Positioned in Yamaha's atv motorcycle lineup, the 2017 Yamaha YFZ450R relies on a 449 cc (27.4 cu in) liquid-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 41 HP (29.9 kW) at 8,600 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 91.3 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the YFZ450R measures 184 kg (406 lbs) wet (curb), translating to a power-to-weight ratio of 0.22 HP/kg (4.49 kg per horsepower). 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 1,270 mm (50 in) wheelbase engineered for quick, flickable steering geometry. The 10-liter (2.6 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 14 indexed model years from 2009 to 2024, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
91.3 HP/L
Power-to-Weight
0.22 HP/kg (4.49 kg/HP)
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
Power41.0 HP (29.9 kW)) @ 8600 RPM
Compression11.8:1
Bore x Stroke95.0 x 63.4 mm (3.7 x 2.5 inches)
Valves/Cylinder5
Fuel SystemInjection. Fuel Injection 42 mm EHS with ISC
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionTCI
LubricationDry sump
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchSlipper clutch
Chassis
Frame TypeAluminum and steel
Front SuspensionIndependent double wishbone, threaded preload adjustable dual-rate coil-over springs, 3-way adjustable damper
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.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
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.
