File:Flickr - ronsaunders47 - TRIUMPH BONNEVILLE. T120 .750 cc FOUR STROKE..jpg
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| Description |
Manufacturer United Kingdom Triumph Engineering Co Ltd Also called "Bonnie" Production 1959–1972 Engine 649 cc (39.6 cu in) air-cooled, ohv parallel-twin Power 46 bhp (34 kW) @ 6,700 rpm Transmission 4-speed gearbox with chain final drive Wheelbase 55 inches (1,400 mm)
The Bonneville T120 was Edward Turner's last production design at Triumph[2] (in retirement Turner designed the Triumph Bandit/BSA Fury which did not pass the prototype stage before BSA went under[3]). The new motorcycle was conceived and developed by Doug Hele[citation needed] and Brian Jones so quickly that it wasn't even included in the 1959 Triumph catalogue.[4] With a 649 cc (39.6 cu in) parallel-twin (two-cylinder) engine the T120 was based on the Triumph Tiger T110 and was fitted with the Tiger's optional twin 1 3/16 in Amal monobloc carburettors as standard, along with that model's high-performance inlet camshaft.[1] Launched in 1959 by Triumph as "The Best Motorcycle in the World", the Bonneville T120 was aimed mainly at the lucrative US market where enthusiasts were demanding extra performance.[5] Initially produced with a pre-unit construction engine which enabled the bike to achieve 115 mph (185 km/h) without further modification, the power tended to induce high speed wobbles from the single downtube frame,[1] so in 1963 a unit construction model was introduced which was stiffer and more compact, including additional bracing at the steering head and swinging arm.[1] The steering angle was altered and improved forks were fitted a couple of years later, which, together with the increased stiffness enabled overall performance to match that of the Bonneville's rivals.[6] Later T120 Bonnevilles used a new frame which contained the engine oil instead of using a separate tank; this became known as the oil in frame version. In 1968 the T120 gained a new and more reliable ignition system, but by 1972 competition from larger-capacity motorcycles led to the T120 being replaced by the 750 cc Bonneville T140. |
| Date | |
| Source | TRIUMPH BONNEVILLE. T120 .750 cc FOUR STROKE. |
| Author | Ronald Saunders from Warrington, UK |
| Camera location |  | View this and other nearby images on: OpenStreetMap |  |
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This image was originally posted to Flickr by ronsaunders47 at https://www.flickr.com/photos/46781500@N00/5117187140. It was reviewed on 26 October 2012 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-sa-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 03:19, 26 October 2012 | | 3,008 × 2,000 (1.99 MB) | Matanya (talk | contribs) | == {{int:filedesc}} == {{Information |Description=Manufacturer United Kingdom Triumph Engineering Co Ltd Also called "Bonnie" Production 1959–1972 Engine 649 cc (39.6 cu in) air-cooled, ohv parallel-twin Power 46 bhp (34 kW) @ 6,700 rpm Transmission ... |
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