{"product_id":"77-50mm-020-over-ring-set-fits-kohler-ch20-ch22-ch620-jp-nonc-49xf","title":"77.50mm .020 Over Ring Set Fits Kohler CH20 CH22 CH620","description":"\u003cp\u003eOne 77.50mm .020 oversize ring set with a 1.5mm top compression ring, a second ring and a three-piece oil ring, for one cylinder of the Kohler 77mm, 624cc twin-cylinder engines. Pistons and gaskets are not included. It fits the CH18, CH20, CH22, CH620, CH621, CH640 and CH641 and the CV18, CV20, CV22, CV620, CV624 and CV640; some CH22, CH620 and CH640 engines are the 80mm, 674cc version, so check the displacement on the nameplate. It is for a cylinder bored .020 over to 77.50mm with .020 oversize pistons; standard rings will not seal an oversize bore. Rings will not seal a scored, glazed or out-of-round bore, so measure taper and out of round, hone lightly for a crosshatch, and check the end gap of each ring in its bore.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eONE RING SET - One 77.50mm .020 oversize ring set with a 1.5mm top compression ring, a second ring and a three-piece oil ring, for one cylinder; a twin needs two. Pistons and gaskets are not included.\u003c\/li\u003e\n\u003cli\u003e1.5MM TOP RING - The 77mm engines use a 1.5mm top ring, so there is no ring style to check on this family.\u003c\/li\u003e\n\u003cli\u003eFITS KOHLER 77MM, 624CC TWINS - CH18, CH20, CH22, CH620, CH621, CH640, CH641, CV18, CV20, CV22, CV620, CV624 and CV640. Some CH22, CH620 and CH640 engines are the 80mm, 674cc version, so check the displacement on the nameplate.\u003c\/li\u003e\n\u003cli\u003e.020 OVERSIZE, 77.50mm - For a cylinder bored .020 over and fitted with .020 oversize pistons. Standard rings will not seal an oversize bore.\u003c\/li\u003e\n\u003cli\u003eCHECK THE BORE FIRST - Rings will not seal a scored, glazed or out-of-round bore. Measure taper and out of round, hone lightly for a crosshatch, and check the end gap of each ring in the bore it will run in.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009599402138,"sku":"JP-NONC-49XF","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/61XyOXQ7ZxL.jpg?v=1793382290","url":"https:\/\/performancesawsupply.com\/products\/77-50mm-020-over-ring-set-fits-kohler-ch20-ch22-ch620-jp-nonc-49xf","provider":"Performance Saw Supply","version":"1.0","type":"link"}