2003KTM 450 SX Racing
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The 2003 KTM 450 SX Racing is a lightweight motocross machine designed for competitive riders seeking aggressive off-road performance. Powered by a liquid-cooled 449cc single-cylinder engine, it delivers potent power delivery in a nimble package weighing just 104 kg. Known for exceptional handling and reliability in racing conditions, this bike excels on technical terrain for intermediate to advanced motocross competitors.
- Capacity
- 449.4 ccm
- Engine
- Single
- Gearbox
- 4-speed
- Dry weight
- 104.1 kg
- Seat height
- 925 mm
- Power
- 44.9 HP (33.0 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for motocross competition and aggressive off-road riding, not for street use or commuting.
- Built for
- Light, razor-sharp, and explosive, this bike rewards aggressive inputs with incredible agility and jump-to-jump responsiveness on the track.
- Not ideal for
- This is not suited for daily commuting, long-distance touring, passengers, or riders seeking a comfortable, low-maintenance street bike.
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
- 449.4 ccm
- Power
- 44.9 HP (33.0 kW)
- Engine type
- Single
- Power/weight ratio
- 0.4313 HP/kg (dry)
- Bore x stroke
- 95.0 x 63.4 mm
- Compression
- 12.0:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- Kokusan digital 4K-3A
- Lubrication system
- Pressure lubrication with 2 Eaton pumps
Transmission
- Gearbox
- 4-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet multi-disc clutch, operated hydraulically
Dimensions & weight
- Wheelbase
- 1481 mm
- Overall width
- 450 mm
- Seat height
- 925 mm
- Dry weight
- 104.1 kg
- Fuel capacity
- 7.00 litres
- Ground clearance
- 380 mm
Chassis & suspension
- Frame
- Chromium molybdenum
- Front suspension
- WP-USD 48/26 MA/PA
- Rear suspension
- WP-PDS-DA shock absorber
- Front wheel travel
- 300 mm
- Rear wheel travel
- 335 mm
- Rake (fork angle)
- 24.0°
- Trail
- 64 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 220 mm
- Front tyre
- 80/100-21
- Rear tyre
- 110/90-19
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 |
|---|---|---|---|
| Capacity | 449 cc | 449 cc | 449 cc |
| Dry weight | 104 kg | 105 kg | 105 kg |
| Seat height | 925 mm | 925 mm | 925 mm |
| Fuel capacity | 7 L | 7 L | 7 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the KTM 450 SX Racing?
The 2003 KTM 450 SX Racing has a Capacity of 449.4 ccm (27.42 cubic inches).
What engine power does the KTM 450 SX Racing have?
The 2003 KTM 450 SX Racing has a Power of 44.9 HP (33.0 kW).
How many gears does the KTM 450 SX Racing have?
The 2003 KTM 450 SX Racing has a Gearbox of 4-speed.
How much does the KTM 450 SX Racing weigh?
The 2003 KTM 450 SX Racing has a Dry weight of 104.1 kg (229.5 pounds).
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