| General information |
|---|
| Model | Triumph T120 Bonneville |
| Year | 1959 |
| Category | Sport |
| Rating | 3.2 Check out the detailed rating of racing track capabilities, engine performance, accident risk, etc. Compare with any other bike. |
| Engine and transmission |
|---|
| Displacement | 649.0 ccm (39.60 cubic inches) |
| Engine type | Twin, four-stroke |
| Power | 46.0 HP (33.6 kW)) @ 6700 RPM |
| Top speed | 185.0 km/h (115.0 mph) |
| Bore x stroke | 71.0 x 82.0 mm (2.8 x 3.2 inches) |
| Fuel system | Carburettor. Amal monobloc carburettor |
| Fuel control | Overhead Valves (OHV) |
| Ignition | Lucas magneto |
| Cooling system | Air |
| Gearbox | 4-speed |
| Transmission type | Chain (final drive) |
| Clutch | Multi-plate, wet |
| Chassis, suspension, brakes and wheels |
|---|
| Frame type | Brazed lug, rigid |
| Front suspension | Telescopic fork. |
| Rear suspension | Twin shocks. Girlings 100 lb/ft spring tension, adjustable pre-set. |
| Front tire | 3.25-19 |
| Rear tire | 3.50-19 |
| Front brakes | Expanding brake (drum brake) |
| Diameter | 203 mm (8.0 inches) |
| Rear brakes | Expanding brake (drum brake) |
| Diameter | 178 mm (7.0 inches) |
| Seat | Dual seat |
| Physical measures and capacities |
|---|
| Dry weight | 183.0 kg (403.4 pounds) |
| Power/weight ratio | 0.2514 HP/kg |
| Seat height | 770 mm (30.3 inches) If adjustable, lowest setting. |
| Ground clearance | 127 mm (5.0 inches) |
| Wheelbase | 1400 mm (55.1 inches) |
| Fuel capacity | 15.14 litres (4.00 US gallons) |
| Other specifications |
|---|
| Color options | Pearl Grey/Tangerine Orange |
| Update specs | Report missing specs or required updates. |
| Further information |
|---|
| Maintenance | Find parts, fluids. filters, maintenance tools and service manuals at Amazon.com. |
| Ask questions | Join the 59 Triumph T120 Bonneville discussion group or the general Triumph discussion group. |
| Related bikes | List related bikes for comparison of specs. |
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Rating sample for this Triumph bike
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Fun-factor for the 1959 Triumph T120 Bonneville:
 (82.3 out of 100)
Click here for complete rating. You can also compare bikes.
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