640 Classic

1999 Jawa 640 Classic Technical Analysis & Specification Breakdown

At the heart of the 1999 Jawa 640 Classic naked motorcycle, Jawa pairs a 344 cc (21 cu in) air-cooled twin, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 24 HP (17.5 kW) at 5,250 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 69.8 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the 640 Classic measures 149 kg (328 lbs) dry, translating to a power-to-weight ratio of 0.16 HP/kg (6.21 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,370 mm (53.9 in) wheelbase engineered for quick, flickable steering geometry. The 17-liter (4.5 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 120 km/h (75 mph).

Within MotoLibrary's Jawa archive, this model family spans 4 indexed model years from 1994 to 2001, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.