for
Boyer Bransden ignition systems and components.

Boyer Bransden Electronic Ignition systems operate on 12 volts

For this reason, it is recommended that you install:

A 12 Volt ignition coil on single cylinder machines

A satisfactory 12 volt charging system with efficient voltage regulation will be required on models that were produced originally with 6 volt electrical systems.

These kits are used to replace the original Lucas Points Plate Assembly (and Condensers) and the Advance and Retard Mechanism. The Boyer Bransden Electronic Ignition is proved to be very reliable, easy to fit, with no maintenance.
For the best results setting ignition timing a stroboscope should be used.

Boyer Bransden Micro MkIV  Electronic Ignition System for Triumph & BSA Unit Construction Single Cylinder 4 Stroke engines with 12 volt electrics and timing side points housing including:

  • BSA C15 1963-67
  • BSA B40 1963-67
  • BSA C25 1967
  • BSA B25 1967-72
  • BSA B44 1966-70
  • BSA B50 1970-73
  • Triumph T20 Cub 1963-70 (Not Energy Transfer with 5 wire alternator)
  • Triumph TR25W 1968-70
  • Triumph T25 1971-72


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