| General |
| Year | 2005 - 06 | 2008 - 09 |
| Colours | - | Lime Green |
| Make Model | Yamaha WR 450F | Kawasaki KLX 450R |
| Dimensions |
| Ground Clearance (mm) | - | 320 mm |
| Ground Clearance (in.) | - | 12.6 inches |
| Seat Height | 998 mm / 39.3 in | 940 mm / 37.0 in |
| Wheelbase | 1485 mm / 58.5 in | 1480 mm / 58.3 in |
| Ground Clearance | 365 mm / 14.3 in | 320 mm / 12.6 in |
| Height | 1300 mm / 51.2 in | 1,255 mm / 49.4 in. |
| Length | 2175 mm / 85.6 in | 2,179 mm / 85.8 in. |
| Width | 825 mm / 32.5 in | 820 mm / 32.3 in. |
| Weights & Capacities |
| Dry Weight | 112.5 kg / 248 lbs | 115 kg / 253.5 lbs |
| Fuel Capacity | 8 Liters / 2.1 US gal | 8 Litres / 2.1 US gal |
| Wet Weight | 122 kg / 268 lbs | - |
| Performance |
| Max Power | 58 hp / 42.3 kW @ 9000 rpm | 56.4 hp / 41.5 kW @ 8500 rpm |
| Max Torque | 49 Nm / 33.1 lb-ft @ 7000 rpm | 50 Nm / 5.1 kg-m @ 7500 rpm |
| Engine |
| Displacement (cc) | - | 449.00 cc |
| Bore x Stroke (in,) | - | 3.8 x 2.4 inches |
| Fuel Control | - | DOHC |
| Engine Type | - | Single cylinder, four-stroke |
| Bore x Stroke (mm) | - | 96.0 x 62.1 mm |
| Displacement (ci) | - | 27.40 cubic inches |
| Displacement | 449 cc / 27.4 in | 449 cc / 27.3 cu-in |
| Engine Detail | Four stroke, single cylinder, DOHC, 5 titanium valve per cylinder. | Four stroke, single cylinder, DOHC, 4 valves per cylinder |
| Fuel System | - | Carburettor. Keihin FCE |
| Bore x Stroke | 95 x 63.4 mm | 96.0 x 62.1 mm |
| Compression Ratio | 12.5:1 | 12.0:1 |
| Cooling System | Liquid cooled | Liquid cooled |
| Fuel Induction | 39mm Keihin FCR flat-slide throttle position sensor | Keihin FCR |
| Ignition | Digital CDI | Digital AC-CDI |
| Lubrication | Wet Sump | Forced lubrication, semi and #8209;dry sump |
| Starter | Electric / Kick-starter | Electric & kick |
| Valve System | - | 4 |
| Drivetrain |
| Clutch | Wet, multiple discs, cable operated | - |
| Final Drive | "O" ring Chain | Chain |
| Gearbox | - | 5-speed |
| Transmission / Drive | 5 Speed | 5 Speed |
| Chassis |
| Frame Type | Steel, Single cradle frame | Aluminum, perimeter Rake / trail: 27.1 degrees / 4.6 in. |
| Suspension - Front | 46mm Kayaba inverted telescopic fork, compression and rebound damping adjustable | 48mm inverted AOS-type cartridge fork with 22-way compression damping and 20-way rebound damping |
| Suspension - Rear | Fully adjustable Kayaba single shock, 315mm wheel travel, separate speed compression adjustment | Uni-Trak® single shock system with 22-way low-speed, two-turn variable high-speed compression damping and 22-way rebound damping |
| Rake | - | 27.1° |
| Trail | - | 122 mm / 4.8 in. |
| Wheel Travel - Front | 300 mm / 11.8 in | 285 mm / 11.2 in |
| Wheel Travel - Rear | 318 mm / 12.4 in | 278 mm / 10.9 in |
| Wheels & Brakes |
| Brakes - Front Diameter (mm) | - | 250 mm |
| Brakes - Rear Diameter (in.) | - | 9.4 inches |
| Brakes - Rear Diameter (mm) | - | 240 mm |
| Brakes - Front Diameter (in.) | - | 9.8 inches |
| Brakes - Front | Single 250mm disc 4 piston caliper | Single 250mm disc 2 piston caliper |
| Brakes - Rear | Single 245mm disc 2-piston caliper | Single 240mm disc 1 piston caliper |
| Tyres - Front | 80/100-21 | 80/100-21 |
| Tyres - Rear | 110/100-18 | 110/100-18 |