NX 650 Dominator (reduced effect)

1990 Honda NX 650 Dominator (reduced effect) Technical Analysis & Specification Breakdown

Engineered by Honda for the motorcycle segment, the 1990 Honda NX 650 Dominator (reduced effect) utilizes a 644 cc (39.3 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 27 HP (19.7 kW) at 5,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 41.9 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 NX 650 Dominator (reduced effect) measures 178 kg (392 lbs) wet (curb), translating to a power-to-weight ratio of 0.15 HP/kg (6.59 kg per horsepower). The 13-liter (3.4 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 128 km/h (80 mph).

Within MotoLibrary's Honda archive, this model family spans 4 indexed model years from 1989 to 1992, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.