Triumph Bonneville T120R Roadster: history, specs, pictures

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Triumph Bonneville T120R Roadster
Manufacturer
Production 1963 - 1969
Engine
twin, four-stroke
Bore / Stroke 71.0mm x 82.0mm
Top Speed 115 mph (185 km/h)
Horsepower 48.01 HP (35.8 KW) @ 6200RPM
Fuel System carburetor. amal concentric carburetor
Ignition lucas
Transmission Gear box: 4-speed

Final Drive: chain

Clutch: multi-plate, wet
Suspension Front: telescopic fork, hydraulic damping.
Rear: swing arm, 2 girling dampers
Brakes Front: expanding brake (drum brake). twin leading shoe
Rear: expanding brake (drum brake)
Front Tire 3.25-19
Rear Tire 4.00-18
Wheelbase 55.24 inches (1403 mm)
Seat Height 30.51 inches (775 mm)
Weight 363.76 pounds (165.0 Kg) (dry),
Fuel Capacity 2.5 Gallon (9.46 Liters)
Manuals Service Manual


The Triumph Bonneville T120R Roadster was a twin, four-stroke standard produced by Triumph between 1963 and 1969. It could reach a top speed of 115 mph (185 km/h). Claimed horsepower was 48.01 HP (35.8 KW) @ 6200 RPM.

Engine[edit | edit source]

The engine was a air cooled twin, four-stroke. A 71.0mm bore x 82.0mm stroke result in a displacement of just 649.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).

Drive[edit | edit source]

The bike has a 4-speed transmission. Power was moderated via the multi-plate, wet.

Chassis[edit | edit source]

It came with a 3.25-19 front tire and a 4.00-18 rear tire. Stopping was achieved via expanding brake (drum brake). twin leading shoe in the front and a expanding brake (drum brake) in the rear. The front suspension was a telescopic fork, hydraulic damping. while the rear was equipped with a swing arm, 2 girling dampers. The Bonneville T120R Roadster was fitted with a 2.5 Gallon (9.46 Liters) fuel tank. The bike weighed just 363.76 pounds (165.0 Kg). The wheelbase was 55.24 inches (1403 mm) long.