Cylinder Kit 72ccm / 47mm The piston has 2 additional CNC milled lnutnen piston skirt, in this it collects engine oil to improve the necessary cylinder lubrication and emergency characteristics. Especially for sensitive to the run-in phase of the cylinder, the piston is provided with an additional molybdenum coating. With 2 oil wells and 1 each groove in the bearing points of the piston pin, the piston pin is better lubricated. The compression ratio has been specially adapted to the needs of everyday use. Naraku’s usual high production quality and excellent power delivery characteristics of this 47mm cylinder kit. The kit can be used with the original carburetor, but it is recommended to adjust the main jet. Supplied with all necessary components for assembly are included.