| MODEL | HONDA CRF 450X 2009 - 2010 |
| Year | 2009 - 2010 |
| Engine Type | Four stroke, single cylinder, Unicam SOHC, 4 valves |
| Displacement / Capacity | 449 cc / 27.4 cu in |
| Bore X Stroke | 96 x 62 mm |
| Compression Ratio | 12.0:1 |
| Cooling System | Liquid cooled |
| Max Power | 33 kW / 44.8 hp @ 7500 rpm |
| Max Torque | 43 Nm / 4.38 kgf-m @ 7000 rpm |
| Ignition | CD with electronic advance and lighting coil |
| Induction | Keihin 40 mm flat-slide carburettor with throttle position sensor |
| Start System | Electric & kick |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | Wide-ratio 5 Speed |
| Clutch | Wet, multiple discs, cable operated |
| Final Drive | #520 chain |
| CHASSIS SPECS | |
| Frame | Aluminium twin-spar |
| Front Suspension | 47 mm inverted Showa cartridge fork, 16-position rebound and compression adjustment, 315 mm / 12.4 in travel |
| Rear Suspension | Pro-Link Showa single shock, adjustable preload, 17-position rebound, 13-position low-speed and 3.5-turn high-speed compression |
| Front Brakes | Single 240 mm disc, 2-piston caliper |
| Rear Brakes | Single 240 mm disc |
| DIMENSION SPECS | |
| Overall Length | 2178 mm / 85.7 in |
| Overall Width | 821 mm |
| Overall Height | 1273 mm / 50.1 in |
| Seat Height | 963 mm / 37.9 in |
| Wheelbase | 1480 mm / 58.3 in |
| Ground Clearance | 346 mm / 13.6 in |
| Dry Weight | — |
| Wet Weight | 122 kg / 269 lbs |
| WHEEL SPECS | |
| Front Tyre | 80/100-21 |
| Rear Tyre | 110/100-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 7.2 Litres / 1.9 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The 2009-2010 CRF450X continued the second-generation layout with no significant mechanical changes listed. It combined the Unicam single with electric start and a wide-ratio five-speed, a twin-spar aluminium frame, Honda's progressive steering damper and fully adjustable Showa suspension, making it a durable off-road racer and trail bike rather than a street machine.
