{"product_id":"ngk-spark-plug-r6252k-105","title":"NGK spark plug R6252K-105","description":"\u003ch2\u003eNGK spark plug R6252K-105\u003c\/h2\u003e\u003cp\u003eThe NGK spark plug R6252K-105 is a racing spark plug for high-output two-stroke applications, commonly specified for IAME X30 kart engines and many Kawasaki KX85\/KX100\/KX112 models. It uses a resistor design and fine-wire, non‑projected center electrode to provide reliable ignition under extreme temperature and vibration.\u003c\/p\u003e\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK part number:\u003c\/strong\u003e 2741 (R6252K-105 Racing Series)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread size:\u003c\/strong\u003e M14 x 1.25, reach 19 mm (3\/4\"), flat\/gasket seat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHex size:\u003c\/strong\u003e 13\/16\" (21 mm) wrench diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResistor:\u003c\/strong\u003e Yes, 5 kΩ internal resistor (solid, non‑removable terminal nut)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat range:\u003c\/strong\u003e 10.5 (NGK racing scale)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter electrode:\u003c\/strong\u003e Copper core with nickel fine‑wire tip, non‑projected\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround electrode:\u003c\/strong\u003e Single slant ground, nickel core with platinum pin tip\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre‑set gap:\u003c\/strong\u003e 0.031–0.032 in (0.8 mm), crush washer included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulator:\u003c\/strong\u003e Alumina silicate ceramic with corrugated ribs, height 2.2 in\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eService context\u003c\/h3\u003e\u003cp\u003eThis NGK R6252K-105 plug targets racing use only, with a wide heat range to manage high combustion temperatures and reduce fouling in competition conditions. NGK lists a typical longevity of up to 30,000 miles in suitable applications, but in karting and motocross it is usually treated as a regular service item and replaced based on tuning practice, plug color, and performance.\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003eThe NGK spark plug R6252K-105 installs as a direct replacement where specified, using a 13\/16\" plug socket and standard crush-washer torque (NGK reference: 18–25.3 lb·ft in cast iron, 18–21.6 lb·ft in aluminium heads).\u003c\/p\u003e\u003ch3\u003eWhat's included\u003c\/h3\u003e\u003cp\u003eEach box contains one NGK R6252K-105 racing spark plug (part no. 2741) with crush washer.\u003c\/p\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":53891183083863,"sku":"2741","price":10.72,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/1936\/9047\/files\/Screenshot_2026-06-30_at_14.42.24.png?v=1782819819","url":"https:\/\/motosports24.com\/products\/ngk-spark-plug-r6252k-105","provider":"Motosports","version":"1.0","type":"link"}