Triumph Speed Four - 2003 Specifications and Reviews
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.
General information | |
| Category | Naked bike |
| Year | 2003 |
| Model | Triumph Speed Four |
Engine and Transmission Specifications | |
| Transmission typefinal drive | Chain |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Fuel control | DOHC |
| Fuel system | Injection |
| Bore x stroke | 68.0 x 41.3 mm (2.7 x 1.6 inches) |
| Compression | 12.5:1 |
| Torque | 68.00 |
| Power | 98.00 |
| Stroke | 4 |
| Engine type | In-line four |
| Capacity: | 599.00 ccm (36.55 cubic inches) |
Physical measures and capacities | |
| Wheelbase | 1,395 mm (54.9 inches) |
| Overall width | 690 mm (27.2 inches) |
| Overall length | 2,060 mm (81.1 inches) |
| Overall height | 1,150 mm (45.3 inches) |
| Seat height | 810 mm (31.9 inches) If adjustable, lowest setting. |
| Dry weight | 170.0 kg (374.8 pounds) |
| | |
Triumph Speed Four dimensions and frame | |
| Rear brakes diameter | 220 mm (8.7 inches) |
| Rear brakes | Single disc |
| Front brakes diameter | 310 mm (12.2 inches) |
| Front brakes | Double disc |
| Rear tyre dimensions | 180/55-ZR17 |
| Front tyre dimensions | 120/70-ZR17 |
Speed and acceleration | |
| Power/weight ratio | 0.5765 HP/kg |
| | |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Fuel capacity | 18.00 litres (4.76 gallons) |
Performance Profile & Rider Fit
Best For
Rider Profile
| Best For | Best suited to riders with some prior experience, as the high-revving inline-four and sharp chassis reward a confident, active riding style. |
| Purpose | Built for spirited road riding and canyon carving, blending a screaming supersport-derived engine with an upright naked-bike stance. |
| Rider Fit | A light dry weight and moderate seat height make it manageable for most rider sizes, though the firm sporty ergonomics ask for decent wrist and core engagement. |
| Character | 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. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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⚠ Safety Recalls (1)
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.
Source: NHTSA. View all Triumph recalls →
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