Built around Suzuki's cross - motocross motorcycle platform, the 2018 Suzuki RM-Z450 utilizes a 449 cc (27.4 cu in) liquid-cooled single cylinder, four-stroke layout. Internal engine geometry specifies a bore and stroke of 96.0 x 62.1 mm (3.8 x 2.4 inches) with a 12.5:1 compression ratio.
On the scales, the RM-Z450 measures 112 kg (247 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 960 mm (37.8 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,480 mm (58.3 in) wheelbase engineered for balanced agility and highway composure. The 6.3-liter (1.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Suzuki archive, this model family spans 17 indexed model years from 2008 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
960 mm (37.8 in)
Engine
Displacement449.0 ccm (27.40 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsAluminum cylinder with Suzuki Composite Electrochemical Material (SCEM) coating
Compression12.5:1
Bore x Stroke96.0 x 62.1 mm (3.8 x 2.4 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionElectronic ignition
LubricationSemi-dry sump
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveChain (final drive)
DrivelineChain, DID520MXV4, 114 links
Chassis
Front SuspensionInverted telescopic, coil spring, oil damped, adjustable damping force
Rear SuspensionBFRC - link type, coil spring, oil damped, adjustable spring preload and damping force
Rear Travel310 mm (12.2 inches)
Wheelbase1480 mm (58.3 inches)
Ground Clearance330 mm (13.0 inches)
Wheels & Brakes
Front Tyre80/100-21
Rear Tyre110/90-19
Front BrakesSingle disc
Rear BrakesSingle disc
WheelsAluminum rims with stainless steel spokes.
Dimensions & Weight
Weight incl.112.0 kg (246.9 pounds)
Seat Height960 mm (37.8 inches) If adjustable, lowest setting.
Overall Height1260 mm (49.6 inches)
Overall Length2175 mm (85.6 inches)
Overall Width835 mm (32.9 inches)
Fuel Capacity6.30 litres (1.66 US gallons)
Other
StarterKick
Color OptionsChampionship Yellow with black/blue accents
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.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
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.
