Specifications
Engine
Chassis
Dimensions
Features
All-new 249 cc liquid-cooled four-stroke DOHC single-cylinder engine delivers more power and torque across the entire rev range. The performance increase was achieved through an all-new intake system higher compression ratio (from 13.8:1 to 14.1:1) and WPC treatment (precision shot peening) for the intake and exhaust valve cotters. The rev limit is now 700 rpm higher than the outgoing model.
The YZ250F features the same hydraulic clutch as the YZ450F keeping the meshing point constant even in racing conditions for a stable dependable performance. Increased spring load and a model-specific clutch hose give the clutch lever a natural responsive and light feel with a smoother feathering action delivering controllability on par with a cable-operated clutch.
The drivetrain has been comprehensively overhauled to handle the increased engine output while offering greater reliability. The updated components reduce weight boost strength and improve durability resulting in better reliability.
Although the engine boasts both output and torque gains across the entire rpm range Yamaha still succeeded in reducing noise and a thorough revision of the air cleaner and exhaust system helped the YZ250F meet the relevant noise regulations. The exhaust note has also been tuned to deliver a pleasing high-quality sound.
The YZ250F uses the same frame design as the MXGP race-winning YZ450F. With a lower head pipe and revised tank rails this lightweight bilateral aluminium frame’s improved handling enables you to corner faster and smoother. The lower centre of gravity and reduced weight make the YZ250F more agile than ever and the revised balance of rigidity and YZ250F specific engine mounts give plenty of feel and feedback.
The suspension parts and components are the same as the YZ450F, but the model specific settings for the YZ250F deliver optimal performance. Both front and rear suspensions o er increased damping force improving their ability to follow the ground. From the initial stroke to the end of travel they deliver a high level of shock absorption and comfort that enhances overall traction.
Gallery
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