ETZ 251 (reduced effect)

1989 MuZ ETZ 251 (reduced effect) Technical Analysis & Specification Breakdown

Built around MuZ's motorcycle platform, the 1989 MuZ ETZ 251 (reduced effect) pairs a 243 cc (14.8 cu in) air-cooled single cylinder, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 17 HP (12.4 kW) at 5,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 70 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 ETZ 251 (reduced effect) measures 146 kg (322 lbs) wet (curb), translating to a power-to-weight ratio of 0.12 HP/kg (8.59 kg per horsepower). The 17-liter (4.5 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 113 km/h (70 mph).

Within MotoLibrary's MuZ archive, this model family spans 3 indexed model years from 1989 to 1991, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.