Description MK1001344 Big Bore Cylinder Piston Kit Product Info: Cylinder Bore and Stroke 89.00mm x 70.00mm Included in This Kit: (QTY 1) NICHE 519-CCY2235L Big Bore Engine Cylinder Substitute For OEM Part Numbers(s): 12100-KCY-670, 12100-HN1-A70 (QTY 1) NICHE 186-1004 Namura Piston Kit Substitute For OEM Part Numbers(s): Compatible with the Following Vehicles: Honda XR400R: 1996-2004 WARNING: This product can expose you to chemicals including lead and phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit