Triumph Speed Four

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Triumph Speed Four
Triumph Speed Four 2003.jpg
Manufacturer Triumph
Production 2002–2006
Predecessor Triumph TT600
Successor Street Triple
Class Naked bike
Engine 599 cc (36.6 cu in), liquid-cooled DOHC inline-4
Compression ratio 12.5:1
Top speed 135 mph (217 km/h)[1]
Power 62.4 kW (83.7 hp) @ 11,750 rpm[2]
Torque 54.9 N·m (40.5 lb·ft) @ 8000 rpm[2]
Transmission 6 speed, chain drive
Suspension Front: 43 mm cartridge forks with dual rate springs and adjustable preload, compression and rebound damping
Rear: Monoshock with adjustable preload, rebound and compression damping
Brakes Front: Twin 310 mm floating discs, 4 piston calipers
Rear: Single 220mm disc, single piston caliper
Tyres Front: 120/70 ZR 17
Rear: 180/55 ZR 17
Rake, trail 24°, 89.1 mm (3.51 in)
Wheelbase 1,394 mm (54.9 in)
Dimensions L: 2,060 mm (81 in)
W: 665 mm (26.2 in)
H: 1,150 mm (45 in)
Seat height 810 mm (32 in)
Weight 204 kg (449 lb)[2] (wet)
Fuel capacity 15 l (3.3 imp gal; 4.0 US gal)
Fuel consumption 5.7 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 headlghts 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.

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 2008-11-24. 
  4. ^ Road Test: Middleweight Test, Visordown 

External links[edit]