JRL Pin Piston Rings Set For YX125 125cc Engine Pit Pro Trail Dirt Bike 52.4mm Fits:125cc Engine Pit Pro Trail Dirt Bike YX125 52.4mm Pin Piston Rings Set Size:Piston Diameter: 52.4mm Pin Diameter: 13.00mm Package Includes:As Picture Match original equipment exactly for a perfect fit, easy to install. Please check for the details and make sure this is the right one you need.