ER-5

2003 Kawasaki ER-5 Technical Analysis & Specification Breakdown

Positioned in Kawasaki's naked motorcycle lineup, the 2003 Kawasaki ER-5 features a 498 cc (30.4 cu in) twin, four-stroke configuration. In factory specification, peak output is rated at 50 HP (36.5 kW) at 8,500 rpm while maximum torque reaches 45.2 Nm (33.3 lb-ft) at 7,000 rpm. With a specific output of 100.4 HP per liter and a 1,500 rpm working window between peak torque (7,000 rpm) and peak power (8,500 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.

On the scales, the ER-5 measures 179 kg (395 lbs) dry, translating to a power-to-weight ratio of 0.28 HP/kg (3.58 kg per horsepower). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,435 mm (56.5 in) wheelbase engineered for balanced agility and highway composure. The 16-liter (4.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's Kawasaki archive, this model family spans 7 indexed model years from 1997 to 2006, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.