{"product_id":"ngk-laser-platinum-spark-plug-lmar8d-j-93444","title":"NGK SPARK PLUG - LMAR8D-J","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003ch1 data-start=\"135\" data-end=\"181\"\u003eNGK LMAR8D-J Laser Platinum Spark Plug – \u003cmeta charset=\"utf-8\"\u003e\n\u003cspan\u003e93444\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"1\"\u003e\u003cspan\u003eThe NGK Laser Platinum Spark Plug - LMAR8D-J (Part #93444) is an original-equipment-specification multi-ground spark plug engineered for high-compression,\u003c\/span\u003e\u003cspan class=\"\"\u003e liquid-cooled and air\/oil-cooled twin-cylinder adventure and roadster engines.\u003c\/span\u003e\u003cspan\u003e Modern dual-overhead-cam (DOHC) cylinder heads feature compact combustion chambers with tight valve clearances,\u003c\/span\u003e\u003cspan\u003e requiring a narrow 10mm thread diameter and a long 26.\u003c\/span\u003e\u003cspan\u003e5mm thread reach to position the firing tip accurately within the combustion chamber while clearing water jackets.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"2\"\u003e\u003cspan\u003eConstructed with laser-welded platinum alloy firing surfaces on both the fine-wire center electrode and the dual ground electrodes,\u003c\/span\u003e\u003cspan\u003e the LMAR8D-J maintains a consistent spark gap over extended service intervals.\u003c\/span\u003e\u003cspan\u003e The dual ground electrode (\"-J\") configuration provides two distinct spark paths,\u003c\/span\u003e\u003cspan\u003e reducing spark voltage demand,\u003c\/span\u003e\u003cspan\u003e promoting complete flame kernel propagation across lean-burn fuel mixtures,\u003c\/span\u003e\u003cspan\u003e and preventing fouling during low-RPM technical riding or high-altitude operation.\u003c\/span\u003e\u003cspan\u003e Trivalent metal plating on the shell provides corrosion and anti-seize protection inside aluminum cylinder heads,\u003c\/span\u003e\u003cspan\u003e while corrugated alumina silicate ceramic ribs prevent flashover under high ignition coil loads.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\" data-path-to-node=\"3\"\u003eFeatures:\u003c\/h4\u003e\n\u003cul dir=\"ltr\" data-path-to-node=\"4\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,0,0\"\u003e\u003cb data-path-to-node=\"4,0,0\" data-index-in-node=\"0\"\u003eLaser-Welded Platinum Center Electrode:\u003c\/b\u003e\u003cspan\u003e Ultra-fine platinum alloy tip lowers required ignition voltage and resists spark erosion for long service life.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,1,0\"\u003e\u003cb data-path-to-node=\"4,1,0\" data-index-in-node=\"0\"\u003eDual Ground Electrode (-J) Design:\u003c\/b\u003e\u003cspan\u003e Twin ground straps optimize flame kernel growth,\u003c\/span\u003e\u003cspan\u003e improve ignitability in lean fuel mixtures,\u003c\/span\u003e\u003cspan\u003e and distribute wear across two firing surfaces.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,2,0\"\u003e\u003cb data-path-to-node=\"4,2,0\" data-index-in-node=\"0\"\u003eCompact 10mm Long-Reach Architecture:\u003c\/b\u003e\u003cspan\u003e M10 x 1.\u003c\/span\u003e\u003cspan\u003e0 thread pitch with a 26.\u003c\/span\u003e\u003cspan\u003e5mm reach fits modern,\u003c\/span\u003e\u003cspan\u003e narrow-angle 4-valve DOHC cylinder heads.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,3,0\"\u003e\u003cb data-path-to-node=\"4,3,0\" data-index-in-node=\"0\"\u003ePure Alumina Silicate Ceramic Insulator:\u003c\/b\u003e\u003cspan\u003e High-density ceramic core with corrugated ribs provides superior dielectric strength and rapid thermal transfer away from the firing tip.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,4,0\"\u003e\u003cb data-path-to-node=\"4,4,0\" data-index-in-node=\"0\"\u003eSolid Copper Core:\u003c\/b\u003e\u003cspan\u003e Internal copper center conductor dissipates combustion heat efficiently to prevent pre-ignition under sustained high-load touring.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,5,0\"\u003e\u003cb data-path-to-node=\"4,5,0\" data-index-in-node=\"0\"\u003eTrivalent Metal Shell Plating:\u003c\/b\u003e\u003cspan\u003e Anti-corrosion coating eliminates thread galling and seizing in cast aluminum cylinder heads without requiring external anti-seize compounds.