125 Duke

2011 KTM 125 Duke Technical Analysis & Specification Breakdown

At the heart of the 2011 KTM 125 Duke naked motorcycle, KTM features a 125 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 20.6 HP (15 kW) at 10,500 rpm while maximum torque reaches 12 Nm (8.9 lb-ft) at 8,000 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 164.8 HP per liter and a 2,500 rpm working window between peak torque (8,000 rpm) and peak power (10,500 rpm), the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.

On the scales, the 125 Duke measures 128 kg (282 lbs) wet (curb), translating to a power-to-weight ratio of 0.16 HP/kg (6.21 kg per horsepower). Rider ergonomics and chassis geometry center around a 810 mm (31.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,350 mm (53.1 in) wheelbase engineered for quick, flickable steering geometry. The 11-liter (2.9 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's KTM archive, this model family spans 15 indexed model years from 2011 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.