2014 Yamaha® YZ250F
THE ALL-NEW 2014 YZ250F
Has a brand new EFI engine, an entirely new chassis, superior mass centralization and new suspension components for improved high RPM power with truly instinctive handling.
Key Features May Include:
New liquid-cooled, DOHC 4-valve, fuel-injected engine with the same forward-positioned, straight intake, rear-inclined cylinder, and rear-positioned exhaust layout as the YZ450F. This new engine has more power than the ’13 YZ250F, especially in the mid-to-high rpm range.
The 4-titanium-valve cylinder head is matched to a new fuel injection system that provides more power at mid-to-high rpm. The fuel injection system instantly adjusts the air/fuel mixtures depending on altitude and temperature, for a hesitation-free engine that delivers no matter the conditions.
The new aluminum Bilateral Beam frame offers a superb rigidity balance and, with new front and rear suspension components and settings, provides unmatched lightweight handling. Even fans of the previous YZ250F will be sure to notice the solid handling characteristics, including the light feel in tight corners and during direction changes.
The exhaust pipe has an innovative layout, circling the cylinder, giving the exhaust pipe proper length for an excellent exhaust pulse effect. At the same time, the exhaust pipe has three different diameters throughout the exhaust tract, bringing out excellent power characteristics. This new layout allows the silencer to be positioned 190mm further forward, behind the side panel, making it closer to the middle of the bike for centralized mass for superior handling.
The all-new layout of the seat, fuel tank, air box, and wrap-around exhaust system moves the bike’s mass towards the center for exceptional handling. And, in addition to an all-new appearance, the front intake layout with larger air filter element adds the benefit of reduced air filter maintenance due to its positioning away from dirt roost from the rear wheel.
Accessory GYTR® Power Tuner lets owners adjust air/fuel mixture and ignition timing maps to match engine performance characteristics to the rider and track conditions in a matter of seconds with the push of a few buttons.
A new liquid-cooled, DOHC 4-valve, fuel-injected engine with the same forward-positioned straight intake, rear-inclined cylinder and rear-positioned exhaust layout as the YZ450F. The new engine, with its straight and symmetrical intake and exhaust ports and compact, high-compression combustion chamber, delivers outstanding engine character with more power output and deeper power in the high-speed range.
The new, adjustable fuel injection system uses a 44mm throttle body fed by a high-pressure battery-less electric pump to ensure optimum fuel atomization and air/fuel calibration for excellent readability in a wide range of riding conditions The system provides 3-dimensionally mapped control of the volume of fuel injected and the ignition timing based on engine rpm and throttle opening. This ensures hesitation-free response and controllability and contributes to the high level of high-rpm power.
A newly designed aluminum Bilateral Beam frame is adopted. The overall dimensions are roughly the same as the frame of the 2013 model YZ250F. This gives the new YZ250F a compact chassis that provides a lightweight feeling while leaned over and in the air while also providing solid handling and bump stability.
Saint Charles, Missouri, United States