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Mike Grage, Technical and Customer Support at The Bonneville Shop and British Iron 446 LED Update for 2026 There have been a few changes to the parts that are available to us from when I first started working for The Bonneville Shop in July 2021. Back then I was tasked with providing a solution to […]
446 LED Update for 2026 Read More »
…back and forth in an effort to tighten the bezel. Eventually the tabs would break off and no longer hold the ammeter in place. 1968-Onwards Lucas 36403 Ammeters The later…
Fitting the Lucas 36403 Ammeter Read More »
Lucas 149SA 47SA Ignition Switches By Dave Porter, Technical and Customer Support at The Bonneville Shop Ignition Switches 47SA 3-Position Ignition Switch 149SA 4-Position Ignition Switch The Takeaway The…
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 »
…6-volt British motorcycles with alternators, you will need to source a 12-volt regulator/ rectifier, or what I call a charging module. Today’s charging modules are solid-state, compact, and vibration-resistant. Some…
How To Convert Your 6-Volt British Motorcycle to 12-Volts Read More »
By Mike Grage, Technical and Customer Support at The Bonneville Shop and British Iron. 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
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 »
…good bottom number on a full wave system, and 40VAC on a 3-phase system. Rectifier Testing The next component to test is the rectifier. The purpose of a rectifier is…
12 Volt Charging System Diagnostic Guide Read More »