Motocross Bikes
2021Suzuki RM-Z450
40 fields on record
The 2021 Suzuki RM-Z450 is a competitive 449cc four-stroke motocross bike engineered for intermediate to advanced riders seeking a balanced combination of power and handling. Its liquid-cooled, fuel-injected engine delivers reliable performance across various track conditions, while the aluminum frame and modern suspension geometry make it well-suited for both amateur racers and experienced weekend warriors.
- Capacity
- 449.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 101.5 kg
- Seat height
- 960 mm
- Power
- 56.0 HP (41.2 kW)
What’s new for the 2021 Suzuki RM-Z450
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Front suspension | Showa inverted telescopic, coil spring, oil damped, adjustable damping force | Inverted telescopic, coil spring, oil damped, adjustable damping force |
| Rear suspension | Showa BFRC - link type, coil spring, oil damped, adjustable spring preload and damping force | BFRC-link type, coil spring, oil damped, adjustable spring preload and damping force |
Other years
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for motocross track and off-road competition, not for street or commuting use.
- Built for
- A raw, high-revving, single-cylinder motocross machine that rewards aggressive riding with sharp handling and explosive acceleration out of corners.
- Not ideal for
- Not suitable for beginners, passengers, daily road commuting, or anyone seeking comfort or long-distance touring capability.
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
- 56.0 HP (41.2 kW)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.5517 HP/kg (dry)
- Bore x stroke
- 96.0 x 62.1 mm
- Compression
- 12.5:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Kick
- Ignition
- CDI
- Valves per cylinder
- 4
- Lubrication system
- Semi-dry sump
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet, multi-plate rack-and-pinion clutch
Dimensions & weight
- Wheelbase
- 1480 mm
- Overall length
- 2175 mm
- Overall width
- 835 mm
- Overall height
- 1260 mm
- Seat height
- 960 mm
- Dry weight
- 101.5 kg
- Wet weight
- 112.0 kg
- Fuel capacity
- 6.30 litres
- Ground clearance
- 330 mm
Chassis & suspension
- Frame
- Aluminum alloy, twin-spar
- Front suspension
- Inverted telescopic, coil spring, oil damped, adjustable damping force
- Rear suspension
- BFRC-link type, coil spring, oil damped, adjustable spring preload and damping force
- Front wheel travel
- 310 mm
- Rear wheel travel
- 310 mm
- Rake (fork angle)
- 29.8°
- Trail
- 130 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 270 mm
- Rear brakes
- Single disc
- Front tyre
- 80/100-21
- Rear tyre
- 110/90-19
Other
- Color options
- Championship Yellow/Blue
- Comments
- Traction management system
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 | 2005 | 2011 | 2016 | 2021 | 2022 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 449 cc | 449 cc | 449 cc | 449 cc | 449 cc | 449 cc |
| Dry weight | 101 kg | 102 kg | 102 kg | 102 kg | 102 kg | 102 kg |
| Seat height | 995 mm | 955 mm | 955 mm | 960 mm | 960 mm | 960 mm |
| Fuel capacity | 7 L | 6.2 L | 6.2 L | 6.3 L | 6.3 L | 6.3 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 Suzuki RM-Z450?
The 2021 Suzuki RM-Z450 has a Capacity of 449.0 ccm (27.40 cubic inches).
What engine power does the Suzuki RM-Z450 have?
The 2021 Suzuki RM-Z450 has a Power of 56.0 HP (41.2 kW).
How many gears does the Suzuki RM-Z450 have?
The 2021 Suzuki RM-Z450 has a Gearbox of 5-speed.
How much does the Suzuki RM-Z450 weigh?
The 2021 Suzuki RM-Z450 has a Dry weight of 101.5 kg (223.8 pounds).
Shop this bike
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The 2021 Suzuki RM-Z450 is a powerful and reliable motocross bike that delivers impressive performance on the track. With its fuel-injected 449cc engine, responsive throttle, and lightweight chassis, this motorcycle offers excellent maneuverability and control. The Showa suspension system provides a smooth and stable ride, while the advanced electronics and tuning options allow riders to customize the bike to their preferences. Overall, the 2021 Suzuki RM-Z450 is a top choice for riders looking for a high-performance motocross bike that delivers on power and agility.
If you're in the market for a competitive motocross motorcycle, the 2021 Suzuki RM-Z450 is a must-see. Its powerful engine, responsive handling, and advanced suspension make it a top contender in the motocross racing scene. With its sleek design and customizable tuning options, this bike is a great choice for riders looking to take their off-road riding to the next level. Whether you're a seasoned racer or a weekend warrior, the 2021 Suzuki RM-Z450 is a bike that delivers both power and precision on the track.
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