Triumph Bonneville T120R Roadster 1963 - Specifications & Review

Article Complete Info
| Articleid | 438998 |
|---|---|
| Category | Sport |
| Make | Triumph |
| Model | Bonneville T120R Roadster |
| Year | 1963 |
Chassis, Suspension, Brakes & Wheels
| Frametype | Brazed lug, full-cradle, single downtube |
|---|---|
| Frontbrakes | Expanding brake (drum brake) |
| Frontbrakesdiameter | 203 mm (8.0 inches) |
| Frontsuspension | Telescopic fork, hydraulic damping. |
| Fronttyre | 3.25-18 |
| Rake | 26.0° |
| Rearbrakes | Expanding brake (drum brake) |
| Rearbrakesdiameter | 178 mm (7.0 inches) |
| Rearsuspension | Swing arm, 2 Girling dampers |
| Reartyre | 3.50-18 |
| Seat | Dual seat |
| Wheels | Wire spoked |
Engine & Transmission
| Borexstroke | 71.0 x 82.0 mm (2.8 x 3.2 inches) |
|---|---|
| Clutch | Multi-plate, wet |
| Compression | 8.5:1 |
| Coolingsystem | Air |
| Displacement | 649.00 ccm (39.60 cubic inches) |
| Enginedetails | Twin, four-stroke |
| Fuelsystem | Carburettor. Amal monobloc carburettor |
| Gearbox | 4-speed |
| Ignition | Lucas K2F auto-advance Magneto |
| Power | 46.00 HP (33.6 kW)) @ 6500 RPM |
| Topspeed | 185.0 km/h (115.0 mph) |
| Transmissiontypefinaldrive | Chain |
Other Specifications
| Coloroptions | Alaskan White |
|---|---|
| Electrical | Lucas RM19 alternator, 6-volt electrical system |
| Starter | Kick |
Physical Measures & Capacities
| Dryweight | 165.0 kg (363.8 pounds) |
|---|---|
| Fuelcapacity | 15.14 litres (4.00 gallons) |
| Groundclearance | 127 mm (5.0 inches) |
| Powerweightratio | 0.2788 HP/kg |
| Seatheight | 775 mm (30.5 inches) If adjustable, lowest setting. |
About Triumph Bonneville T120R Roadster 1963
The 1963 Triumph Bonneville T120R Roadster: A Legend on Two Wheels
The 1963 Triumph Bonneville T120R Roadster stands as a testament to the golden age of British motorcycling, offering a blend of style, performance, and heritage that continues to captivate enthusiasts today. Positioned within the sport category, the Bonneville T120R was designed to cater to riders seeking a thrilling yet accessible motorcycle experience. Its iconic design, characterized by the sleek lines and classic British aesthetic, makes it a sought-after model among collectors and classic bike aficionados alike.
At the heart of the Bonneville T120R lies a robust 649cc twin-cylinder, four-stroke engine that produces a commendable 46 horsepower at 6,500 RPM. This powerplant enables the motorcycle to reach a top speed of 115 mph (185 km/h), providing a rush of adrenaline for those who dare to twist the throttle. The engine's 8.5:1 compression ratio and the use of an Amal monobloc carburettor ensure that performance is both lively and reliable. The 4-speed gearbox and smooth chain final drive allow for precise gear changes, making it a joy to ride through twisting roads or urban landscapes. The overall riding experience is enhanced by the bike's lightweight design, tipping the scales at just 363.8 pounds (165 kg), which contributes to its agility and responsiveness.
The Triumph Bonneville T120R is not just about raw power; it also boasts a range of features that reflect its advanced engineering for the era. The brazed lug, full-cradle frame provides stability and durability, while the telescopic front fork with hydraulic damping and the swing arm rear suspension equipped with Girling dampers ensure a comfortable ride over varied terrains. The classic drum brakes, though a nod to tradition, maintain adequate stopping power, with an 8-inch front and 7-inch rear diameter for reliable performance. The bike’s 15.14-liter fuel tank offers good range for long rides, and the kick starter adds to its vintage charm. Available in the striking Alaskan White, the Bonneville exudes timeless elegance that commands attention wherever it goes.
#### Pros and Cons of the 1963 Triumph Bonneville T120R Roadster
Pros:
- Iconic Design: The Bonneville T120R's timeless aesthetics and classic British styling make it a standout on the road and a prized possession for collectors.
- Strong Performance: With 46 HP and a lightweight frame, this bike offers impressive speed and agility, perfect for spirited rides.
- Heritage and Community: Owning a Bonneville connects you to a rich history of motorcycling, along with a passionate community of enthusiasts and events.
Cons:
- Limited Braking Technology: The drum brakes, while adequate for their time, may feel less responsive compared to modern disc brakes, requiring more effort for stopping.
- Kick Starter Only: The absence of an electric start may be a drawback for some riders, especially in urban settings where convenience is key.
- Basic Suspension Setup: While the suspension is effective, it may not match the level of performance found in contemporary sport bikes, which can affect comfort on longer rides.
The 1963 Triumph Bonneville T120R Roadster is more than just a motorcycle; it is a slice of history that continues to inspire and excite riders across generations. Whether you’re a seasoned enthusiast or a newcomer to the world of classic bikes, the Bonneville promises an unforgettable riding experience filled with nostalgia and thrills.
