Triumph T120 Bonneville (1968)

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.

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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