RS 100

1980 Yamaha RS 100 Technical Analysis & Specification Breakdown

At the heart of the 1980 Yamaha RS 100 classic motorcycle, Yamaha pairs a 97 cc (5.9 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 7,800 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 103.1 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.

On the scales, the RS 100 measures 106 kg (234 lbs) wet (curb), translating to a power-to-weight ratio of 0.09 HP/kg (10.6 kg per horsepower). The 9-liter (2.4 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 105 km/h (65 mph).

Within MotoLibrary's Yamaha archive, this model family spans 5 indexed model years from 1975 to 1981, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.