Athena (P400210100008) 78mm 250cc Standard Bore Cylinder Kit Honda CRE F 250 R 2004-2009; Honda CRE F 250 X 2004-2009; Honda CRF 250 R 2004-2009; Honda CRF 250 X 2004-2015 Contracted from aluminum, the cylinder is lined with a nickel-carbide coating for durable, reliable performance