Triumph Daytona 675

Triumph Daytona 675 development started in 2000 following the launch of the TT600. The TT600 represented Triumph's first modern foray into the middle weight sports motorcycle market. A decision was made to manufacture a machine closer aligned with traditional Triumph values. A notable technical decision was the selection of a three cylinder engine as the power plant, instead of the four cylinder used by the TT600 and the other 600 cc supersport motorcycles.

In 2001, soon after the completion of the similarly three cylinder powered Triumph Daytona 955i, Triumph began engineering analysis to work out weight, engine performance in horsepower and torque. Pleased with the figures, the project moved to the full concept phase in March 2002.

Triumph Daytona 675 in Tornado RedInitial chassis development work was done using a chopped Daytona 600 chassis. Triumph moved the wheelbase, adjusted the head angle, and modified the tank. This new configuration exhibited better performance than the original Daytona 600, forming a basis to compare against competitive bikes such as the Kawasaki Ninja ZX-6R and Honda CBR600RR. While engine development had not been completed, computer aided chassis development continued with the data collected from these tests.

Design work for the Daytona 675 proceeded, producing a primarily black design based on the Daytona 600. However, this initial design was discarded as great British designs of the 1960s had "a flowing curved design - no sharp angular aggressive edges". A member of the engineering team produced a concept drawing of the 675 as a naked bike. Styling was based upon this concept drawing and that of the earlier T595 model. Styling development continued in house, staying close to spirit of earlier Triumph design. Market research groups made up of a variety of different classes of sportbike riders choose the latter design of bike which was refined and adopted for production.