Triumph T 120 Bonneville (1959-60)

Make Model: Triumph T120 Bonneville 650


Year: 1959 – 60
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 magneto
Starting: Kick
Max Power: 34 kW / 46 hp @ 6700 rpm
Clutch: Wet, multiplate
Transmission: 4 Speed, constant mesh
Final Drive: Chain, 101 links
Gear Ratios: 1st 11.90 / 2nd 8.25 / 3rd 5.81 / 4th 4.88:1
Frame: Twin steel downtubes
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
Rear Tyre: 4.00 x 18, Dunlop

Wheelbase: 1400 mm / 55.25 in
Seat Height: 770 mm / 30.5 in
Ground Clearance: 127 mm / 5.0 in
Dry Weight: 183 kg / 403 lbs
Fuel Capacity: US: 13.6 L / 3.6 US gal / 3 Imp gal / UK and other Export: 18 L / 4.8 US gal / 4 Imp gal


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