Tech Blog

From Dave Porter, Customer and Tech Support at The Bonneville Shop I have always admired the Norton Commando series of motorcycles, not…

Part 2: Resurrecting a Barn Bike: Hydraulic Brake Restoration (non-ABS) Triumph Hydraulic Brake Restoration By Mike Grage: Tech and Customer Support…

By Mike Grage, Tech and Customer Support at The Bonneville Shop and British Iron Carb Cleaning and TuningFloat Bowl/Fuel System Ventilation:Float Bowl…

…need to be removed. After that we need to make sure the engine rotates smoothly. For this we use the…

Lucas 149SA 47SA Ignition Switches Ignition Switches47SA 3-Position Ignition Switch149SA 4-Position Ignition Switch       The Takeaway     The Lucas 3 and 4-position ignition switches…

Dave Porter, Customer Service and Tech Support AMC      Looking back on some of the more revered names in the annals of…

     Triumph T100 Top End – The Conundrum of Triumph C-Range Top-End Compatibility     Unfortunately, I have chosen to take on a…

…setting the timing. The Classic Twin Ignition is suitable for Triumph Unit Twins T100, T120, TR7RV, T140 Bonneville, Tiger, Daytona…

…including RK Leighton, P&P Seating Ltd, and Wassell Ltd. P&P Seating was a supplier of premium-grade reproduction seats, and once…

Lucas Kill Switches and Cutouts 4A Cutout – Kill Switch: 762080, 76200A, and 762204SS5 – Lucas Kill Switch: 31071, 31376SS5 -…

Norton motorcycle photos from our customers here at The Bonneville Shop. Check out or stock of parts for your Norton….

From Guest Expert: Don Johnson To use an o ring with the gearbox sprocket you must have a high gear spline…

The Imperiled Life of the Kickstarter Cotter Pin One of the hallmarks of vintage BSA and Triumph motorcycles is the kickstart…

Triumph and BSA Frame and Engine NumbersWhere are the Frame and Engine Numbers?Registration and Title Documents for Year Make Model    …

If you’re working on setting up dual carbs for your bike, check out this guide. Peg from the UK is…

…BSA and Triumph specified the 7” flatback headlamp shell for the 750 triples through the 1972 model year. 1971 saw…

    It’s been said many times that nothing wakes up an old British motorcycle like a new carburetor. Amal carb…

A Bit About Fender Stays “…there are many different configurations of fender stays to be considered when selecting the correct ones…

   Dave Porter, Customer and Tech Support at The Bonneville Shop Barn Bikes Abound – BSA Motorcycles “…not only are they plentiful, but…

…be left in the shop where they are most needed, making them easily accessible when needed. Parts Catalog Selection View…

Dave Porter, Customer and Tech Support at The Bonneville Shop Steps to Install New Clutch RubbersUsing a Clutch Locking ToolThe Disassembled…

…of their sealing properties due to distortion. Stat-O-Seal and Dowty Washers Stat-O-Seal and Dowty washers are a metal washer with…

Dave Porter, Customer and Tech Support at The Bonneville Shop There are 4 basic steps on how to apply a waterslide…

A motorcycle fender will restore your classic Triumph to its true glory. Don’t put an old, compromised fender on your…

Loose Rotor Nut or Rotr Center: Triumph Service Bulletin Twin 9-70 Dave Porter, Customer and Tech Support at The Bonneville…

Winterizing your classic Brit bike is one of the most important things you can do. For those of us living…

The Nuts and Bolts of Hardware By Dave Porter, Customer and Technical Support at The Bonneville Shop “…a factory parts catalog is…

…would need to double the speed of rotation of the generator to charge a 12-volt battery.”       For generator/dynamo…

130 Link 530 Chains By Dave Porter, Customer and Technical Support at The Bonneville Shop   We recently procured a substantial quantity of…

Motorcycle polish: yes or no? Did you just get your hands on a solid barn bike? How long was it…

By Dave Porter, Customer and Technical Support at The Bonneville Shop A Guide to CablesThrottle cablesClutch CablesBrake Cables As a customer service…

