Check the listing for details. BSA A50 / A65 Boyer-Bransden Red Box Ignition System KIT00081. Condition: New. Listed at 190.75 USD. 12v Boyer Bransden Micro Digital Ignition Kit for BSA & Triumph Twins and Royal Enfield InterceptorSuitable for positive or negative earth, points on side Models (6V coils are recommended for racing use) ;• Triumph Bonneville/Tiger/T100/T110/T120 /T140/140V/140E• BSA A50/A65• Royal Enfield Interceptor The Micro Digital ignition provides almost total control over ignition functions. In common with the MKIII, it offers electronic control of advance and retard functions. However, because the Micro Digital features a built-in computer, the size of a postage stamp, it can make more than a million ignition decisions per second, to constantly monitor engine speed and time the spark precisely to suit. The programming of this micro processor also gives control over ignition coil energy, starting speed, tickover stabilisation and rev limits!In common with the MKIII these systems are manufactured using the finest semiconductors and are fully encapsulated to protect against moisture intrusion. All units are guaranteed for five years.Designed to work with standard coils.