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NGK Laser Iridium Spark Plug - SIMR8A-9

NGK Laser Iridium Spark Plug - SIMR8A-9

Rs. 950.00
Rs. 950.00
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The NGK Laser Iridium SIMR8A-9 (93911) is a high-performance spark plug specifically designed as the original equipment (OE) for many modern Honda and Yamaha motorcycles.

As part of the Laser Iridium series, it features a dual-precious metal design—combining an Iridium center electrode with a Platinum ground electrode pad. This construction is engineered for maximum engine life and consistent performance over long service intervals.

Key Technical Specifications

Feature Specification Impact
Model Code SIMR8A-9 (93911) Calibrated for specific high-revving Japanese engines.
Heat Range 8 Medium-cold; perfect for dissipating heat in performance engines.
Thread Size M10 x 1.0 Small diameter thread for modern, compact cylinder heads.
Reach 19 mm Standard 3/4" reach; ensures the spark is perfectly positioned.
Hex Size 16 mm (5/8") Standard spark plug socket size for easy installation.
Gap 0.9 mm Factory pre-set; requires no adjustment for compatible models.

Core Performance Benefits

  • Longest Service Life: The platinum chip on the ground electrode significantly reduces "electrical erosion," allowing the plug to maintain its precise spark gap for up to 100,000 km in some applications.

  • Superior Ignitability: The fine-wire iridium tip focuses electrical energy to create a stronger spark with less voltage, leading to quicker cold starts and a smoother idle.

  • Anti-Fouling Technology: Features a special thermo-edge design that helps the insulator reach self-cleaning temperatures faster, preventing carbon buildup during low-speed city riding.

  • Optimized Combustion: The tapered ground electrode reduces the "quenching" effect, allowing the flame to spread more efficiently for improved fuel economy and crisper throttle response.

Popular Fitment & Compatibility

The NGK Laser Iridium SIMR8A-9 is the factory-recommended plug for several iconic motorcycles:

  • Honda: Primary spark plug for the CBR600RR, CBR1000RR Fireblade, CB1000R, and the VFR800 Interceptor.

  • Yamaha: Specifically used in the YZF-R1 (various year models) and some high-performance YZF-R6 configurations.

  • Suzuki: Compatible with certain high-revving sportbike models requiring an M10 thread with an 8 heat range.

Installation Note

Because this is a Laser Iridium plug with a platinum pad, the gap is extremely precise. Do not use a coin-style gap tool, as you risk snapping the delicate iridium tip. Always use a feeler gauge or wire gauge if you must check the gap. For these 10mm threads, the recommended torque is 7.2–8.7 lb. ft. into an aluminum cylinder head.

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