Tech Blog

A Look at the Amal Concentric Floats      In this blog I will cover some information regarding the Amal Concentric MK1…

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…

…loupe or some high magnification glasses are very useful because the smallest scratch or smallest crack in the carb body…

By Mike Grage, Tech and Customer Support at The Bonneville Shop and British Iron When I started my career as a…

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 Commando Joe – A 73 Norton Commando he saved from a Chopper Alan’S Norton 850 Commando Alan’s Norton 850…

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    …

…definitely do not want air leaks. Set the valve clearances accurately. Check the ignition advance mechanism if you still have…

By Dave Porter, Customer and Technical Support at The Bonneville Shop Table of Contents for Triumph Headlamp ShellsLucas SS 700 7”Lucas…

…with plain nuts to secure the carburetor to the manifolds, usually with a thick phenolic insulating spacer and paper gasket…

…consider: Measuring a Fender Stay Width Distance from mounting holes Length Diameter Fender Stays And Measurements   Part Number Color…

   Barn Bikes Abound – BSA Motorcycles Over the past several months, we’ve seen the volume of BSA parts sales…

Dave Porter, Customer and Tech Support at The Bonneville Shop Work Smarter, Not HarderAdvantages to a Printed Parts CatalogParts Catalog Selection Parts…

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

‘Sealing Washers and the Oil-Tight Triumph Engine’ by Dave Porter, Customer and Tech Support at The Bonneville Shop Fiber WashersCopper WashersStat-O-Seal…

…There will be more time to accurately place the decal to the desired location when it is well saturated, since…

…fenders and rear fenders for your Triumph 650 or 500 twin or your 750 Triple. As these are undrilled, they can…

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…

By Dave Porter, Customer and Technical Support at The Bonneville Shop Converting Your 6-volt British Motorcycle to 12-volts can be a…

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…

…for handlebar fitment depending on the intended market the motorcycle was produced for. Most Home-market (UK-spec) models were fitted with…

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…

…seal sits), the overall length of the push rod tube, as well as the depth of the machining in the…

By Dave Porter, Customer and Technical Support at The Bonneville Shop Table of Contents Primary Chaincase Cover: 57-1727 Primary Chaincase…

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…

…drilling sheet metal. Some time ago, we had a report from a customer regarding an 83-1571 grab rail, intended for…

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…

…spark plug lead with spark plug caps off. A no spark condition is generally caused by bad coils which is…

…performed at the dealership upon set-up of the motorcycles right out of the crate – such as eliminating oil leaks….

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

…standard 3/8-drive 9/16 socket is applied to the nut, there is often not enough clearance to gain acceptable purchase on…

By David Porter, Customer and Technical Support at The Bonneville Shop Table of Contents 1930s BSA History 1940s BSA History…

…aid in adhesion to the friction plates during clutch engagement. The inspection of the locating tabs on the friction plates…

By David Porter, Customer and Technical Support at The Bonneville Shop Table of Contents History of the 1978 Triumph Bonneville…

…of the valve opening/closing. Nose: Where valve max lift occurs. The shape is critical for preventing valve float. Dwell: The…

…fitment. Table of Contents Stacy on Speedwell Mudguards How these UK made fenders are Measured Stacy on Speedwell Mudguards https://www.youtube.com/watch?v=oaw0E4LkteM…

…will be using the earlier ¼”-26 bolt for this exercise. The next step will be to remove the timing aperture…

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…

By Mike Grage, Customer and Technical Support at The Bonneville Shop How it Produces ElectricityStator TestingRectifier TestingRegulator Testing 12 Volt Charging System…

…When using our TBS-0041 layshaft bearing drift tool, be sure to place the 57-1607 thrust washer on the locating peg…

…the forthcoming 1970 model year, which also saw the introduction of the thick 70-9711 carburetor flange O-ring, and the omission…

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