Positioned in Yamaha's atv motorcycle lineup, the 2009 Yamaha YFZ450 pairs a 449 cc (27.4 cu in) liquid-cooled single cylinder, four-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 95.0 x 63.4 mm (3.7 x 2.5 inches) with a 11.4:1 compression ratio.
On the scales, the YFZ450 measures 158.8 kg (350 lbs) dry. Rider ergonomics and chassis geometry center around a 810 mm (31.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,280 mm (50.4 in) wheelbase engineered for quick, flickable steering geometry. The 9.84-liter (2.6 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 2 indexed model years from 2009 to 2012, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
810 mm (31.9 in)
Engine
Displacement449.0 ccm (27.40 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Compression11.4:1
Bore x Stroke95.0 x 63.4 mm (3.7 x 2.5 inches)
Valves/Cylinder5
Fuel SystemCarburettor. Keihin 39mm FCR w/throttle position sensor
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionDC - CDI
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchDrive Train
Chassis
Front SuspensionIndependent double wishbone, w/piggy back High-/Lo-speed compression, rebound and threaded preload adjustment, 9.1-in travel
Rear SuspensionCast aluminum swing arm w/rebound, High-/Lo-speed compression and threaded preload, 10.6-in travel
Wheelbase1280 mm (50.4 inches)
Ground Clearance114 mm (4.5 inches)
Wheels & Brakes
Front Tyre21/7-10
Rear Tyre20/10-9
Front BrakesDouble disc
Rear BrakesSingle disc
Dimensions & Weight
Dry Weight158.8 kg (350.0 pounds)
Seat Height810 mm (31.9 inches) If adjustable, lowest setting.
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.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
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.
