1968 Triumph Bonneville T120R Roadster. Picture credit Triumphmotorcycles.typepad.com.
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| General information |
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| Model | Triumph Bonneville T120R Roadster |
| Year | 1968 |
| Category | Sport |
| Rating | 3.6 Check out the detailed rating of racing track capabilities, engine performance, accident risk, etc. Compare with any other bike. |
| Engine and transmission |
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| Displacement | 649.0 ccm (39.60 cubic inches) |
| Engine type | Twin, four-stroke |
| Power | 46.0 HP (33.6 kW)) @ 6500 RPM |
| Top speed | 185.0 km/h (115.0 mph) |
| Compression | 9.0:1 |
| Bore x stroke | 71.0 x 82.0 mm (2.8 x 3.2 inches) |
| Fuel system | Carburettor. Amal Concentric carburettor |
| Fuel control | Overhead Valves (OHV) |
| Ignition | Lucas |
| Cooling system | Air |
| Gearbox | 4-speed |
| Transmission type | Chain (final drive) |
| Clutch | Multi-plate, wet |
| Chassis, suspension, brakes and wheels |
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| Frame type | Brazed lug, full-cradle, single downtube |
| Rake (fork angle) | 26.0° |
| Front suspension | Telescopic fork, hydraulic damping. |
| Rear suspension | Swing arm, 2 Girling dampers |
| Front tire | 3.25-19 |
| Rear tire | 4.00-18 |
| Front brakes | Expanding brake (drum brake). Twin Leading Shoe |
| Diameter | 203 mm (8.0 inches) |
| Rear brakes | Expanding brake (drum brake) |
| Diameter | 178 mm (7.0 inches) |
| Wheels | Wire spoked. Dunlop tyres. |
| Seat | Dual seat, black and gray |
| Physical measures and capacities |
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| Dry weight | 165.0 kg (363.8 pounds) |
| Power/weight ratio | 0.2788 HP/kg |
| Seat height | 775 mm (30.5 inches) If adjustable, lowest setting. |
| Ground clearance | 127 mm (5.0 inches) |
| Wheelbase | 1403 mm (55.2 inches) |
| Fuel capacity | 9.46 litres (2.50 US gallons) |
| Other specifications |
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| Color options | Red |
| Starter | Kick |
| Instruments | Smiths Magnetic gauges |
| Electrical | 12-volt electrical system |
| Update specs | Report missing specs or required updates. |
| Further information |
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| Maintenance | Find parts, fluids. filters, maintenance tools and service manuals at Amazon.com. |
| Ask questions | Join the 68 Triumph Bonneville T120R Roadster 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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Reliability for the 1968 Triumph Bonneville T120R Roadster:
 (65.1 out of 100)
Click here for complete rating. You can also compare bikes.
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