Cylinders by Cylinder Works

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Cylinder Works cylinders, standard & big bore, look virtually identical to the OEM. Plus, they are Nickel Silicon Carbide plated for long life and precision honed to exact size for easy piston installation. Except for the +3mm big bore kit for the Honda CRF250R & CRF250X which require case modification, the big bore cylinders are designed as a true “drop in” with no extra machine work to your engine or cases.