2003 Honda CRF 450 R Technical Analysis & Specification Breakdown
Positioned in Honda's cross - motocross motorcycle lineup, the 2003 Honda CRF 450 R utilizes a 449.4 cc (27.4 cu in) liquid-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 55.7 HP (40.7 kW) at 9,000 rpm while maximum torque reaches 50 Nm (36.9 lb-ft) at 6,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 123.9 HP per liter and a 2,500 rpm working window between peak torque (6,500 rpm) and peak power (9,000 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 CRF 450 R measures 109 kg (240 lbs) wet (curb), translating to a power-to-weight ratio of 0.51 HP/kg (1.96 kg per horsepower). Rider ergonomics and chassis geometry center around a 953 mm (37.5 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control. The 7.4-liter (2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Honda archive, this model family spans 6 indexed model years from 2002 to 2008, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
123.9 HP/L
Power-to-Weight
0.51 HP/kg (1.96 kg/HP)
Power Band Window
6,500–9,000 rpm
Standover Height
953 mm (37.5 in)
Engine
Displacement449.4 ccm (27.42 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power55.7 HP (40.7 kW)) @ 9000 RPM
Torque50.0 Nm (5.1 kgf-m or 36.9 ft.lbs) @ 6500 RPM
Compression11.5:1
Bore x Stroke96.0 x 62.1 mm (3.8 x 2.4 inches)
Valves/Cylinder4
Fuel SystemCarburettor
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionDigital CDI
LubricationWet sump
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Chassis
Front SuspensionTelescopic fork
Rear SuspensionMonoshock
Wheels & Brakes
Front Tyre80/100-21
Rear Tyre110/90-21
Front BrakesSingle disc
Rear BrakesSingle disc
WheelsWire spoked
Dimensions & Weight
Dry Weight103.1 kg (227.3 pounds)
Weight incl.109.0 kg (240.3 pounds)
Power/Weight0.5403 HP/kg
Seat Height953 mm (37.5 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
