Triumph T120 Bonneville (1970-71)

The Triumph Bonneville 650 T120 was a motorcycle produced between 1970 and 1971. It was powered by a four-stroke, parallel twin, OHV engine, with a capacity of 649 cc or 39.6 cu in and had a compression ratio of 9.0:1. The cooling system was air-cooled and had 2 x 30 mm Amal concentric carburetors for induction, with battery-coil ignition and kick starting. The lighting system was a 12V alternator, and the oil system had a double plunger pump with dry sump and a capacity of 3.4 L or 7.2 US pt or 6 Imp pt. It had a multi-disc wet clutch, maximum power of 37.3 kW or 50 hp at 7,000 rpm, and a maximum torque of 52.1 Nm or 5.3 kgf-m or 38.5 lb-ft at 6,000 rpm.

The transmission was four-speed, and final drive was via chain. Gear ratios were 4th 4.95 / 3rd 6.14 / 2nd 8.36 / 1st 12.08. The front suspension was telescopic forks, while the rear suspension had a swinging arm with dual shocks. The brakes were drum, both front and rear. The front tyre was 3.25 -19, while the rear tyre was 4.00 -18. It had a fuel capacity of 16L or 4.2 US gal or 3.5 Imp gal, and had a wet weight of 181 kg or 399 lbs.

Technical specifications:

Make Model: Triumph Bonneville 650 T120