DT 125 E

1979 Yamaha DT 125 E Technical Analysis & Specification Breakdown

Positioned in Yamaha's enduro - offroad motorcycle lineup, the 1979 Yamaha DT 125 E pairs a 123 cc (7.5 cu in) air-cooled single cylinder, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 10 HP (7.3 kW) at 6,800 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 81.3 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the DT 125 E measures 119 kg (262 lbs) wet (curb), translating to a power-to-weight ratio of 0.08 HP/kg (11.9 kg per horsepower). The 7-liter (1.8 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 110 km/h (68 mph).

Within MotoLibrary's Yamaha archive, this model family spans 7 indexed model years from 1974 to 1980, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.