Tech Blog

Mike Grage, Technical and Customer Support at The Bonneville Shop and British Iron 446 LED Update for 2026 There have been a…

Dave Porter, Technical and Customer Support at The Bonneville Shop. Motorcycle Wheel Building     One of the more satisfying elements of the…

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…

By Dave Porter, Technical and Customer Support at The Bonneville Shop      In this blog I will cover some information regarding…

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

…the bore, you will need to use c-clamps and compressed air to get it out. Warning: Keep your fingers clear…

…air to make sure it’s clear. On a Keihin CVK the air inlet is on the air cleaner side of…

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

…on late-model Triumph TR7 and T140 motorcycles from 1979-onward (according to the suppliers, but not confirmed in the parts catalogs),…

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

…relationship between the tappet guide blocks, pushrod tubes, cylinder heads, and the combination of sealing washers that were used over…

Video Guide: Timing Tri-Spark Ignition https://www.youtube.com/watch?v=TJ3WhtuUCu4 The Tri-Spark Classic Twin utilizes 21st century technology to provide simple installation without the…

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

…H27 illustration indicate the ignition cutout button, as specified for the TR6 and T120 models, however this combination was only…

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

…Sprockets 4 Speed And 5 Speed High Gear Nut Combo Spanner Pn# Tbs-0568 61-6061 61-6125 4-Speed High Gear Nut Socket…

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    …

By Dave Porter, Technical and Customer Support at The Bonneville Shop If you’re working on setting up dual carbs for your…

…warning light, and grommet hole. 5/16-26 CEI bolt holes. 59734S (99-9971B) 1967 Triumph 500 and 650 models. Ammeter, lighting switch,…

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

…Meanwhile, the T100C and TR6C models with stainless mudguards were fitted with black stays. With the vast catalog of mudguards…

   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…

…decal application cannot be overstated.” 2. Preparing the Decal 3. Applying the Decal 4. Finishing Coat   1. Surface Preparation…

…Triple. As these are undrilled, they can also be fitted to custom bikes, swingarm model Pre-Unit twins, and many others! Check…

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

…System Winterizing Your Classic Brit Bike with a Covering Winterize Your Brit Bike Fuel System Fill the petrol tank with…

…check out The Bonneville Shop – YouTube. Hardware Engine Bolt Sets Stud Hardware And Sets And if you’re a true…

…Kit Pn# Tbs-47239-Kit       View the entire stock of regulators.     Check out our YouTube channel for…

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

…from Mother’s but we prefer a more tried method that he learned from the old timers. Get your steel wool…

…cables as they apply to vintage British motorcycles. Guide to Cables: Throttle cables Factors to consider: cable anchor position throttle…

…and you’ll want one of these. This drift makes removing the main bearing race a snap and you won’t risk…

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

…talk about the Triumph top end. When we think of a typical air-cooled British vertical twin-cylinder motorcycle engine, I would…

…A revised Lucas 6CA contact breaker points ignition was introduced, allowing easier adjustability of the points and precision timing was…

…Costs of Losing the Right to Repair Legislation Carburetors Ignition Timing Adjustments Links Right to Repair Legislation Introduced On February…

‘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…

By Mike Grage, Technical and Customer Support at The Bonneville Shop and British Iron. Table of Contents Power Flow Potential…

…The 1970 Triumph TR6R Build Continues: Rotor and Stator Next in the series shows me checking the air gap of…

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

…domes. For 1968, a revised single carburetor intake manifold with the same bolt pattern as the twin carburetor manifolds debuted,…

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…

1964 Forks – Eliminating Oil Leaks By Dave Porter, Technical and Customer Support at The Bonneville Shop One topic that comes up…

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…

…the final iteration actually left the factory in August 1978, after the initial 1979 models were in production from HA11001,…

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

…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…