Triumph Speed Four

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Triumph Speed Four
PredecessorTriumph TT600
SuccessorStreet Triple
ClassNaked bike
Engine599 cc (36.6 cu in), liquid-cooled DOHC inline-4
Compression ratio12.5:1
Top speed135 mph (217 km/h)[1]
Power73 kW (98 hp) @ 11,750 rpm[2]
Torque56 N⋅m (41 lb⋅ft) @ 8000 rpm[2]
Transmission6 speed, chain drive
SuspensionFront: 43 mm cartridge forks with dual rate springs and adjustable preload, compression and rebound damping
Rear: Monoshock with adjustable preload, rebound and compression damping
BrakesFront: Twin 310 mm floating discs, 4 piston calipers
Rear: Single 220mm disc, single piston caliper
TyresFront: 120/70 ZR 17
Rear: 180/55 ZR 17
Rake, trail24°, 89.1 mm (3.51 in)
Wheelbase1,394 mm (54.9 in)
DimensionsL: 2,060 mm (81 in)
W: 665 mm (26.2 in)
H: 1,150 mm (45 in)
Seat height810 mm (32 in)
Weight204 kg (449 lb)[2] (wet)
Fuel capacity18 L (4.0 imp gal; 4.8 US gal)
Fuel consumption5.7 L/100 km; 49 mpg‑imp (41 mpg‑US)[2]

The Triumph Speed Four is a standard or streetfighter motorcycle made by Triumph from 2002 to 2006 as the naked, or non-faired brother of the TT600 sport bike introduced in 1999.


The Speed Four has similar twin round headlights to the Speed Triple, but a different frame and engine. The Speed Four has the clip-on handlebars of the TT600, rather than the motocross-inspired handlebars of the Speed Triple and other streetfighters.

The Speed Four is mechanically similar to its predecessor, the TT600, with the exceptions of the cam profiles, ignition and fuel injection mapping, front spring rate, and other minor concessions to its streetfighter style; the frame and fully adjustable suspension are race-ready.

The engine is a 599 cc inline-four-cylinder engine, as used in the TT600. The bike has a top speed of 135 mph (217 km/h) and a 0–60 mph (0–97 km/h) time of 4.5 seconds.[1] Motorcyclist tested the 2002 Speed Four's 0 to 14 mile (0.00 to 0.40 km) time at 11.65 seconds @ 114.9 mph (184.9 km/h) and 0 to 60 miles per hour (0 to 97 km/h) time at 3.71 seconds.[2]


The Speed Four was voted No.1 for handling and suspension in Ride magazine's 2008 Rider Power Survey.[3] The Triumph Daytona 675 was second in the same category.

Productions Totals[edit]

Triumph UK After Sales has confirmed that 4,606 Speed Fours were produced from 2002 through 2006. Of those 1,011 were produced for the US market with a further 54 for Canada.

See also[edit]

This motorcycle has been compared to the following:[4]


  1. ^ a b Visordown: Triumph Speed Four Specification
  2. ^ a b c d e "Triumph speed four: undressed for success. (Road Test)", Motorcyclist, pp. 57+ – via General OneFile (subscription required) , December 2002
  3. ^ "RiDER Power: The world's best handling motorcycles aren't sportsbikes". Motorcycle News. Retrieved 24 November 2008.
  4. ^ Road Test: Middleweight Test, Visordown

External links[edit]