Demonio 125

2021 Ksr Demonio 125 Technical Analysis & Specification Breakdown

Built around Ksr's scooter motorcycle platform, the 2021 Ksr Demonio 125 features a 125 cc (7.6 cu in) air-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 7.2 HP (5.3 kW) at 7,500 rpm, transferring power to the rear wheel through a 5-speed gearbox. With a specific output of 57.6 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.

On the scales, the Demonio 125 measures 119 kg (262 lbs) dry, translating to a power-to-weight ratio of 0.06 HP/kg (16.53 kg per horsepower). The 7.5-liter (2 US gal) fuel tank paired with a rated consumption of 2.6 L/100 km provides an estimated theoretical range of roughly 288 km (179 miles) between fill-ups.

Within MotoLibrary's Ksr archive, this model family spans 2 indexed model years from 2019 to 2021, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.