SZR 660

1998 Yamaha SZR 660 Technical Analysis & Specification Breakdown

Positioned in Yamaha's allround motorcycle lineup, the 1998 Yamaha SZR 660 features a 659 cc (40.2 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 48 HP (35 kW) at 6,250 rpm while maximum torque reaches 54 Nm (39.8 lb-ft) at 5,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 72.8 HP per liter and a 750 rpm working window between peak torque (5,500 rpm) and peak power (6,250 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 SZR 660 measures 159 kg (351 lbs) dry, translating to a power-to-weight ratio of 0.3 HP/kg (3.31 kg per horsepower). Rider ergonomics and chassis geometry center around a 770 mm (30.3 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance.

Within MotoLibrary's Yamaha archive, this model family spans 3 indexed model years from 1996 to 1998, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.