Electronic Ignition System Diagnostics

By Mike Grage, Customer and Technical Support at The Bonneville Shop Here at The Bonneville Shop we walk people through electronic ignition diagnostics on a regular basis, after all there are very few professional shops willing to work on a motorcycle more than 10 years old.  Since anything electrical can be controversial I want to give the reader a brief overview of my background and qualifications before I get into…

Triumph Service Bulletin 64/1 – 1964 Forks – Eliminating Oil Leaks

1964 Forks – Eliminating Oil Leaks By David Porter, Customer and Technical Support at The Bonneville Shop One topic that comes up occasionally when discussing the early unit-construction Triumph B and C-range telescopic forks is the fork oil seal holders, or “dust excluder sleeve nuts”, as termed in the Triumph parts catalogs. The new external spring forks introduced on the 1964 models replaced the internal spring forks, as used on…

Tri-Spark Triples Ignition Kit Installation Guide

TECH TIPS Tri-Spark Triples Ignition Kit Installation Guide By Mike Grage, Customer and Technical Support at The Bonneville Shop So, you bought a TBS-0002 Classic Triple Electronic Ignition kit and you’re having a tough time wiring it up and/or setting the timing. Well don’t worry, I got your back. This ignition system is a little different, but in a good way. This is the ignition system I will use if…

Tips on Fitting the Girling Stainless Floating Brake Disc Rotor

     We have recently taken delivery and sold through our initial shipment of Girling’s new 37-4275G Stainless Floating Brake Disc Rotor. The reception in the marketplace has been favorable and the increased performance characteristics of the nearly 2 lbs. of rotational weight savings have been reported on various social media sites and forums. The beefy 6mm thick stainless steel rotor allows the drilling pattern and cooling slots to contribute…

Thunderbolts and Lightning: BSA Motorbikes

Thunderbolts and Lightning, very, very frightening me! (Galileo) Galileo (Galileo) Galileo… By David Porter, Customer and Technical Support at The Bonneville Shop When discussing the history of the British motorcycle industry and some of the most famous marques, like Ariel, BSA, Norton, and Triumph, you won’t get very far into the discussion without mentioning names like Val Page, Edward Turner, Bert Hopwood, Doug Hele, and others who were all contemporaries during…

TECH TIPS – Evaluating Your Clutch Plates and Springs

TECH TIPS Evaluating Your Clutch Plates and Springs By David Porter, Customer and Technical Support at The Bonneville Shop When evaluating the clutch plates, clean and inspect the clutch plates for obvious signs of damage or wear. When the inner tabs on the plain steel driven plates are showing burrs, they will fit on the clutch center splines loosely, and will contribute to premature wear to the clutch center, leading…

What exactly is a 1978 Triumph Bonneville?

What Exactly is a 1978 Triumph Bonneville? By David Porter, Customer and Technical Support at The Bonneville Shop    As any experienced Triumph parts expert will tell you, the 1978 model year presents some challenges when making recommendations for suitable replacement parts for the T140 models. To help understand why this is, a historical account of events leading up to the manufacture of the 1978 Bonneville is in order. When the…

Using the Degree Wheel to Establish Ignition Timing

Using the Degree Wheel to Establish Ignition Timing By David Porter, Customer and Technical Support at The Bonneville Shop      You have finally decided to convert your 1967 Triumph Bonneville to electronic ignition. The instructions tell you to remove the points plate and mechanical advance unit. Not to worry, once the old ignition parts are out of the way, you can start retrofitting your new modern ignition. Once the…

The Brain of Your Triumph B Range Engine- the Camshaft

Have you seen our blog on Cam Timing Notes? Dave has written up a companion history of the Camshaft.   The Brain of Your Triumph B Range Engine- the Camshaft By David Porter, Customer and Technical Support at The Bonneville Shop      This overview of the camshafts and their function in the Triumph 650 and 750 engines is intended to help familiarize the engine builder with the evolution and applications…

A Brief Synopsis of the Lucas Console Switchgear and it’s Evolution

By David Porter, Customer and Technical Support at The Bonneville Shop During the late 1960s, the BSA Group was busy developing the next generation of Triumph and BSA motorcycles at a leased 17th-century mansion in Warwickshire, known as Umberslade Hall. Situated nearly equidistant from Redditch, Small Heath, and Meriden, the research and development facility was the epicenter for the design teams to update both ranges to the modern specifications needed…