CB 250 RS (reduced effect)

1981 Honda CB 250 RS (reduced effect) Technical Analysis & Specification Breakdown

Positioned in Honda's allround motorcycle lineup, the 1981 Honda CB 250 RS (reduced effect) utilizes a 248 cc (15.1 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 17 HP (12.4 kW) at 7,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 68.5 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 CB 250 RS (reduced effect) measures 148 kg (326 lbs) wet (curb), translating to a power-to-weight ratio of 0.11 HP/kg (8.71 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 136 km/h (85 mph).

Within MotoLibrary's Honda archive, this model family spans 2 indexed model years from 1981 to 1982, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.