2018 Triumph Street Twin

A unit construction model was introduced which was stiffer and more compact, including additional bracing at the steering head and swing arm. The steering angle was altered and improved forks were fitted a couple of years later, which, together with the increased stiffness enabled overall performanc…

And continues to the present as a completely new design that strongly resembles the original series. The name Bonneville derives from the famous Bonneville Salt Flats, Utah, USA, where Triumph and others attempted to break the motorcycle speed records.

Except on the Speedmaster, SE and T100.

Triumph launched the "Sixty-8" line of Bonneville accessories, offering vintage and modern-style items including seats, seat covers, cam covers, sprocket covers, petrol tank covers, tank badges, panniers, and other items to allow Bonneville owners the opportunity to customise their bikes for conside…

On, all Bonnevilles received the 865 cc engine. Through 2007, all engines had carburettors; electronic fuel injection (EFI) was then introduced to the 2008 models in Britain and to United States models in the 2009 model year, in both cases to comply with increasingly stringent emissions requirements…

All Bonnevilles received a slightly larger and reshaped tank to accommodate the EFI pump, but the tank capacity was not altered. Even though US 2008 models were not injected they still received the larger tank, therefore the space for the pump was not used. Rendered many of these accessories obsolete, since tank covers, tank badges etc. would not fit the redesigned tank. The original T120 Bonneville was a speed-orientated motorcycle, but the new Bonnevilles are softer and aimed at the roadster market. All models received a bigger reshaped tank (see above). Bonneville SE: Introduced 2009.

The baseline model gained cast alloy wheels, tank badge in decal form, black engine covers and up-swept megaphone exhaust silencers Bonneville Black: 2004 to 2008. Variation on baseline model with black paint and introducing the black engine covers subsequently used across the family

Triumph introduced an all new T120 1200cc 270° liquid-cooled, SOHC, version of the Bonneville, then

A T100 900cc version.