Positioned in Kawasaki's cross - motocross motorcycle lineup, the 2006 Kawasaki KX 125 pairs a 124 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 40.5 HP (29.6 kW) while maximum torque reaches 26.5 Nm (19.5 lb-ft) at 2,700 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 326.6 HP per liter, the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.
On the scales, the KX 125 measures 87 kg (192 lbs) dry, translating to a power-to-weight ratio of 0.47 HP/kg (2.15 kg per horsepower). Rider ergonomics and chassis geometry center around a 945 mm (37.2 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,470 mm (57.9 in) wheelbase engineered for balanced agility and highway composure. The 8.2-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
326.6 HP/L
Power-to-Weight
0.47 HP/kg (2.15 kg/HP)
Standover Height
945 mm (37.2 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power40.5 HP (29.6 kW))
Torque26.5 Nm (2.7 kgf-m or 19.5 ft.lbs) @ 2700 RPM
Compression10.9:1
Bore x Stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Fuel SystemCarburettor
Fuel ControlOverhead Valves (OHV)
IgnitionDigital CDI
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
Chassis
Frame TypePerimeter, high-tensile steel
Rake27.0°
Front Suspension300 mm
Front Travel275 mm (10.8 inches)
Rear Suspension310 mm
Rear Travel275 mm (10.8 inches)
Wheelbase1470 mm (57.9 inches)
Wheels & Brakes
Front Tyre80/100-M21
Rear Tyre100/90-M19
Dimensions & Weight
Dry Weight87.0 kg (191.8 pounds)
Power/Weight0.4654 HP/kg
Seat Height945 mm (37.2 inches) If adjustable, lowest setting.
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.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
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.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
