Motocross Bikes
2021Honda CRF450RX
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The 2021 Honda CRF450RX is a versatile enduro bike designed for off-road enthusiasts seeking reliable trail and competition performance. Its liquid-cooled 449cc four-stroke single-cylinder engine with PGM-FI fuel injection delivers consistent power across varied terrain. Known for Honda's durable engineering and user-friendly characteristics, the CRF450RX excels in both recreational riding and serious enduro competition.
- Capacity
- 449.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 107.0 kg
- Seat height
- 965 mm
- Power
- 50.0 HP (36.8 kW)
What’s new for the 2021 Honda CRF450RX
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Wet weight | 115.7 kg (255.1 pounds) | 113.9 kg (251.1 pounds) |
| Fuel capacity | 8.50 litres (2.25 US gallons) | 8.00 litres (2.11 US gallons) |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built for cross-country and hard enduro-style off-road riding, with the durability and lighting/spark arrestor considerations typical of a closed-course and trail-legal race bike rather than street commuting.
- Built for
- It has the raw, high-strung feel of a factory-style motocross-derived engine tuned for tractable power delivery over rocks, roots, and trails, rewarding an aggressive, active riding style.
- Not ideal for
- This is not the right choice for new riders, commuters, highway travel, two-up riding, or anyone wanting a comfortable, low-maintenance daily street bike.
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
- 449.0 ccm
- Power
- 50.0 HP (36.8 kW)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.4673 HP/kg (dry)
- Bore x stroke
- 96.0 x 62.0 mm
- Compression
- 13.5:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- CDI
- Valves per cylinder
- 4
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Multiplate wet, hydraulically actuated (6 springs, 8 plates)
Dimensions & weight
- Wheelbase
- 1481 mm
- Overall length
- 2182 mm
- Overall width
- 839 mm
- Overall height
- 1282 mm
- Seat height
- 965 mm
- Dry weight
- 107.0 kg
- Wet weight
- 113.9 kg
- Fuel capacity
- 8.00 litres
- Ground clearance
- 335 mm
Chassis & suspension
- Frame
- Semi-double cradle, aluminium twin-spar
- Front suspension
- 49mm inverted Showa fork with rebound and compression damping adjustability
- Rear suspension
- Pro-Link® Showa single shock with adjustable spring preload, rebound and compression damping adjustability
- Front wheel travel
- 310 mm
- Rear wheel travel
- 312 mm
- Rake (fork angle)
- 27.7°
- Trail
- 114 mm
Brakes & wheels
- Front brakes
- Single disc. Two-piston calipers.
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 240 mm
- Front tyre
- 90/90-21
- Rear tyre
- 120/90-18
Other
- Color options
- Red
- Comments
- Model ID: CRF450RX.
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 | 2017 | 2020 | 2021 | 2022 | 2025 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 449 cc | 449 cc | 449 cc | 449 cc | 450 cc | 450 cc |
| Dry weight | 107 kg | 107 kg | 107 kg | 107 kg | 107 kg | 103 kg |
| Seat height | 960 mm | 960 mm | 965 mm | 965 mm | 958 mm | 950 mm |
| Fuel capacity | 8.3 L | 8.5 L | 8 L | 8 L | 8 L | 7.2 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 CRF450RX?
The 2021 Honda CRF450RX has a Capacity of 449.0 ccm (27.40 cubic inches).
What engine power does the Honda CRF450RX have?
The 2021 Honda CRF450RX has a Power of 50.0 HP (36.8 kW).
How many gears does the Honda CRF450RX have?
The 2021 Honda CRF450RX has a Gearbox of 5-speed.
How much does the Honda CRF450RX weigh?
The 2021 Honda CRF450RX has a Dry weight of 107.0 kg (235.9 pounds).
Shop this bike
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The 2021 Honda CRF450RX is a powerful and versatile off-road motorcycle that offers exceptional performance and durability. With its 449cc engine and lightweight chassis, this bike is ready to tackle rugged terrain and deliver a thrilling riding experience. Its advanced suspension system and adjustable settings make it easy to customize the bike to your specific riding style and preferences. Whether you're hitting the trails or competing in off-road races, the CRF450RX is designed to handle it all with ease.
In addition to its impressive performance, the 2021 Honda CRF450RX also boasts a sleek and modern design that is sure to turn heads. The bike's aggressive styling and bold graphics make it stand out on the trail, while its comfortable ergonomics and intuitive controls ensure a confident and enjoyable ride. With Honda's legendary reputation for reliability and quality, the CRF450RX is a top choice for riders who demand the best in off-road performance. Whether you're a seasoned off-road enthusiast or a novice looking to take your riding to the next level, the 2021 Honda CRF450RX is a capable and exciting option that is sure to impress.
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