Built around Kawasaki's cross - motocross motorcycle platform, the 1990 Kawasaki KX 250 pairs a 249 cc (15.2 cu in) liquid-cooled single cylinder, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 52.5 HP (38.3 kW) at 8,000 rpm while maximum torque reaches 47.5 Nm (35 lb-ft) at 7,500 rpm, transferring power to the rear wheel through a 5-speed gearbox. With a specific output of 210.8 HP per liter and a 500 rpm working window between peak torque (7,500 rpm) and peak power (8,000 rpm), the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.
On the scales, the KX 250 measures 96.5 kg (213 lbs) dry, translating to a power-to-weight ratio of 0.54 HP/kg (1.84 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,480 mm (58.3 in) wheelbase engineered for balanced agility and highway composure. The 8.5-liter (2.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Kawasaki archive, this model family spans 5 indexed model years from 1990 to 2006, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
210.8 HP/L
Power-to-Weight
0.54 HP/kg (1.84 kg/HP)
Power Band Window
7,500–8,000 rpm
Engine
Displacement249.0 ccm (15.19 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power52.5 HP (38.3 kW)) @ 8000 RPM
Torque47.5 Nm (4.8 kgf-m or 35.0 ft.lbs) @ 7500 RPM
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
