| MODEL | KAWASAKI KLX 450R 2008 - 2009 |
| Year | 2008 - 2009 |
| Engine Type | Four stroke, single cylinder, DOHC, 4 valves per cylinder |
| Displacement / Capacity | 449 cc / 27.3 cu in |
| Bore X Stroke | 96.0 x 62.1 mm |
| Compression Ratio | 12.0:1 |
| Cooling System | Liquid cooled |
| Max Power | 56.4 hp / 41.5 kW @ 8500 rpm |
| Max Torque | 50 Nm / 5.1 kg-m @ 7500 rpm |
| Ignition | Digital AC-CDI |
| Induction | Keihin FCR |
| Start System | Electric & kick |
| TRANSMISSION SPECS | |
| Lubrication | Forced lubrication, semi-dry sump |
| Gear Box | 5 speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Aluminum, perimeter |
| Front Suspension | 48 mm inverted AOS-type cartridge fork, 22-way compression and 20-way rebound damping, 285 mm / 11.2 in travel |
| Rear Suspension | UNI-TRAK single shock, 22-way low-speed and two-turn variable high-speed compression damping, 22-way rebound damping, 278 mm / 10.9 in travel |
| Front Brakes | Single 250 mm disc, 2-piston caliper |
| Rear Brakes | Single 240 mm disc, 1-piston caliper |
| DIMENSION SPECS | |
| Overall Length | 2180 mm / 85.8 in |
| Overall Width | 820 mm / 32.3 in |
| Overall Height | 1255 mm / 49.4 in |
| Seat Height | 940 mm / 37.0 in |
| Wheelbase | 1480 mm / 58.3 in |
| Ground Clearance | 320 mm / 12.6 in |
| Dry Weight | 115 kg / 253.5 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 80/100-21 |
| Rear Tyre | 110/100-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 8 Litres / 2.1 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The KLX 450R is an off-road bike that uses the engine and chassis layout of the KX450F motocrosser, retuned for stronger low- and mid-range power. Kawasaki added an electric starter alongside the kick, a five-speed gearbox, an 18-inch rear wheel and a larger fuel tank. Its suspension is tuned for trail riding rather than motocross, and reviewers found the stock engine smooth and quiet but less aggressive than racers expect.