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,6,0\"\u003e\u003cb data-path-to-node=\"4,6,0\" data-index-in-node=\"0\"\u003e5k Ohm Ceramic Resistor:\u003c\/b\u003e\u003cspan\u003e Suppresses electromagnetic interference (EMI) and radio frequency interference (RFI) to protect sensitive EFI sensors,\u003c\/span\u003e\u003cspan\u003e ride-by-wire systems,\u003c\/span\u003e\u003cspan\u003e and navigation electronics.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\" data-path-to-node=\"5\"\u003eWhat's in the Box:\u003c\/h4\u003e\n\u003cul dir=\"ltr\" data-path-to-node=\"6\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"6,0,0\"\u003e\u003cspan\u003e1x NGK Laser Platinum Spark Plug - LMAR8D-J (Stock #93444) with Protective Cardboard Thread Sleeve\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"6,1,0\"\u003e\u003ci data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003e(Note: Sold individually. Twin-cylinder engines require 2 plugs per service; verify quantity required for your specific engine before checkout).\u003c\/i\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003ci data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003eFitment:\u003c\/i\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch4\u003e\u003ci data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003e2013–2018 – BMW R 1200 GS \u0026amp; R 1200 GS Adventure\u003cbr\u003e\u003c\/i\u003e\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003e\u003ci data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003e2014–2018 – BMW R 1200 RT\u003c\/i\u003e\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003e\u003ci data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003e2015–2018 – BMW R 1200 RT\u003c\/i\u003e\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003e\u003ci data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003e2\u003cmeta charset=\"utf-8\"\u003e015–2018 – BMW R 1200 R\u003c\/i\u003e\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003e\u003ci data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003e\u003cmeta charset=\"utf-8\"\u003e2015–2018 – BMW R 1200 RS\u003c\/i\u003e\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003e\u003ci data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003e2014–2023 – BMW R nineT\u003c\/i\u003e\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003e\u003ci data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003e2017–2023 – BMW Urban G\/S\u003c\/i\u003e\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\" data-path-to-node=\"7\"\u003eFitment Notes:\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003e\u003c\/b\u003e\n\u003c\/h4\u003e\n\u003cul dir=\"ltr\" data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"8,3,0\"\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eGeneration Distinction Warning:\u003c\/b\u003e\u003cspan\u003e Fits 2013–2018 liquid-cooled 1170cc BMW Boxers and 2014–2023 R nineT models.\u003c\/span\u003e\u003cspan\u003e Does \u003c\/span\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"114\"\u003eNOT\u003c\/b\u003e\u003cspan\u003e fit 2019+ BMW R1250GS \/ R1250GSA ShiftCam engines (which require NGK LMAR8AI-10) or pre-2013 air\/oil-cooled R1200GS Camhead\/Hexhead engines (which require NGK MAR8B-JDS).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/span\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"12\"\u003e\u003cb data-path-to-node=\"12\" data-index-in-node=\"0\"\u003eDo Not Attempt to Adjust Spark Gap:\u003c\/b\u003e\u003cspan class=\"\"\u003e The NGK LMAR8D-J comes pre-gapped from the factory to \u003c\/span\u003e\u003cb data-path-to-node=\"12\" data-index-in-node=\"90\" class=\"\"\u003e0.031\" (0.8 mm)\u003c\/b\u003e\u003cspan\u003e and features a fine-wire laser-welded platinum center tip flanked by two curved ground electrodes.\u003c\/span\u003e\u003cspan\u003e Never insert a coin-style gap ramp or pry against the center electrode; prying against the brittle platinum tip will fracture the weld or chip the ceramic nose.\u003c\/span\u003e\u003cspan\u003e If verifying gap with a wire feeler gauge,\u003c\/span\u003e\u003cspan\u003e slide the wire gently between the center tip and each ground strap without applying leverage.