SR 125

1997 Yamaha SR 125 Technical Analysis & Specification Breakdown

At the heart of the 1997 Yamaha SR 125 naked motorcycle, Yamaha features a 125 cc (7.6 cu in) air-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 12 HP (8.8 kW) at 8,500 rpm while maximum torque reaches 10 Nm (7.4 lb-ft) at 8,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 96 HP per liter and a 500 rpm working window between peak torque (8,000 rpm) and peak power (8,500 rpm), 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 SR 125 measures 109 kg (240 lbs) dry, translating to a power-to-weight ratio of 0.11 HP/kg (9.08 kg per horsepower). Rider ergonomics and chassis geometry center around a 730 mm (28.7 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops.

Within MotoLibrary's Yamaha archive, this model family spans 4 indexed model years from 1997 to 2001, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.