Seller notes

Cylinder Works Big Bore 478cc Cylinder Kit Fits:2003-2005 Yamaha YZ 450F 2003-2006 Yamaha WR 450F (+3mm Big Bore Kit) makes 478cc. Std compression. Uses Vertex #23404. Includes Cylinder, Piston, Rings, Pin, Clips, Gaskets Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noise Nickel silicon carbide-plated for long life Kits come comple...

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