Triumph Bonneville T120R Roadster 1964 - Specifications & Review

Bonneville T120R Roadster

Article Complete Info

Articleid99318
CategorySport
MakeTriumph
ModelBonneville T120R Roadster
Year1964

Chassis, Suspension, Brakes & Wheels

FrametypeBrazed lug, full-cradle, single downtube
FrontbrakesExpanding brake (drum brake)
Frontbrakesdiameter203 mm (8.0 inches)
FrontsuspensionTelescopic fork, hydraulic damping.
Fronttyre3.25-19
Rake26.0°
RearbrakesExpanding brake (drum brake)
Rearbrakesdiameter178 mm (7.0 inches)
RearsuspensionSwing arm, 2 Girling dampers
Reartyre4.00-18
SeatDual seat
WheelsWire spoked

Engine & Transmission

Borexstroke71.0 x 82.0 mm (2.8 x 3.2 inches)
ClutchMulti-plate, wet
Compression8.5:1
CoolingsystemAir
Displacement649.00 ccm (39.60 cubic inches)
EnginedetailsTwin, four-stroke
FuelsystemCarburettor. Amal monobloc carburettor
Gearbox4-speed
IgnitionLucas K2F auto-advance Magneto
Power46.00 HP (33.6 kW)) @ 6500 RPM
Topspeed185.0 km/h (115.0 mph)
TransmissiontypefinaldriveChain

Other Specifications

ColoroptionsGold/Alaskan White
ElectricalLucas RM19 alternator, 6-volt electrical system
InstrumentsSmiths Magnetic gauges
StarterKick

Physical Measures & Capacities

Dryweight165.0 kg (363.8 pounds)
Fuelcapacity15.14 litres (4.00 gallons)
Groundclearance127 mm (5.0 inches)
Powerweightratio0.2788 HP/kg
Seatheight775 mm (30.5 inches) If adjustable, lowest setting.

About Triumph Bonneville T120R Roadster 1964

The 1964 Triumph Bonneville T120R Roadster is a quintessential symbol of British motorcycling that seamlessly blends vintage charm with spirited performance. Positioned in the sport category, this motorcycle epitomizes the golden age of two-wheeled engineering, appealing to both keen enthusiasts and collectors alike. With its classic lines and iconic design, the Bonneville T120R captures the essence of freedom on the open road, making it a coveted piece of history that continues to turn heads today.

At the heart of the Bonneville T120R lies a robust 649cc twin-cylinder, four-stroke engine that delivers an exhilarating 46 horsepower at 6,500 RPM. Capable of reaching a top speed of 115 mph, this motorcycle promises a thrilling ride whether you're cruising down the highway or navigating winding backroads. The engine is paired with a 4-speed gearbox that ensures smooth power delivery, while the air-cooled configuration and Lucas K2F auto-advance magneto ignition system further enhance reliability and performance. Riders will appreciate the engaging throttle response and the unmistakable roar of the twin exhaust as they unleash the full potential of this classic machine.

The Bonneville T120R is equipped with a variety of features that showcase its engineering prowess and attention to detail. The robust brazed lug, full-cradle frame provides excellent stability, while the telescopic front forks and swingarm rear suspension with Girling dampers contribute to a comfortable ride over various terrains. Stopping power is managed by dual drum brakes—203 mm in the front and 178 mm in the rear—ensuring dependable control during spirited riding. With a fuel capacity of 4 gallons, riders can confidently embark on longer journeys, knowing they can cover considerable distance before needing to refuel. The motorcycle's stylish color options of Gold and Alaskan White enhance its vintage appeal, making every ride a statement.

PROs:

  1. Classic Styling: The Bonneville T120R features timeless design elements that attract vintage motorcycle enthusiasts and collectors.
  2. Engaging Performance: With its powerful twin-engine and responsive handling, the motorcycle offers an exhilarating riding experience.
  3. Comfortable Ride: The well-engineered suspension system provides a smooth ride, making it suitable for longer journeys.

CONs:

  1. Weight: At 365 pounds, this motorcycle may be cumbersome for some riders, especially in tight maneuvering situations.
  2. Braking System: Although reliable, the drum brakes may not offer the same stopping power or responsiveness as modern disc brakes.
  3. Kick Start Only: The absence of an electric starter may deter some riders, especially those used to modern conveniences.

In essence, the 1964 Triumph Bonneville T120R Roadster is not just a motorcycle; it's a piece of history that offers a unique blend of performance, style, and nostalgia. Whether you are a seasoned rider or a collector, this classic creation captures the spirit of adventure and the joy of motorcycling in its purest form.

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