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early 2AR Lucas 36403 ammeters By Dave Porter, Technical and Customer Support at The Bonneville Shop Lucas supplied the 2AR ammeter for use in Triumph 650 motorcycles from 1962 through 1970, specified for both the 6 and 12 volt charging systems. The early unit-construction coil ignition models were specified with the Lucas 36296 or […]
Fitting the Lucas 36403 Ammeter Read More »
Lucas 149SA 47SA Ignition Switches By Dave Porter, Technical and Customer Support at The Bonneville Shop The Lucas 3 and 4-position ignition switches designated as 149SA and 47SA are very similar in design and appearance. Used extensively in the 1960s and through the early 1980s, Lucas supplied the British automotive and motorcycle industries with
A Look at the Lucas 149SA and 47SA Ignition Switches Read More »
…setting the timing. The Classic Twin Ignition is suitable for Triumph Unit Twins T100, T120, TR7RV, T140 Bonneville, Tiger, Daytona etc; Norton Atlas and 1968 Commando; Enfield Interceptor (Clockwise Rotation);…
Timing Tri-Spark Ignition – Classic Twin Ignition Read More »
By Dave Porter, Technical and Customer Support at The Bonneville Shop The headlamp shell is one of the most prominently displayed parts on a vintage British motorcycle, as it sits proudly between the forks and in front of the handlebar. All too often, a project motorcycle is acquired with a dented, rusted, or incorrectly fitted
A Guide To Triumph Headlamp Shells Read More »
Loose Rotor Nut or Rotr Center: Triumph Service Bulletin Twin 9-70 By Dave Porter, Technical and Customer Support at The Bonneville Shop “When the rotor has been in service for many years, the magnetism can decline, which leads to weaker output from the alternator.” This Triumph service bulletin, released September 2, 1970, was a reminder
Triumph Service Bulletin Twin 9-70: Rotor/Rotor Nut Read More »
…go a long way to keep the battery charged. It will also satisfy the demands of electronic ignition on the battery. When selecting a charging module for your 12-volt conversion,…
How To Convert Your 6-Volt British Motorcycle to 12-Volts Read More »
…left/right and fore/aft in their proper positions. I turn them another way for charging and ignition diagnostics) Potential Problems with LED Troubleshooting The two main problems encountered after installing LED…
Using LEDs with Traditional Turn Signal and High Beam Indicator Lights Read More »
…1971 model year. The 39595 high/low/horn switch was generally used as the left switch, while the identical 39596 controlled the directionals and had a “kill” button. These switches were interchangeable,…
A Brief Synopsis of the Lucas Console Switchgear and Its Evolution Read More »
…multimeter and read on. How it Produces Electricity The Lucas service manuals show 6 coils that represent the 6 poles in the single-phase alternator, wired in parallel pairs. Each time…
12 Volt Charging System Diagnostic Guide Read More »
We get a lot of calls from customers fed up chasing electrical gremlins and, upon questioning, we realize that they are troubleshooting an old, brittle and potentially hacked on original wiring harness. Deciding to replace the wiring harness is an easy choice in such situations and we stock a vast inventory of wiring harnesses to
Why do you offer 2 Different Wiring Harnesses for my Bike? Read More »