{"product_id":"309-machine-hp261c-cnc-ported-cylinder-kit","title":"309 Machine HP261C CNC Ported Cylinder Kit","description":"\u003cp data-start=\"0\" data-end=\"168\"\u003eWake up your saw with precision CNC porting from 309 Machine. Our focus is simple: maximize power while maintaining the reliability and durability professionals expect.\u003c\/p\u003e\n\u003cp data-start=\"170\" data-end=\"358\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"174\" data-end=\"184\"\u003eHP261C\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCylinder Kit represents the ideal balance of high performance and longevity, delivering \u003cstrong data-start=\"260\" data-end=\"295\"\u003eincreased torque and horsepower\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ealong with improved throttle response and cutting performance.\u003c\/p\u003e\n\u003cp data-start=\"360\" data-end=\"497\"\u003e\u003cstrong data-start=\"360\" data-end=\"378\"\u003eImportant Note\u003c\/strong\u003e\u003cbr data-start=\"378\" data-end=\"381\"\u003eThis cylinder kit fits\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"404\" data-end=\"440\"\u003elater production MS261 saws only\u003c\/strong\u003e. Compatible with saws\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"463\" data-end=\"496\"\u003eafter serial number\u003cspan\u003e 507337395\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"499\" data-end=\"518\"\u003e\u003cstrong data-start=\"499\" data-end=\"518\"\u003eWhat’s Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"520\" data-end=\"710\"\u003e• Brand new OEM Stihl Cylinder Kit\u003cbr data-start=\"554\" data-end=\"557\"\u003e     • Stihl Part Number 1141-020-1230\u003cbr data-start=\"590\" data-end=\"593\"\u003e     • OEM cylinder\u003cbr data-start=\"607\" data-end=\"610\"\u003e     • OEM piston\u003cbr data-start=\"622\" data-end=\"625\"\u003e     • Piston rings\u003cbr data-start=\"639\" data-end=\"642\"\u003e     • Piston Wrist Pin\u003cbr data-start=\"654\" data-end=\"657\"\u003e     • Circlips\u003cbr data-start=\"667\" data-end=\"670\"\u003e• 309 Machine Decomp Plug\u003c\/p\u003e\n\u003cp data-start=\"712\" data-end=\"815\"\u003e\u003cspan\u003eBase gasket must be reused or replaced. \u003c\/span\u003eGaskets are sold separately. We recommend using a piston ring clamp set when installing a new cylinder.\u003c\/p\u003e\n\u003cp data-start=\"817\" data-end=\"846\"\u003e\u003cstrong data-start=\"817\" data-end=\"846\"\u003ePerformance Work Includes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"848\" data-end=\"1073\"\u003e• CNC cylinder porting\u003cbr data-end=\"25\" data-start=\"22\"\u003e• Exhaust port enlargement, timing, and polishing\u003cbr data-end=\"77\" data-start=\"74\"\u003e• Intake port timing\u003cbr data-end=\"100\" data-start=\"97\"\u003e• Transfer port timing adjustments and flow optimization\u003cbr data-end=\"159\" data-start=\"156\"\u003e• Squish band machining for improved combustion efficiency\u003cbr data-end=\"220\" data-start=\"217\"\u003e• Base cut for increased compression\u003c\/p\u003e\n\u003cp data-start=\"1127\" data-end=\"1275\"\u003ePerfect for refreshing a tired saw or for those who want ported performance without long lead times. These units are\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1244\" data-end=\"1274\"\u003ein stock and ready to ship\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"1277\" data-end=\"1393\"\u003eFor maximum performance, we recommend pairing this cylinder with a\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1344\" data-end=\"1392\"\u003eperformance exhaust and high flow air filter\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"1395\" data-end=\"1406\"\u003e\u003cstrong data-start=\"1395\" data-end=\"1406\"\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1408\" data-end=\"1441\"\u003e• Stihl MS261\u003cbr data-start=\"1421\" data-end=\"1424\"\u003e• Stihl MS261 C M\u003c\/p\u003e\n\u003cp data-start=\"1456\" data-end=\"1535\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e \u003c\/p\u003e","brand":"309 Machine","offers":[{"title":"Default Title","offer_id":51772384149815,"sku":null,"price":635.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0965\/4570\/2199\/files\/IMG_7953.jpg?v=1773340256","url":"https:\/\/undauntedmfg.com\/products\/309-machine-hp261c-cnc-ported-cylinder-kit","provider":"Undaunted Manufacturing","version":"1.0","type":"link"}