Classic and Classy Motorcycles Ltd

Historical Context

The 1971 Triumph T100C Tiger 500cc was part of Triumph’s long-running line of versatile middleweight twins. Based on the proven 500cc platform, the T100C was the off-road capable, high-pipe variant designed with the American market in mind. Originally introduced in the early 1960s, the T100C was lighter than the 650cc Bonneville and Tiger models, yet still delivered spirited performance and rugged reliability. The 1971 model was one of the last to use the traditional Triumph twin-loop frame before the shift to the oil-in-frame design in 1972, making it a favorite among purists and collectors alike.

Technical Specifications and Performance

• Year: 1971
• Make: Triumph
• Model: T100C Tiger
• Engine Displacement: 490cc
• Engine Type: Air-cooled OHV parallel twin
• Compression Ratio: 9.0:1
• Carburetion: Twin Amal concentric carburetors
• Ignition System: Points ignition
• Transmission Type: 4-speed manual
• Final Drive: Chain
• Cooling System: Air-cooled
• Fuel Capacity: Approx. 2.5 gallons
• Braking System: Drum front and rear
• Dry Weight: Approx. 355 lbs
• Top Speed: Around 90–95 mph

Technical Advancements

The T100C featured high-level twin exhausts for ground clearance, wider handlebars for off-road control, and a robust 500cc twin engine that was praised for its reliability and smoothness. The 1971 model retained the classic Triumph twin construction with unit engine/gearbox design, 12V electrics, and a traditional twin-shock rear end. While lacking modern conveniences, the T100C was highly serviceable and capable on both road and trail—a true dual-sport before the term became popular.

Evolution of the Model

The T100 series started in the pre-war years and became one of Triumph’s most successful middleweights. The T100C was aimed specifically at the U.S. market, where desert sleds and trail riding were growing in popularity. It shared its basic architecture with the T100R Daytona but offered more versatility and ruggedness. The 1971 model represents the final generation before Triumph introduced the taller and heavier oil-in-frame chassis, which changed the handling and aesthetics of the entire lineup.

Competitors in the Market

In 1971, the Triumph T100C competed with bikes like the BSA B50T, Yamaha DT1 250, and Honda CL350 Scrambler. While the Japanese bikes offered electric start and lighter frames, the Triumph had superior road manners, a more refined engine, and unmatched British style. Its twin-cylinder motor gave it an edge in open-road speed and torque, making it more versatile than many single-cylinder scramblers of the day.

Legacy and Appeal

As a barn find or project bike, the 1971 Triumph T100C is an ideal candidate. It’s light, simple to work on, and well-supported in the classic Triumph parts world. The model’s dual-purpose heritage, combined with its handsome looks and proven engineering, make it a favourite for both restorers and riders. Whether returned to stock form or turned into a period-correct scrambler or street tracker, the T100C delivers an engaging and rewarding vintage motorcycling experience.