The bike that started the four-stroke revolution keeps moving forward with chassis and engine refinements that ensure the five-titanium-valved YZ450F remains at the head of the open-class pack. The ...

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Standard equipment includes the features that come with this vehicle. Select Your Options Choose options to include in this vehicle value. Only select options that are in addition to standard ...

- The 449cc engine's piston clearance has been reduced, the cams revised and the intake port reshaped for better bottom-end response. - The CDI advance timing has been revised. - The exhaust pipe gets ...