Buy a bearing race puller today. If you’re doing any motorcycle restoration, having the right tools is essential. Bearings, including…

– For Triumph and BSA forks up to 1970 (up to 1974 on the Triumph 500 twins and some of the…

By Dave Porter, Customer and Technical Support at The Bonneville Shop Table of Contents for triumph top end sealingResourcesConsiderations For…

By Dave Porter, Customer and Technical Support at The Bonneville Shop Primary Chaincase Cover: 57-1727 Primary Chaincase Cover: 57-2439 Primary Chaincase Cover: 71-7465 The…

By Mike Grage, Customer and Technical Support at The Bonneville Shop written in partnership with British Iron, our Modern Triumph…

‘A Guide for BSA and Triumph Oil Pressure Switch Identification’ By Dave Porter, Customer and Technical Support at The Bonneville…

Pattern Parts and Fettling to Perfection By Dave Porter, Customer and Technical Support at The Bonneville Shop Occasionally I receive inquiries from…

By Mike Grage, Customer and Technical Support at The Bonneville Shop Power FlowPotential Problems with LED TroubleshootingLED Troubleshooting: Using LEDs with…

The 1970 Triumph TR6R Build Continues: Rotor and StatorPrimary Chaintiming cover and outer gearbox The 1970 Triumph TR6R Build Continues: Rotor…

The 4th One – 1970 Triumph TR6R RepairFinding a Barn BikeDisassemblyEvaluating the Parts and PrepWheels and forksEngine Cases, Crank and…

Doug Hele and the Daytona1967 – 1969 Triumph DaytonaThe end of the Classic Triumph Daytona By Dave Porter, Customer and Technical…

By Mike Grage, Customer and Technical Support at The Bonneville Shop The Chrome of Before – Real ChromeLegislative ChangesTrivalent Chrome The Chrome…

By Mike Grage, Customer and Technical Support at The Bonneville Shop Function of Electronic Ignition SystemsTesting Functionality Here at The Bonneville Shop…

…specified for the Triumph twins through the 1966 model year and still required thread sealant if it was expected to…

By Mike Grage, Customer and Technical Support at The Bonneville Shop How to Wire it UpSetting the Timing So, you bought a…

…proposed for this floating brake disc rotor, is to substitute (4) of the 21-0692 12-point cylinder base nuts, for the…

BSA Motorcycles: Thunderbolts and Lightning, very, very frightening me! (Galileo) Galileo (Galileo) Galileo… By David Porter, Customer and Technical Support at The…

By David Porter, Customer and Technical Support at The Bonneville Shop Clutch Plates AND Springs Clutch Plates When evaluating the clutch plates and…

By David Porter, Customer and Technical Support at The Bonneville Shop History of the 1978 Triumph Bonneville1976 Models1977 Models1978 Triumph Bonneville…

…modification. This is not true; camshaft selection depends on the application. The more lift/duration you have, the more compression is…

UK made fenders from Speedwell Mudguards uses the original tooling and machines to replicate OEM length, width, radius and even…

By David Porter, Customer and Technical Support at The Bonneville Shop Establishing Ignition TimingConverting to an Electronic IgnitionFully Advanced Timing PositionUsing…

Have you seen our blog on Cam Timing Notes or Cam Timing Notes – Part II? Dave has written up a…

By David Porter, Customer and Technical Support at The Bonneville Shop Lucas Console Switchgear Guide The Back Story During the late 1960s, the…

…the key off and all regulator/rectifier wires connected, connect the ammeter (or multimeter with 10A capability) between the regulator/rectifier wire…

By David Porter, Customer and Technical Support at The Bonneville Shop Table of Contents Installation Instructions Shop The Layshaft Need…

Function of Carburetor Mounting OringsThick 244/1048 OringsThin 622/101 OringsAdditional HardwareMeasuring the Gap By David Porter, Customer and Technical Support at The…

By David Porter, Customer and Technical Support at The Bonneville Shop Custom Motorcycle CableChoke and Throttle CablesFront Brake custom motorcycle cable Custom…

By David Porter, Customer and Technical Support at The Bonneville Shop From time to time, we receive reports from customers working…