NGK Iridium Spark Plug - 97446

The NGK MR6K-9 Iridium spark plug is engineered to provide superior performance and reliability fo...

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eBaySpark Plug Fit Honda GB 350 S 2025 MR6K-9
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GhostBikes.comNgk 97446 - Iridium Spark Plug For Honda Gb 350S Abs 2025-2026
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Product Information

Full details

The NGK MR6K-9 Iridium Spark Plug is designed for motorcycle enthusiasts and mechanics looking to optimize engine performance and longevity. By utilizing an advanced iridium alloy center electrode, it delivers superior spark consistency and durability, though it may require precise gapping during installation to match specific engine requirements.

All features

Model Part Number97446
BrandNGK

Extended Product Information

FAQs

How long do NGK Iridium spark plugs last?

While lifespan depends on riding conditions, iridium plugs typically last significantly longer than standard nickel plugs due to their superior resistance to erosion.

Should I gap the iridium plug before installation?

Yes, check the gap against your engine manufacturer's specifications. Always use a feeler gauge carefully to avoid damaging the center electrode.

Can I use this in any motorcycle?

No. You must verify compatibility with your specific motorcycle engine and manufacturer requirements before purchase.

Does this spark plug improve fuel economy?

The efficient combustion promoted by the iridium design can lead to better fuel economy compared to a worn-out or inefficient plug.

What happens if I touch the tip of the electrode?

The center electrode is very thin. Touching it or using abrasive tools can weaken it, potentially leading to premature failure.

Troubleshooting

Engine misfire or rough idle

Check the gap of the spark plug and ensure the terminal nut is tightened correctly.

Difficulty starting the engine

Verify that the plug is not fouled with excess carbon and check the ignition coil connection.

Plug appears damaged upon inspection

Do not attempt to repair the iridium electrode; replace the plug immediately to prevent engine damage.

Pros and Cons

Pros

  • High heat resistance prevents electrode melting
  • Improved throttle response for better acceleration
  • Extended longevity compared to standard plugs
  • Enhanced combustion efficiency supports fuel economy

Cons

  • Higher initial cost than entry-level nickel plugs
  • Requires careful handling to avoid damaging the fine electrode
  • Specific compatibility must be verified against engine manuals

Setup, Compatibility & Care

To ensure optimal performance, verify that the MR6K-9 matches your motorcycle's specific heat range and thread specifications listed in your owner's manual. When installing, use a torque wrench to reach the manufacturer-recommended tightness to prevent cylinder head damage. Avoid cleaning the iridium tip with a wire brush, as this can damage the thin, precious metal layer. If the plug needs cleaning, use a specialized spark plug cleaner or replace it if carbon buildup is excessive.

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