Tech Blog

Considerations for Handlebar Changes By Mike Grage, Technical and Customer Support at The Bonneville Shop and British Iron. Most people in the…

An Overview of the Smith’s BG5330 Speedometer Drive Units By Dave Porter, Technical and Customer Support at The Bonneville Shop …

Hinckley Triumph Maintenance and Restoration Part 3: Resurrecting A Barn Find Hinckley By Mike Grage, Technical and Customer Support at The…

early 2AR Lucas 36403 ammeters By Dave Porter, Technical and Customer Support at The Bonneville Shop      Lucas supplied the 2AR…

Triumph T140 Rear Rim Retrofit and Service Bulletin 4-77 By Dave Porter, Technical and Customer Support at The Bonneville Shop Triumph T140…

…Preliminary checks of fuel level in the petrol tank, adequate flow of fuel through the petcocks (and inline filters, if…

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

…will cause property damage, injury, or death. This should be done on the shop floor, so the pistons won’t fly…

By Mike Grage, Technical and Customer Support at The Bonneville Shop and British Iron. Carb Cleaning and Tuning Float Bowl/Fuel…

…holes in a diamond formation between idle mixture port and throttle butterfly. Clogged transfer ports cause stumbling off idle. While…

Lucas 149SA 47SA Ignition Switches By Dave Porter, Technical and Customer Support at The Bonneville Shop Ignition Switches47SA 3-Position Ignition Switch149SA 4-Position…

By Dave Porter, Technical and Customer Support at The Bonneville Shop AMC      Looking back on some of the more revered names…

     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…

By Dave Porter, Technical and Customer Support at The Bonneville Shop     If you have been searching for seat supply for…

Lucas Kill Switches and Cutouts By Dave Porter, Technical and Customer Support at The Bonneville Shop 4A Cutout – Kill Switch: 762080,…

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…

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

…have a points setup, especially look for loose springs connecting the bob weights. Set the ignition timing exactly for both…

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

    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 By Dave Porter, Technical and Customer Support at The Bonneville Shop “…there are many different…

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

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

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

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

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

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 By Dave Porter, Technical and Customer Support at The…

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, Technical and Customer Support at The Bonneville Shop “…a factory parts catalog is…

…go a long way to keep the battery charged. It will also satisfy the demands of electronic ignition on the…

130 Link 530 Chains By Dave Porter, Technical and Customer 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, Technical and Customer 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…

By Dave Porter, Technical and Customer Support at The Bonneville Shop – For Triumph and BSA forks up to 1970 (up…

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

…was the last part number, appearing in the 1981-1985 parts books, however it was preceded by the more common 71-7003…

By Mike Grage, Technical and Customer 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, Technical and Customer Support at The Bonneville Shop The…

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

…left/right and fore/aft in their proper positions.  I turn them another way for charging and ignition diagnostics) Potential Problems with…

…crankshaft, and the stator studs are not bent, so this procedure passed with flying colors. Primary Chain 𝙄 𝙝𝙖𝙫𝙚 𝙖𝙙𝙟𝙪𝙨𝙩𝙚𝙙…

By Dave Porter, Technical and Customer Support at The Bonneville Shop The 4th One – 1970 Triumph TR6R RepairFinding a Barn…

By Dave Porter, Technical and Customer Support at The Bonneville Shop Doug Hele and the Daytona1967 – 1969 Triumph DaytonaThe end…

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

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

…and C-range telescopic forks is the fork oil seal holders, or “dust excluder sleeve nuts”, as termed in the Triumph…

By Mike Grage, Technical and Customer Support at The Bonneville Shop and British Iron. How to Wire it UpSetting the Timing So,…

By Dave Porter, Technical and Customer Support at The Bonneville Shop SpecsFitment ChallengesSolutions We have recently taken delivery and sold through our…

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

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

…new finishes, Tawny Brown and Gold was met with limited enthusiasm in the US, and some 480 units were sent…

Checkout Cam Timing Notes Part I here and The Brain of Your Triumph B Range Engine- the Camshaft. Cam Timing ContentsCheckout Cam…

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

…the factory workshop manual for more guidance, only to learn that the flywheel on your engine’s crankshaft has only one…

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