FZ-S

2025 Yamaha FZ-S Technical Analysis & Specification Breakdown

At the heart of the 2025 Yamaha FZ-S sport motorcycle, Yamaha features a 153 cc (9.3 cu in) air-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 14 HP (10.2 kW) at 8,500 rpm while maximum torque reaches 13.6 Nm (10 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 91.5 HP per liter and a 2,500 rpm working window between peak torque (6,000 rpm) and peak power (8,500 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the FZ-S measures 135 kg (298 lbs) wet (curb), translating to a power-to-weight ratio of 0.1 HP/kg (9.64 kg per horsepower). Rider ergonomics and chassis geometry center around a 790 mm (31.1 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,334 mm (52.5 in) wheelbase engineered for quick, flickable steering geometry. The 12-liter (3.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's Yamaha archive, this model family spans 2 indexed model years from 2018 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.