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"13\"\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"13\"\u003e\u003cb data-path-to-node=\"13\" data-index-in-node=\"0\"\u003eDo Not Apply Anti-Seize to Threads:\u003c\/b\u003e\u003cspan\u003e NGK spark plugs feature a shiny trivalent chromate plating engineered specifically to prevent thread seizing and galling in aluminum cylinder heads.\u003c\/span\u003e\u003cspan\u003e Applying copper,\u003c\/span\u003e\u003cspan\u003e nickel,\u003c\/span\u003e\u003cspan\u003e or aluminum anti-seize compounds to trivalent-plated threads lubricates the threads excessively,\u003c\/span\u003e\u003cspan\u003e increasing clamping force by up to 20% at the same wrench torque.\u003c\/span\u003e\u003cspan\u003e Over-torquing a 10mm long-reach plug stretches the steel shell and can strip or crack the aluminum spark plug boss in the cylinder head.\u003c\/span\u003e\u003cspan\u003e Always install the threads clean and dry.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"14\"\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"14\"\u003e\u003cb data-path-to-node=\"14\" data-index-in-node=\"0\"\u003eStrict M10 Torque \u0026amp; Crush Washer Seating:\u003c\/b\u003e\u003cspan\u003e Narrow 10mm spark plugs have significantly lower structural shear limits than standard 14mm plugs.\u003c\/span\u003e\u003c\/p\u003e\n\u003col start=\"1\" dir=\"ltr\" data-path-to-node=\"15\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"15,0,0\"\u003e\u003cspan\u003eBlow out the deep spark plug well with compressed air before removing the old plug so trail sand does not fall into the cylinder.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"15,1,0\"\u003e\u003cspan\u003eThread the new LMAR8D-J into the cylinder head by hand using a rubber hose or thin-wall magnetic 14mm socket until the metal gasket washer contacts the head seat.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"15,2,0\"\u003e\u003cspan\u003eFor a new plug with an uncompressed crush washer,\u003c\/span\u003e\u003cspan\u003e tighten \u003c\/span\u003e\u003cb data-path-to-node=\"15,2,0\" data-index-in-node=\"58\"\u003e1\/2 to 2\/3 of a turn\u003c\/b\u003e\u003cspan\u003e past finger-tight,\u003c\/span\u003e\u003cspan\u003e or torque strictly to \u003c\/span\u003e\u003cb data-path-to-node=\"15,2,0\" data-index-in-node=\"120\"\u003e7.2 – 8.7 lb-ft (10 – 12 Nm)\u003c\/b\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"16\"\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"16\"\u003e\u003cb data-path-to-node=\"16\" data-index-in-node=\"0\"\u003eCoil-On-Plug (COP) Boot Prep:\u003c\/b\u003e\u003cspan\u003e On BMW R1200 liquid-cooled and R nineT boxers,\u003c\/span\u003e\u003cspan\u003e the stick coils sit in exposed cylinder head wells subjected to wheel spray,\u003c\/span\u003e\u003cspan\u003e water crossings,\u003c\/span\u003e\u003cspan\u003e and high exhaust header heat.\u003c\/span\u003e\u003cspan\u003e Apply a thin film of dielectric silicone grease to the inside lip of the rubber coil boot—never on the metal terminal tip—before snapping the coil onto the solid terminal nut.\u003c\/span\u003e\u003cspan\u003e This seals out moisture and prevents the rubber boot from vulcanizing to the ceramic insulator over high mileage.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e\n\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eCross-Reference:\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW:\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003e 12 12 8 532 942 \u003c\/b\u003e(12128532942)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW: \u003cstrong\u003e12 12 7 726 112\u003c\/strong\u003e (12127726112)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0622\/5720\/1317\/files\/MADE_IN_JAPAN.jpg?v=1744046245\" alt=\"\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart Number: 93444\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"TMBR MOTO","offers":[{"title":"Default Title","offer_id":51161919389861,"sku":"NGK-LMAR8D-J","price":26.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/5720\/1317\/files\/NGK_Laser_Platinum_Spark_Plug_LMAR8D-J.png?v=1794447398","url":"https:\/\/www.tmbrmoto.com\/products\/ngk-laser-platinum-spark-plug-lmar8d-j-93444","provider":"TMBR MOTO","version":"1.0","type":"link"}