| MODEL | KAWASAKI KLX 400R 2003 |
| Year | 2003 |
| Engine Type | Four stroke, single cylinder, DOHC, 4 valve |
| Displacement / Capacity | 398 cc / 24.3 cu in |
| Bore X Stroke | 90 x 62.6 mm |
| Compression Ratio | 11.3:1 |
| Cooling System | Liquid cooled, 50% distilled water and 50% ethylene glycol antifreeze |
| Max Power | 40 hp / 29.2 kW @ 8500 rpm |
| Max Torque | — |
| Ignition | Digital CDI |
| Induction | Keihin FCR39 |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 speed |
| Clutch | Wet, multi-disc, manual |
| Final Drive | Chain, 520, O-ring; 14-tooth front, 50-tooth rear |
| CHASSIS SPECS | |
| Frame | High-tensile steel perimeter |
| Front Suspension | Telescopic, oil-damped, 11-way compression damping, adjustable spring preload, 287 mm / 11.3 in travel |
| Rear Suspension | Link-type, fully adjustable spring preload, 26-way compression damping, 294 mm / 11.6 in travel |
| Front Brakes | Single 250 mm disc, 2-piston caliper |
| Rear Brakes | Single 220 mm disc, 1-piston caliper |
| DIMENSION SPECS | |
| Overall Length | 2235 mm / 88.0 in |
| Overall Width | 825.5 mm / 32.5 in |
| Overall Height | 1244.6 mm / 49.0 in |
| Seat Height | 945 mm / 37.2 in |
| Wheelbase | 1473 mm / 58.0 in |
| Ground Clearance | 325 mm / 12.8 in |
| Dry Weight | 119 kg / 262 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 80/100-21 |
| Rear Tyre | 120/90-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 10 Litres / 2.6 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The KLX 400R is a 398 cc dual-sport single that the page describes as a rebadged Suzuki DR-Z400, from a Kawasaki and Suzuki collaboration. Reviewers praised its strong power, plush suspension and comfortable seat, but found it heavier than they wanted for racing. They judged it a good trail bike rather than a race machine.
