{"product_id":"rotax-125-max-spark-plug-ngk-gr9di","title":"298103 Rotax 125 MAX EVO Spark Plug NGK GR9DI – Optional","description":"\u003cp\u003eThe \u003cstrong\u003eRotax 125 MAX EVO Spark Plug NGK GR9DI\u003c\/strong\u003e (R.298103) is the optional one-step-colder iridium spark plug for the Rotax 125 MAX EVO engine. The GR9DI runs one heat range colder than the standard GR8DI (R.298102) and is used in conditions where the engine runs hotter than normal — such as high-ambient-temperature events, longer track sessions, or higher-output engine builds. Using a colder plug in these conditions reduces the risk of pre-ignition while maintaining clean combustion.\u003c\/p\u003e\n\n\u003cp\u003eCompatible with all Rotax 125 MAX EVO variants: \u003cstrong\u003eSenior MAX EVO, Junior MAX EVO, Mini MAX EVO, and Micro MAX EVO\u003c\/strong\u003e. This is an optional spec — the GR8DI is the standard production plug. Only use the GR9DI when your engine builder or Rotax service documentation recommends it for your specific conditions.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e R.298103\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK Part Number:\u003c\/strong\u003e GR9DI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Iridium, one heat range colder than standard — optional specification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Rotax 125 Senior MAX EVO, Junior MAX EVO, Mini MAX EVO, Micro MAX EVO\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eNot sure which heat range to run? The GR8DI is correct for most conditions. CMC Karting stocks both Rotax-spec NGK plugs so you can choose based on your conditions.\u003c\/p\u003e","brand":"KSG\/Karting Solutions Group","offers":[{"title":"Default Title","offer_id":47938980053213,"sku":"R.298103","price":29.5,"currency_code":"USD","in_stock":true}],"url":"https:\/\/cmckarting.com\/products\/rotax-125-max-spark-plug-ngk-gr9di","provider":"CMC Karting","version":"1.0","type":"link"}