{"product_id":"6s5-12121-00-00-exhaust-valve-for-yamaha-252sd-1800-2021-2023","title":"6S5-12121-00-00 Exhaust Valve for Yamaha 252SD 1800 2021-2023","description":"\u003ch2\u003eExhaust Valve for Yamaha 252SD\u003c\/h2\u003e\u003cp\u003eThis exhaust valve, reference 6S5-12121-00-00, controls exhaust flow in the 1800 engine used across 2021-2023 Yamaha 252SD models.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis exhaust valve is a replacement component for the Yamaha 252SD equipped with the 1800 engine. The exhaust valve opens and closes at the right moment to release combustion gases, helping the engine breathe and run cleanly. It suits owners maintaining or rebuilding a 2021-2023 Yamaha 252SD who need a fresh valve that matches the original fit.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement for OEM reference 6S5-12121-00-00\u003c\/li\u003e\n\u003cli\u003ePrecision-ground valve face for a clean seal against the seat\u003c\/li\u003e\n\u003cli\u003eHeat-resistant alloy construction suited to exhaust temperatures\u003c\/li\u003e\n\u003cli\u003eStem dimensions matched to the 1800 cylinder head guide\u003c\/li\u003e\n\u003cli\u003eDesigned to maintain proper compression and exhaust flow\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Yamaha 252SD 1800 (2021-2023)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop-end engine rebuilds on the 1800 powerplant\u003c\/li\u003e\n\u003cli\u003eReplacing a burned or leaking exhaust valve\u003c\/li\u003e\n\u003cli\u003eRoutine maintenance for high-hour 252SD boats\u003c\/li\u003e\n\u003cli\u003eRestoring compression and exhaust sealing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6S5-12121-00-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eComponent\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExhaust Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Years\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2021-2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this valve fit the 1800 engine in the 252SD? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, it is listed for the 2021-2023 Yamaha 252SD with the 1800 engine and matches reference 6S5-12121-00-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Should valves be replaced as a set? \u003cstrong\u003eA:\u003c\/strong\u003e Replacing all exhaust valves at once is common practice during a top-end rebuild to keep wear consistent across the head.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":51065641140310,"sku":"OO1C08309","price":50.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_b843e8ec-e315-4042-8fa7-49f72ea69902.jpg?v=1794394688","url":"https:\/\/www.solidspare.com\/products\/6s5-12121-00-00-exhaust-valve-for-yamaha-252sd-1800-2021-2023","provider":"Solid Spare","version":"1.0","type":"link"}