640 Sport

1995 Jawa 640 Sport Technical Analysis & Specification Breakdown

Built around Jawa's sport motorcycle platform, the 1995 Jawa 640 Sport relies on a 344 cc (21 cu in) air-cooled twin, two-stroke powerplant. In factory specification, peak output is rated at 23.5 HP (17.2 kW) at 5,250 rpm while maximum torque reaches 31.4 Nm (23.2 lb-ft) at 4,750 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 68.3 HP per liter and a 500 rpm working window between peak torque (4,750 rpm) and peak power (5,250 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 640 Sport measures 160 kg (353 lbs) dry, translating to a power-to-weight ratio of 0.15 HP/kg (6.81 kg per horsepower). Rider ergonomics and chassis geometry center around a 750 mm (29.5 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops.