Naked Motorcycles
2003Triumph Speed Four
32 fields on record
The 2003 Triumph Speed Four is a middleweight naked bike designed for riders seeking accessible performance and everyday practicality. Its 599cc four-cylinder engine delivers responsive power with a 6-speed transmission, making it ideal for commuting and spirited riding. Known for combining classic British styling with modern reliability, the Speed Four appeals to both new riders and experienced enthusiasts seeking versatility.
- Capacity
- 599.0 ccm
- Engine
- In-line four, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 170.0 kg
- Seat height
- 810 mm
- Power
- 98.0 HP (72.1 kW) @ 11750 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built for spirited road riding and canyon carving, blending a screaming supersport-derived engine with an upright naked-bike stance.
- Built for
- A fiery, revvy little naked bike that loves being thrashed near redline and rewards aggressive, playful riding.
- Not ideal for
- Not ideal for riders seeking long-distance comfort, passenger-friendly touring, or off-road capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 599.0 ccm
- Power
- 98.0 HP (72.1 kW) @ 11750 RPM
- Torque
- 68.0 Nm (6.9 kgf-m)
- Engine type
- In-line four, four-stroke
- Power/weight ratio
- 0.5765 HP/kg (dry)
- Bore x stroke
- 68.0 x 41.3 mm
- Compression
- 12.5:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Ignition
- Digital - inductive type - via electronic engine management system
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet, multi-plate
Dimensions & weight
- Wheelbase
- 1395 mm
- Overall length
- 2060 mm
- Overall width
- 690 mm
- Overall height
- 1150 mm
- Seat height
- 810 mm
- Dry weight
- 170.0 kg
- Fuel capacity
- 18.00 litres
Chassis & suspension
- Frame
- Aluminium beam perimeter
- Front suspension
- 43mm forks with dual rate springs and adjustable preload, compression and rebound damping
- Rear suspension
- Monoshock with adjustable preload, rebound and compression damping
- Rake (fork angle)
- 24.6°
Brakes & wheels
- Front brakes
- Double disc
- Front brakes diameter
- 310 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 220 mm
- Front tyre
- 120/70-ZR17
- Rear tyre
- 180/55-ZR17
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2003 | 2004 | 2005 | 2006 |
|---|---|---|---|---|
| Capacity | 599 cc | 599 cc | 599 cc | 599 cc |
| Dry weight | 170 kg | 170 kg | 170 kg | 170 kg |
| Seat height | 810 mm | 810 mm | 810 mm | 810 mm |
| Fuel capacity | 18 L | 18 L | 16.6 L | 16.6 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Safety Recalls
⚠ 1 recall may applyFUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGSApr 2004 · 04V156000
ON CERTAIN MOTORCYCLES, THE FUEL CONNECTOR LINKING EACH OF THE FEED AND RETURN FUEL HOSES TO THE FUEL PUMP MOUNTING PLATE MAY FRACTURE FOLLOWING IN-SERVICE HANDLING.
Risk: FUEL COULD ESCAPE FROM THE FRACTURED BODY OF THE CONNECTOR ONTO THE ENGINE OR SIDE OF THE BIKE. FUEL LEAKAGE, IN THE PRESENCE OF AN IGNITION SOURCE, CAN RESULT IN A FIRE.
Remedy: DEALERS WILL REPLACE THE CONNECTOR. THE RECALL BEGAN ON JULY 30, 2004. OWNERS SHOULD CONTACT TRIUMPH AT 1-678-854-2010.
These recalls cover some 2003 bikes of this model. Whether one applies to a specific bike, and whether the repair has already been done, depends on its VIN — check your VIN with NHTSA or ask a dealer.
Source: NHTSA. View all Triumph recalls →
Rider Reviews
Common questions
What is the engine size of the Triumph Speed Four?
The 2003 Triumph Speed Four has a Capacity of 599.0 ccm (36.55 cubic inches).
What engine power does the Triumph Speed Four have?
The 2003 Triumph Speed Four has a Power of 98.0 HP (72.1 kW) @ 11750 RPM.
How many gears does the Triumph Speed Four have?
The 2003 Triumph Speed Four has a Gearbox of 6-speed.
What is the torque of the Triumph Speed Four?
The 2003 Triumph Speed Four has a Torque of 68.0 Nm (6.9 kgf-m or 50.2 ft.lbs).
How much does the Triumph Speed Four weigh?
The 2003 Triumph Speed Four has a Dry weight of 170.0 kg (374.8 pounds).
Shop this bike
Affiliate linksWe may earn a commission from qualifying eBay or Amazon purchases made through these links. As an Amazon Associate I earn from qualifying purchases.
Please log in or register if you'd like to leave a comment.
Own one? Add it to My Garage and write an owner review with an Owner badge.