DS 7

1972 Yamaha DS 7 Technical Analysis & Specification Breakdown

Positioned in Yamaha's allround motorcycle lineup, the 1972 Yamaha DS 7 relies on a 247 cc (15.1 cu in) air-cooled twin, two-stroke powerplant. In factory specification, peak output is rated at 24 HP (17.5 kW) at 7,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 97.2 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 DS 7 measures 146 kg (322 lbs) wet (curb), translating to a power-to-weight ratio of 0.16 HP/kg (6.08 kg per horsepower). The 12-liter (3.2 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 140 km/h (87 mph).

Within MotoLibrary's Yamaha archive, this model family spans 2 indexed model years from 1971 to 1972, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.