The Triumph T120R Bonneville 650 is a four-stroke, parallel-twin, OHV motorcycle manufactured in the year 1968. The engine capacity is 649cc and has a bore x stroke of 71 x 82mm with a compression ratio of 8.5:1. The bike is air-cooled with two Amal 1-1/6″ carburetors for induction and kick start for ignition. It can reach a maximum power of 34 kW / 46 hp at 6500 rpm with a wet, multiplate clutch and a 4-speed constant mesh transmission. The bike has a single front down tube frame with second bracing member running under the tank, a 65o steering angle and telescopic forks for the front suspension and swingarm with twin Girling dampers for the rear. It has an 8″ SLS drum front brake, a 7″ SLS drum rear brake, and a 3.25 x 19 Dunlop Universal front tire and a 4.00 x 18 Dunlop Universal rear tire. The bike is 2020mm long, 720mm wide, has a wheelbase of 1403mm, seat height of 775mm with a ground clearance of 127mm, and weighs 165kg. The fuel capacity of the bike is 13.6 Litres / 3.6 US gal for US export and 18 Litres / 4.8 US gal for other exports.
Technical specifications:
Make Model: Triumph T120R Bonneville 650
| Year | 1968 |
|---|---|
| Engine | Four stroke, parallel twin, OHV |
| Capacity | 649 cc / 39.6 cu in |
| Bore x Stroke | 71 x 82 mm |
| Compression Ratio | 8.5:1 |
| Cooling System | Air cooled |
| Induction | 2 x Amal 1 – 1/6″ carburetors |
| Ignition | Lucas MA6 alternator with 2 coils |
| Starting | Kick |
| Max Power | 34 kW / 46 hp @ 6500 rpm |
| Clutch | Wet, multiplate |
| Transmission | 4 Speed, constant mesh |
| Final Drive | Chain, 106 links |
| Gear Ratios | 1st 11.80 / 2nd 8.17 / 3rd 6.76 / 4th 5.84:1 |
| Frame | Single front downtube, second bracing member running under tank |
| Steering Angle | 65o |
| Front Suspension | Telescopic forks, hydraulic damping |
| Rear Suspension | Swingarm, twin Girling dampers |
| Front Brakes | 8″ SLS drum |
| Rear Brakes | 7″ SLS drum |
| Front Tyre | 3.25 x 19, Dunlop Universal |
| Rear Tyre | 4.00 x 18, Dunlop Universal |
| Dimensions | Length 2020 mm / 85.5 in Width 720 mm / 28.5 in |
| Wheelbase | 1403 mm / 55.2 in |
| Seat Height | 775 mm / 30.5 in |
| Ground Clearance | 127 mm / 5.0 in |
| Dry Weight | 165 kg / 363 lbs |
| Fuel Capacity | US: 13.6 Litres / 3.6 US gal other Export: 18 Litres / 4.8 US gal |
