Ninja ZX-6R

2004 Kawasaki Ninja ZX-6R Technical Analysis & Specification Breakdown

At the heart of the 2004 Kawasaki Ninja ZX-6R sport motorcycle, Kawasaki features a 636 cc (38.8 cu in) in-line four, four-stroke configuration. In factory specification, peak output is rated at 125 HP (91.2 kW) while maximum torque reaches 67 Nm (49.4 lb-ft), transferring power to the rear wheel through a 6-speed gearbox. With a specific output of 196.5 HP per liter, the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.

On the scales, the Ninja ZX-6R measures 161 kg (355 lbs) dry, translating to a power-to-weight ratio of 0.78 HP/kg (1.29 kg per horsepower).

Within MotoLibrary's Kawasaki archive, this model family spans 16 indexed model years from 2004 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.