KE 125

1977 Kawasaki KE 125 Technical Analysis & Specification Breakdown

Positioned in Kawasaki's classic motorcycle lineup, the 1977 Kawasaki KE 125 features a 125 cc (7.6 cu in) air-cooled single cylinder, two-stroke configuration. In factory specification, peak output is rated at 10 HP (7.3 kW) at 6,300 rpm while maximum torque reaches 15.7 Nm (11.6 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 80 HP per liter and a 300 rpm working window between peak torque (6,000 rpm) and peak power (6,300 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the KE 125 measures 109 kg (240 lbs) wet (curb), translating to a power-to-weight ratio of 0.09 HP/kg (10.9 kg per horsepower). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,349 mm (53.1 in) wheelbase engineered for quick, flickable steering geometry. The 9.5-liter (2.5 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 96 km/h (60 mph).

Within MotoLibrary's Kawasaki archive, this model family spans 9 indexed model years from 1975 to 1983, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.