Z125

2019 Kawasaki Z125 Technical Analysis & Specification Breakdown

At the heart of the 2019 Kawasaki Z125 naked motorcycle, Kawasaki relies on a 125 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 14.8 HP (10.8 kW) at 10,000 rpm while maximum torque reaches 11.7 Nm (8.6 lb-ft) at 7,700 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 118.4 HP per liter and a 2,300 rpm working window between peak torque (7,700 rpm) and peak power (10,000 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 Z125 measures 146 kg (322 lbs) wet (curb), translating to a power-to-weight ratio of 0.1 HP/kg (9.86 kg per horsepower). Rider ergonomics and chassis geometry center around a 815 mm (32.1 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,330 mm (52.4 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 Kawasaki archive, this model family spans 7 indexed model years from 2017 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.