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early 2AR Lucas 36403 ammeters 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 36084 ammeter to suit the 8 amp alternators, while the change […]
Fitting the Lucas 36403 Ammeter Read More »
Lucas 149SA 47SA Ignition Switches 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 many common switches. The 47SA was most commonly associated with automotive
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, Customer and Technical 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 Dave Porter, Customer and Tech 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 to
Triumph Service Bulletin Twin 9-70: Rotor/Rotor Nut Read More »
By Dave Porter, Customer and Technical Support at The Bonneville Shop Converting Your 6-volt British Motorcycle to 12-volts can be a bit of work.“The conversion requires not just an upgrade of charging system components, but also auxiliary electrical components. This includes light bulbs, horn, fuses, and in some cases, switches, ignitions, and ignition coils.”
How To Convert Your 6-Volt British Motorcycle to 12-Volts Read More »
By Mike Grage, Customer and Technical Support at The Bonneville Shop LED Troubleshooting – We didn’t have LEDs when I started professionally wrenching on motorcycles over 30 years ago, but I most certainly wish we did due to the low power requirements. Done right LED lighting can make riding a battery less bike at night
Using LEDs with Traditional Turn Signal and High Beam Indicator Lights Read More »
The Back Story During the late 1960s, the BSA Group was busy developing the next generation of Triumph and BSA motorcycles at a leased 17th-century mansion in Warwickshire, known as Umberslade Hall. Situated nearly equidistant from Redditch, Small Heath, and Meriden, the research and development facility was the epicenter for the design teams to update
A Brief Synopsis of the Lucas Console Switchgear and Its Evolution Read More »
By Mike Grage, Customer and Technical Support at The Bonneville Shop 12 Volt Charging System – Quite often we get questions about electrical diagnostics, most common is the charging system and how to test rectifiers. Whether it is a solid state or the factory diode pack, they work the same. The first bit of advice
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 »