Triumph Bonneville 650 T120R

 

 

 

Make Model.

Triumph T120R Bonneville 650

Year

1969 - 69

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 L / 3.6 US gal / 3 Imp gal / UK and other Export: 18 L / 4.8 US gal / 4 Imp gal

In 1937 Triumph announced a new bike that took the world by storm. Designed by the famed Edward Turner, the 500cc vertical-twinTriumph Speed Twin was so successful that it set a fashion that was quickly followed by all the other major British manufacturers.

Grand Prix Victory
In 1940 during World War 11, the Triumph factory in Coventry was blitzed. Production shifted to a new factory at Meriden, the geographical center of England, where military engines with silicon-aluminum cylinder and head based on the Speed Twin were built Postwar, a Tiger 100 vertical twin with this design won the 1946 Manx Grand Prix. By 1949, British bikes were becoming popular in the United States, and a special American-market Triumph twin, the 650cc Thunderbird, went into production. Triumph became part of the BSA group in 1951.

World Speed Record Breaker
The Triumph twin enjoyed remarkable sport in success and set world speed records on the Bonneville Salt Flats in Utah. In 1955, Triumph power set a speed record of 193 mph and in 1962 raised the record to almost 225-mph. Though the record-breaker was a cigar-shaped projectile on two wheels, from then on Triumph named all of its twin-carburetor sports bikes "Bonneville" to commemorate the event. The BSA group collapsed in 1973 and Triumph merged with Norton-Villiers.

Source bikerenews.com

1969