XJR 400 R

2002 Yamaha XJR 400 R Technical Analysis & Specification Breakdown

Positioned in Yamaha's naked motorcycle lineup, the 2002 Yamaha XJR 400 R features a 399 cc (24.4 cu in) air-cooled in-line four, four-stroke configuration. In factory specification, peak output is rated at 53 HP (38.7 kW) at 11,000 rpm while maximum torque reaches 35 Nm (25.8 lb-ft) at 9,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 132.8 HP per liter and a 1,500 rpm working window between peak torque (9,500 rpm) and peak power (11,000 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 XJR 400 R measures 176 kg (388 lbs) dry, translating to a power-to-weight ratio of 0.3 HP/kg (3.32 kg per horsepower). Rider ergonomics and chassis geometry center around a 780 mm (30.7 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 20-liter (5.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.