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NGK Spark Plug - SILMAR10C9S

NGK Spark Plug - SILMAR10C9S

The NGK SILMAR10C9S Laser Iridium spark plug is an original-equipment specification component desi...

Best current price£22.82from The Green Spark Plug Company

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Ngk Silmar10c9s 95468 Spark Plug Iridium New Ngk-Silmar10c9s

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4 offers from £22.82 - £52.10

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The Green Spark Plug CompanyNgk Silmar10c9s 95468 Spark Plug Iridium New Ngk-Silmar10c9s
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£22.82
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eBaySpark Plug Fits Honda CBR 1000 RR 17-23 SILMAR10C9S
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£40.71
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GhostBikes.comNgk 95468 - Standard Spark Plug For Honda Cbr 1000 Rr 2017-2019
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£50.49
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Product Information

Full details

The NGK SILMAR10C9S Laser Iridium spark plug is designed for high-performance motorcycle enthusiasts who demand factory-grade ignition reliability and combustion efficiency. This premium component offers exceptional longevity and consistent engine power due to its laser-welded iridium construction, though users should ensure it is specifically compatible with their motorcycle model's heat range and thread specifications before installation.

All features

Model Part NumberSILMAR10C9S
BrandNGK

Extended Product Information

FAQs

Can I use a gap tool on the SILMAR10C9S?

It is generally recommended not to gap Iridium plugs, as the fine wire electrode is very fragile and easily damaged.

How often should these spark plugs be replaced?

While Iridium plugs last longer than standard plugs, you should follow the replacement interval specified in your motorcycle's maintenance manual.

Why does the center electrode look so small?

The ultra-fine center electrode is a feature of Iridium technology, which requires less voltage to create a spark, resulting in better ignition.

Are these plugs pre-gapped?

Yes, NGK typically sets the gap at the factory, but you should verify it against your vehicle's specific requirements before installation.

Does this plug work in any motorcycle?

No, you must ensure the heat range, reach, and thread size match the specific requirements of your engine model.

Troubleshooting

Engine misfire or rough idle after installation

Verify that the ignition coil wire is fully seated and the spark plug wire connector is clicked into place.

Hard starting in cold weather

Check that the spark plug gap is within the specifications provided by your motorcycle's owner's manual.

Pros and Cons

Pros

  • Extended service life compared to standard copper plugs
  • Maintains consistent ignition performance in high-revving engines
  • Resistant to fouling and carbon buildup
  • Manufactured to precise OEM tolerances

Cons

  • Higher initial cost than entry-level spark plugs
  • Iridium tip is fragile and must be handled with care during installation
  • Requires specific gapping knowledge to avoid damaging the electrode

Setup, Compatibility & Care

Proper installation is critical for the function of Iridium plugs.

  1. Verification: Always verify the part number `SILMAR10C9S` matches your motorcycle’s service manual requirements.
  2. Preparation: Ensure the engine is completely cool before removing old plugs to prevent thread damage in the cylinder head.
  3. Handling: Never attempt to adjust the gap of an Iridium plug by prying against the center electrode, as it is extremely brittle and easily damaged.
  4. Torque: Use a torque wrench to tighten the plug to the manufacturer's specified setting; do not over-tighten, as this can crush the washer and damage the seal.
  5. Maintenance: Periodically inspect the plug during routine oil changes to ensure there is no evidence of excessive oil fouling or improper combustion coloring.

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