OEM Kawasaki KX100 Cylinder Assembly Brand: OEM Kawasaki Standard Bore: 52.50mm Kit includes the cylinder, cylinder head, power valve, reed valve, nuts, Wiseco ProLite piston kit Fits: 14-21 Kawasaki KX100 Part Numbers: Cylinder 11005-0626 superseded to 11005-0758 Cylinder Head 11001-0774 Power Valve 12005-0731 and 12005-0733 Reed Valve 12021-1123 Wiseco Piston Kit 880M05250 Condition: Used, good condition, cylinder is the stock bore 52.50. I do not feel any grooves in cylinder wall. Piston kit was fitted to cylinder but never started. One of the piston pin circlips is bent slightly. Missing two of the power valve cover screws.