Motocross Bikes
2003Honda CRF450R
38 fields on record
The 2003 Honda CRF450R is a competitive motocross machine purpose-built for serious off-road riders seeking race-proven performance. Its potent single-cylinder four-stroke engine delivers responsive power across the RPM range, while the lightweight 103 kg chassis and aggressive geometry enable sharp handling in technical terrain. Best known for reliability and winning capability, the CRF450R set the standard for modern motocross bikes.
- Capacity
- 449.4 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 103.1 kg
- Seat height
- 953 mm
- Power
- 44.9 HP (33.0 kW)
What’s new for the 2003 Honda CRF450R
vs the 2002| Spec | 2002 | 2003 |
|---|---|---|
| Power | 55.0 HP (41.0 kW) | 44.9 HP (33.0 kW) |
| Dry weight | 102.0 kg (224.9 pounds) | 103.1 kg (227.3 pounds) |
| Seat height | — | 953 mm (37.5 inches) |
| Fuel capacity | 7.50 litres (1.98 US gallons) | 7.40 litres (1.95 US gallons) |
| Compression | 11.5:1 | 11.8:1 |
Other years
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
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2014
2015
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2020
2021
2022
2023
2024
2025
2026
2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built specifically for closed-course motocross racing over jumps, whoops, and rough terrain rather than any form of road use.
- Built for
- A light, razor-sharp, high-revving dirt machine that rewards aggressive inputs with explosive acceleration and pinpoint cornering agility.
- Not ideal for
- Not suitable for commuting, touring, passengers, or anyone seeking a comfortable, road-legal, or low-maintenance ride.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 449.4 ccm
- Power
- 44.9 HP (33.0 kW)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.4355 HP/kg (dry)
- Bore x stroke
- 96.0 x 62.1 mm
- Compression
- 11.8:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- CD with electronic advance
- Valves per cylinder
- 4
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Multi plate wet clutch
Dimensions & weight
- Wheelbase
- 1500 mm
- Overall length
- 2186 mm
- Overall width
- 825 mm
- Seat height
- 953 mm
- Dry weight
- 103.1 kg
- Wet weight
- 106.5 kg
- Fuel capacity
- 7.40 litres
- Ground clearance
- 335 mm
- Oil capacity
- 1.80 litres
Chassis & suspension
- Frame
- Aluminium twin tube
- Front suspension
- 47mm inverted Showa cartridge fork with 16-position rebound- and 16-position compression-damping adjustability
- Rear suspension
- Pro-Link Showa single shock with spring-preload, 17-position rebound-damping adjustability, and compression-damping adjustment separated into low speed (13 positions) and high-speed (3.5 turns
- Front wheel travel
- 310 mm
- Rear wheel travel
- 317 mm
- Rake (fork angle)
- 26.8°
- Trail
- 109 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 240 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 240 mm
- Front tyre
- 80/100-21
- Rear tyre
- 110/90-21
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2002 | 2003 | 2008 | 2015 | 2021 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 449 cc | 449 cc | 449 cc | 450 cc | 450 cc | 450 cc |
| Dry weight | 102 kg | 103 kg | — | 109 kg | 107 kg | 103 kg |
| Seat height | — | 953 mm | 955 mm | 953 mm | 965 mm | 953 mm |
| Fuel capacity | 7.5 L | 7.4 L | 7.2 L | 6.4 L | 6.4 L | 7.1 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Honda CRF450R?
The 2003 Honda CRF450R has a Capacity of 449.4 ccm (27.42 cubic inches).
What engine power does the Honda CRF450R have?
The 2003 Honda CRF450R has a Power of 44.9 HP (33.0 kW).
How many gears does the Honda CRF450R have?
The 2003 Honda CRF450R has a Gearbox of 5-speed.
How much does the Honda CRF450R weigh?
The 2003 Honda CRF450R has a Dry weight of 103.1 kg (227.3 pounds).
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