Classic and Classy Motorcycles Ltd

Historical Context
The 1978 Triumph 750cc T140E Bonneville stands as a testament to Triumph's enduring legacy in the motorcycle world. Introduced during a period of significant change and competition from abroad, the T140E Bonneville was Triumph's answer to the evolving demands of riders seeking performance, reliability, and an iconic design. This model continued the illustrious Bonneville lineage, known for its racing heritage and as a symbol of motorcycle culture.

Technical Specifications and Performance

• Year: 1978

• Make: Triumph

• Model: T140E Bonneville

• Engine displacement: 750cc

• Engine type: Air-cooled, four-stroke, parallel-twin

• Compression ratio: 7.9:1

• Carburetion: Twin Amal MkII carburetors

• Ignition system: Electronic ignition, a notable upgrade for reliability

• Cooling system: Air-cooled

• Fuel capacity: 3.8 US gallons

• Wheelbase: 58 inches

• Horsepower: 50 bhp @ 6200 rpm

• Torque: 44 lb-ft @ 3700 rpm

• Transmission type: 5-speed manual

• Frame type: Steel, incorporating oil in frame (OIF) technology

• Suspension system: Telescopic forks (front), Twin shock absorbers (rear)

• Braking system: Disc brakes, front and rear, an improvement over previous models

• Dry Weight: Approximately 430 lbs

• Top speed: Approximately 110 mph

• Acceleration: 0-60 mph in about 6.5 seconds

Technical Advancements
The T140E introduced several advancements over its predecessors, including the adoption of electronic ignition and improved carburetors for better performance and reliability. The model also featured enhanced braking capabilities with disc brakes on both front and rear, marking a significant improvement in rider safety and control.

Evolution of the Model
Triumph's T140E Bonneville was part of the continuous evolution of the Bonneville series, showcasing Triumph's commitment to innovation while preserving the distinctive style and spirit of the original Bonnevilles. This model encapsulated the balance between classic appeal and modern engineering, making it a prime candidate for restoration and customization projects.

Cultural Impact
The 1978 T140E Bonneville not only captured the imagination of riders for its performance and design but also for its potential as a canvas for personal expression. Projects involving the T140E often seek to enhance its classic lines with modern touches or fully restore it to its original glory, reflecting the deep connection between the Bonneville and the culture of motorcycle customization.

Racing Heritage
While the T140E was designed with the road in mind, the Bonneville's racing heritage is undeniable. Enthusiasts and builders frequently draw on this legacy, tuning and modifying the T140E for vintage racing or as a tribute to Triumph's competition history.

Competitors
In the late 1970s, the Triumph Bonneville T140E faced stiff competition from faster, more advanced models from Japanese manufacturers. However, its unique blend of style, character, and performance ensured that it remained a beloved choice among riders who valued tradition and the distinctive feel of a British twin.