FX 400 R

1989 Kawasaki FX 400 R Technical Analysis & Specification Breakdown

Positioned in Kawasaki's naked motorcycle lineup, the 1989 Kawasaki FX 400 R relies on a 400 cc (24.4 cu in) liquid-cooled in-line four, four-stroke powerplant. In factory specification, peak output is rated at 59 HP (43.1 kW) at 12,000 rpm while maximum torque reaches 36 Nm (26.6 lb-ft) at 10,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 147.5 HP per liter and a 1,500 rpm working window between peak torque (10,500 rpm) and peak power (12,000 rpm), the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.

On the scales, the FX 400 R measures 170 kg (375 lbs) dry, translating to a power-to-weight ratio of 0.35 HP/kg (2.88 kg per horsepower).