Sting 125

1999 KTM Sting 125 Technical Analysis & Specification Breakdown

Built around KTM's super motard motorcycle platform, the 1999 KTM Sting 125 relies on a 124.8 cc (7.6 cu in) liquid-cooled single cylinder, two-stroke powerplant. In factory specification, peak output is rated at 13.5 HP (9.9 kW) at 8,400 rpm while maximum torque reaches 13.1 Nm (9.7 lb-ft) at 7,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 108.2 HP per liter and a 900 rpm working window between peak torque (7,500 rpm) and peak power (8,400 rpm), 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 Sting 125 measures 121 kg (267 lbs) wet (curb), translating to a power-to-weight ratio of 0.11 HP/kg (8.96 kg per horsepower). Rider ergonomics and chassis geometry center around a 840 mm (33.1 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams, combined with a 1,420 mm (55.9 in) wheelbase engineered for balanced agility and highway composure. The 8.5-liter (2.2 US gal) fuel tank paired with a rated consumption of 4.3 L/100 km provides an estimated theoretical range of roughly 198 km (123 miles) between fill-ups, while factory top speed is listed at 102 km/h (63 mph).

Within MotoLibrary's KTM archive, this model family spans 3 indexed model years from 1997 to 1999, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.