{"product_id":"ngk-7791-spark-plug","title":"NGK 7791 Spark Plug","description":"\u003ch2\u003eRacing Spark Plug Overview\u003c\/h2\u003e\u003cp\u003eNGK 7791 is a racing spark plug built with a copper core center electrode, nickel tip materials, and a 5,000 ohm resistor for stable ignition performance. It uses a flat seat, 10 mm thread diameter, 5\/8 hex, and a .75 reach for the specified application.\u003c\/p\u003e\u003cp\u003eFits 2005-2009 Honda CRF250R, N\/A. This NGK spark plug is identified by part number 7791 and stock number 7791, with a pre-gap of .028 and a pin-type ground electrode design.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCopper core center electrode for efficient spark transfer.\u003c\/li\u003e\n\u003cli\u003eNickel center and ground electrode tip materials.\u003c\/li\u003e\n\u003cli\u003e5,000 ohm resistance for ignition system control.\u003c\/li\u003e\n\u003cli\u003eFlat seat, 10 mm thread, and 5\/8 hex for the listed fitment.\u003c\/li\u003e\n\u003cli\u003ePin-type ground electrode with slant configuration.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eNGK 7791 is a secondary ignition spark plug engineered around OE-style construction and consistent electrical performance. The copper core center electrode, nickel tip materials, and 5,000 ohm resistor work together to support reliable spark delivery, while the .028 pre-gap and heat range 8 specification match the listed application requirements. The part number 7791 is also referenced as R0409B-8.\u003c\/p\u003e\u003cp\u003eFor buyers searching for a Honda CRF250R spark plug or an NGK 7791 replacement, this plug provides the specified thread diameter, reach, seat type, and terminal style needed for the application. It is a direct match for the listed 2005-2009 Honda CRF250R fitment.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a worn or fouled spark plug.\u003c\/li\u003e\n\u003cli\u003eRestoring consistent ignition performance.\u003c\/li\u003e\n\u003cli\u003eAddressing hard starting caused by plug wear.\u003c\/li\u003e\n\u003cli\u003eCorrecting misfire concerns related to spark degradation.\u003c\/li\u003e\n\u003cli\u003eMaintaining the specified gap and heat range for the application.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the thread diameter, reach, seat type, and terminal style before installation. Set the gap to the specified .028 inch pre-gap if required by the application, and confirm the ignition system is in good condition before final assembly. Use the listed fitment only: 2005-2009 Honda CRF250R, N\/A.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNGK is a major OE spark plug supplier in North America with more than 80 years of automotive experience. The brand manufactures ignition components to original equipment standards and supports a wide range of automotive, motorcycle, marine, and small engine applications. Part number 7791 reflects that OE-focused manufacturing approach.\u003c\/p\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":53669361746101,"sku":"BCDP-7791","price":57.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NG_7791_Fro.jpg?v=1793691802","url":"https:\/\/www.partcatalog.com\/products\/ngk-7791-spark-plug","provider":"PartCatalog","version":"1.0","type":"link"}