Cylinder Works 08-13 Yamaha YZ 250 F 250cc Standard Bore Cylinder Kit 13.5:1 Comp. 77mm

New Aftermarket Replacement Cylinder for Standard Bore 77mm. Piston Kit (13.5:1) and Top End Gasket are included to complete top end rebuild. Nickel-Silicon-Carbide Plated Bore. Bore is honed to exact stock bore size for easy piston installation. Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders. Cylinder kit includes matched Vertex pistons to ensure longevity, performance and reduced engine noise. Kit comes complete with gaskets, cylinder, piston, rings, pin and clips. Big bore cylinders do not require machine work. Made in the USA.