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YZ250F

Key Features

Features Gallery
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    New engine

    The liquid-cooled, DOHC 4-valve, 250cc fuel-injected engine features a forward-positioned straight downdraft intake with symmetrical intake and exhaust ports. A new higher-compression piston and new valves deliver outstanding engine character with a focus on top-end power delivery, and the lighter cylinder is more upright to improve mass-centralization.

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    Exclusive Power Tuner App

    Like the flagship YZ450F, the all-new YZ250F now features a Communication Control Unit (CCU) as standard. Using the Power Tuner app, you can adjust air/fuel mixture and ignition timing maps to tune engine performance for track conditions, record race log information, and monitor a range of data such as maintenance, diagnosis, run time, and more.

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    New ECU map switch

    The new two-mode switchable engine mapping allows you to instantly adjust engine character ‘on the fly’ with the push of a button, making it easy to fine tune the YZ250F for changing track or weather conditions while riding, or in between motos or practice sessions.

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    Lightweight electric starter with lithium-ion battery

    Mounted near the chassis centre to maintain a good weight balance, the YZ250F’s light and compact new electric starter system ensures instant restarts during races and saves you time and effort. Powered by a high-capacity and ultra-lightweight four-cell lithium-ion battery, the system adds minimal weight.

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    Compact new body and seat design

    The YZ250F features new bodywork from tip to tail, including a new compact fuel tank specifically designed for motocross demands. In addition to shaving weight, the new body design is narrow for more comfortable knee grip and feeling of control, and the seat is updated to give the rider additional room to move aboard the machine.

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    New bilateral beam frame

    The YZ250F’s all-new bilateral beam frame further heightens the sense of agility to make the new model one of the best handling bikes in its class. Larger upper frame bracing improves rigidity and durability, while wider rear frame spars and all-new engine mounts centralize mass for the best possible balance of bump absorption, stiffness and feeling of grip.

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    New suspension

    Larger diameter KYB® coil spring-type forks give optimized rigidity for improved feel – while a refined speed-sensitive damping mechanism provides exceptional balance for race-winning handling. A new lightweight KYB® rear shock has been developed for the new chassis and features an increased reservoir capacity for more controlled damping characteristics.

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    New lighter-feeling clutch

    To match the new engine, the 2019 YZ250F is equipped with an all-new clutch with a reduced spring load, giving a much lighter feel at the clutch lever, with excellent operational feel at half clutch. Featuring much thicker friction plates, this heavy-duty clutch ensures enhanced performance, excellent controllability and increased durability.

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    Updated radiator design

    New larger radiators are angled more directly into the incoming air flow for improved cooling under the most demanding race conditions. Inside the engine the water pump is equipped with a new aluminium impeller, and features rerouted coolant pipes that enhance durability under the toughest racing conditions.

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    New axle brackets & wheel collars

    To give improved feedback from the track surface when braking, the YZ250F’s new forks are fitted with larger front axle brackets featuring new shape wheel collars that ensure a higher level of front end rigidity. The increased sensitivity enables you to assess the front wheel traction levels more accurately, giving you greater control.

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    New cam chain assembly

    To accommodate the engine’s higher performance, there’s a new high specification cam chain guide manufactured from Hydrogenated Nitrile Butadiene Rubber (HNBR), giving excellent mechanical strength and high resistance to heat, oil and pressure. Featuring a newly designed tensioner, the new assembly reduces the load and offers greater stability.

Technical Specifications

Download Factsheet
  • Engine
    Engine type
    Liquid-cooled, 4-stroke, 4-valves, DOHC
    Displacement
    250cc
    Bore x stroke
    77.0 mm x 53.6 mm
    Compression ratio
    13.8 : 1
    Maximum power
    kW (PS) @ rpm
    Limited power version
    kW (PS) @ rpm
    Maximum Torque
    Nm @ rpm
    Lubrication system
    Wet sump
    Clutch Type
    Wet, Multiple Disc
    Ignition system
    TCI
    Starter system
    Electric
    Transmission system
    Constant Mesh, 5-speed
    Final transmission
    Chain
    Fuel consumption
    -
    CO2 emission
    -
  • Chassis
    Frame
    Semi double cradle
    Caster Angle
    27º1
    Trail
    119mm
    Front suspension system
    Upside-down telescopic fork
    Rear suspension system
    Monoshock
    Front travel
    310 mm
    Rear Travel
    315 mm
    Front brake
    Hydraulic single disc, Ø270 mm
    Rear brake
    Hydraulic single disc, Ø245 mm
    Front tyre
    80/100 - 21 51M
    Rear tyre
    100/90 - 19 57M
  • Dimensions
    Overall length
    2175 mm
    Overall width
    825 mm
    Overall height
    1285 mm
    Seat height
    970 mm
    Wheel base
    1475 mm
    Minimum ground clearance
    335 mm
    Wet weight (including full oil and fuel tank)
    106 kg
    Fuel tank capacity
    6.2L
    Oil tank capacity
    0.95L