Motocross Bikes
2003KTM 525 SX Racing
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The 2003 KTM 525 SX Racing is a high-performance motocross machine designed for competitive riders seeking maximum power and agility. Its potent 510cc liquid-cooled four-stroke engine delivers impressive output in a lightweight package, making it ideal for professional and amateur racers. The bike is renowned for its responsive handling and aggressive styling on mixed terrain.
- Capacity
- 510.4 ccm
- Engine
- Single
- Gearbox
- 4-speed
- Dry weight
- 107.0 kg
- Seat height
- 925 mm
- Power
- 56.1 HP (41.3 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for motocross racing, it excels at jumps, berms, and rough closed-course terrain rather than any form of street use.
- Built for
- Sharp, explosive, and razor-focused, this bike rewards aggressive inputs with rapid direction changes and strong acceleration out of corners.
- Not ideal for
- This is not suitable for commuting, touring, carrying a passenger, or any rider seeking comfort and low-maintenance road use.
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
- 510.4 ccm
- Power
- 56.1 HP (41.3 kW)
- Engine type
- Single
- Power/weight ratio
- 0.5243 HP/kg (dry)
- Bore x stroke
- 95.0 x 72.0 mm
- Compression
- 11.0:1
- 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
- 525 mm
- Seat height
- 925 mm
- Dry weight
- 107.0 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 | 510 cc | 510 cc | 510 cc |
| Dry weight | 107 kg | 106 kg | 106 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 525 SX Racing?
The 2003 KTM 525 SX Racing has a Capacity of 510.4 ccm (31.15 cubic inches).
What engine power does the KTM 525 SX Racing have?
The 2003 KTM 525 SX Racing has a Power of 56.1 HP (41.3 kW).
How many gears does the KTM 525 SX Racing have?
The 2003 KTM 525 SX Racing has a Gearbox of 4-speed.
How much does the KTM 525 SX Racing weigh?
The 2003 KTM 525 SX Racing has a Dry weight of 107.0 kg (235.9 pounds).
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