525 SX Racing

2003 KTM 525 SX Racing Technical Analysis & Specification Breakdown

At the heart of the 2003 KTM 525 SX Racing cross - motocross motorcycle, KTM features a 510.4 cc (31.1 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 61 HP (44.5 kW) at 8,000 rpm while maximum torque reaches 61 Nm (45 lb-ft), transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 119.5 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.

On the scales, the 525 SX Racing measures 107 kg (236 lbs) dry, translating to a power-to-weight ratio of 0.57 HP/kg (1.75 kg per horsepower). Rider ergonomics and chassis geometry center around a 925 mm (36.4 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,481 mm (58.3 in) wheelbase engineered for balanced agility and highway composure. The 7-liter (1.8 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's KTM archive, this model family spans 3 indexed model years from 2003 to 2005, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.