Motocross Bikes

2005Suzuki RM-Z450

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The 2005 Suzuki RM-Z 450 is a competitive motocross bike engineered for experienced riders seeking aggressive performance. Its potent 449cc liquid-cooled four-stroke single delivers strong mid-to-high rpm power, while the lightweight 101kg chassis enables precise handling and quick direction changes. Best known for its reliability and responsive throttle characteristics, it remains a formidable competitor on the track.

Capacity: 449.0 ccm
Engine: Single, four-stroke
Gearbox: 4-speed
Dry weight: 101.0 kg
Seat height: 995 mm
Power: 56.0 HP (41.2 kW)

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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

Off-road & trail97%

Cornering85%

City riding5%

Daily riding8%

Touring5%

Two-up0%

Track55%

Best for: Built purely for motocross racing and aggressive off-road riding, not for street or commuting use.
Built for: A raw, explosive, race-bred bike with razor-sharp handling, long-travel suspension, and an aggressive powerband that rewards commitment and skill.
Not ideal for: This is not a suitable choice for new riders, daily commuting, passengers, or anyone seeking comfort and 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?

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Your height

Inseam (optional)

Units

At 995mm, a rider of 68.9" with a 31" (estimated) inseam will not reach the ground comfortably on the 2005 Suzuki RM-Z450, with a moderate knee angle of around 90 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at over 900 mm — Sky High →

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Full specifications

Engine

Capacity: 449.0 ccm
Power: 56.0 HP (41.2 kW)
Engine type: Single, four-stroke
Power/weight ratio: 0.5545 HP/kg (dry)
Bore x stroke: 95.5 x 62.8 mm
Compression: 12.1:1
Cooling system: Liquid
Fuel system: Carburettor
Starting: Kick
Ignition: Digital AC-CDI
Valves per cylinder: 4
Lubrication system: Semi-dry sump

Transmission

Gearbox: 4-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet, multi-plate rack-and-pinion clutch

Dimensions & weight

Wheelbase: 1486 mm
Overall length: 2184 mm
Overall width: 832 mm
Overall height: 1270 mm
Seat height: 995 mm
Dry weight: 101.0 kg
Wet weight: 123.5 kg
Fuel capacity: 7.00 litres
Ground clearance: 350 mm

Chassis & suspension

Frame: Twin-spar aluminum frame and swingarm.
Front suspension: Telescopic, cartridge-type, 22 compression and 20 rebound settings, 12.2 inches, 310mm of wheel travel
Rear suspension: Link-type, spring preload fully-adjustable, 16 compression and 19 rebound settings, 12.2 inches of 310 of wheel travel
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: 90/90-M21
Rear tyre: 120/90-M19

Other

Color options: Yellow

Specs last verified against published sources: October 2026.

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	2022	2027
Capacity	449 cc	449 cc	449 cc	449 cc	449 cc
Dry weight	101 kg	102 kg	102 kg	102 kg	102 kg
Seat height	995 mm	955 mm	955 mm	960 mm	960 mm
Fuel capacity	7 L	6.2 L	6.2 L	6.3 L	6.3 L