{"product_id":"rotax-125-senior-max-cylinder-nisic-2025","title":"2. 413531-R Rotax 125 Senior MAX Cylinder NiSiC – 2025","description":"\u003cp\u003eThe \u003cstrong\u003eRotax 125 Senior MAX EVO Cylinder NiSiC\u003c\/strong\u003e (R.413531-R) is the current 2025-specification OEM nikasil-plated cylinder for the Rotax 125 Senior MAX EVO engine. This revised cylinder features the Single Core Digital Print identification marking required for the current season's technical compliance and replaces the previous R.613372 cylinder. The NiSiC (Nickel Silicon Carbide) bore plating provides exceptional wear resistance and heat transfer, maintaining precise bore geometry through thousands of race hours when correctly maintained.\u003c\/p\u003e\n\u003cp\u003eFits: \u003cstrong\u003eRotax 125 Senior MAX EVO\u003c\/strong\u003e only. The Junior MAX EVO, Mini MAX EVO, and Micro MAX EVO use the smaller displacement cylinder (R.413530-R). This cylinder must be used with the correct base gasket thickness (R.650480–R.650483, R.431337) to achieve Rotax-specified squish clearance.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e R.413531-R\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification:\u003c\/strong\u003e NiSiC plated, Single Core Digital Print, 2025 spec\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces:\u003c\/strong\u003e R.613372 (previous Senior MAX cylinder)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Rotax 125 Senior MAX EVO\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCMC Karting stocks the current 2025-spec Senior MAX cylinder alongside matching base gaskets, collar nuts, and cylinder head components for a complete top-end build.\u003c\/p\u003e","brand":"KSG\/Karting Solutions Group","offers":[{"title":"Default Title","offer_id":48168038105309,"sku":"R.413531-R","price":790.93,"currency_code":"USD","in_stock":true}],"url":"https:\/\/cmckarting.com\/products\/rotax-125-senior-max-cylinder-nisic-2025","provider":"CMC Karting","version":"1.0","type":"link"}