Triumph Triple

The Triumph Triples are a family of modern DOHC inline three-cylinder motorcycle engines made from 1990 onwards by the Triumph Motorcycle Company at their Hinckley, Leicestershire factory. The inspiration for the later triples was the pushrod Triumph Trident, produced from 1968 to 1974 at the Triumph factory at Meriden Works.

The Triumph Triple motorcycle engine has been used in the Trident, Thunderbird, Adventurer, Legend, Tiger, Speed Triple, Sprint ST & RS, Sprint Executive, Trophy, Street Triple, and Daytona models. Bike magazine ranked the Hinckley Triumph Triple as the 10th best motorcycle engine of all time.

The first generation motor from the reborn Triumph company in 1989 was available as an inline 3-cylinder carburetted 4-stroke of either 748 cc (45.6 cu in) called "750", or 885 cc called "900". The primary difference between the two engines was the stroke. The shorter stroke, higher revving 750 used a bore/stroke of 76.0 x 55.0 mm while the 900 used a longer stroke of 65.0 mm. The 750 engine with its eager revving performance was initially believed to be the finer machine, but the longer-legged 900 proved more popular. As a result the smaller 750 became a budget model and was eventually phased out. Both the 750 and 900 were sold as roadsters called "Tridents". The Sprint 900, a sport tourer with a cockpit fairing, joined the Trident range.

The first variation on the 900 triple theme appeared in 1992 with the Tiger 900. This made use of softer cam profiles to produce a less powerful engine but with an even broader spread of torque. Further changes appeared a few years later with the Daytona Super III. This time Triumph collaborated with the tuning gurus at Cosworth to produce the first high performance variant of the triple. Using higher compression pistons and a redesigned cylinder head claimed power was increased from 97 bhp (72 kW) to 115 bhp (86 kW).

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