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Triumph T140 Rear Rim Retrofit and Service Bulletin 4-77 Triumph T140 Rear Rim Retrofit and Service Bulletin 4-77 After reviewing some old Triumph Service Bulletins, I came across one that may be of interest to restorers of the 1976-1977 Triumph 750 twins, number 4-77, dated December 7, 1977. The bulletin details the running change of […]
Triumph T140 Rear Rim Read More »
…the Keihin pilot jet must also be clean and clear. It is recommended to strip a length of copper wire and use a single strand to make sure the fuel…
Constant Velocity Carburetor Cleaning/Tuning Tips & Tricks Read More »
Triumph T100 Top End – The Conundrum of Triumph C-Range Top-End Compatibility Unfortunately, I have chosen to take on a topic that usually results in confusion and misunderstanding. As the resident anorak and customer service guide for The Bonneville Shop, I have set out to compile a timeline for the running changes during the
The Conundrum of Triumph C-Range Top-End Compatibility 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 »
If you have been searching for seat supply for your vintage British motorcycle as of late, you may find that many of the best-selling seats have been out of stock with many suppliers for months now. There have been some contributing factors that have left the supply chain in peril, including a general economic
A Word About BSA, Norton, and Triumph Seat Supply Read More »
Lucas Kill Switches and Cutouts In this technical blog I will cover some of the functions and applications of the more common cutout buttons, or “kill switches” supplied by Lucas during the 1950s and 1960s. The function of the various cutout switches evolved from single-wire grounding switches, as fitted to magneto ignition machines, to
A Look at the Mysterious Lucas Cutout/ Lucas Kill Switches Read More »
From Guest Expert: Don Johnson To use an o ring with the gearbox sprocket you must have a high gear spline grooved for the o ring as well as the chamfered sprocket. Oring will demand the correct locking washer for nut. If spline is grooved put sealant on sprocket splines. Push on sprocket, install o
Gearbox Sprocket: Tips for a Grooved High Gear Spine and Chamfered Sprocket Read More »
What’s your year, make model? If you have ever called in to place an order with The Bonneville Shop, or for some technical advice, chances are you have talked with me. Once the conversation is underway, my typical first question is: What is the year make model of the motorcycle you are working on?
Year, Make, Model – What Are You Working on Today? Read More »
A motorcycle fender will restore your classic Triumph to its true glory. Don’t put an old, compromised fender on your Triumph project bike; Vintage Triumph fenders are stocked by part number and dimensions. Mudguards are undrilled to allow you to easily fettle the fender into place. Speedwell fenders offer several materials for any project including:
By David Porter, Customer and Technical Support at The Bonneville Shop History of the 1978 Triumph Bonneville As any experienced Triumph parts expert will tell you, the 1978 Triumph Bonneville model year presents some challenges when making recommendations for suitable replacement parts for the Triumph Bonneville T140 models. To help understand why this is, a
What exactly is a 1978 Triumph Bonneville? Read More »