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NGK Spark Plug - CPR9EAIX-9 - 97673

NGK Spark Plug - CPR9EAIX-9 - 97673

The CPR9EAIX-9 spark plug is engineered to provide peak performance for motorcycle engines, delive...

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eBaySpark Plug For Yamaha VP 125 X-City 08-13 CPR9EAIX-9 97673
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Product Information

Full details

The NGK CPR9EAIX-9 (97673) is a high-performance iridium spark plug designed for motorcycle enthusiasts looking to optimize engine ignition and combustion efficiency. It is best suited for riders who prioritize throttle response and long-term durability in their engines; however, users should ensure the heat range and thread specifications precisely match their motorcycle’s OEM requirements to avoid engine damage.

All features

Model Part Number97673
BrandNGK

Extended Product Information

FAQs

Does this spark plug come pre-gapped?

While NGK spark plugs are usually set to a standard gap, it is crucial to check and adjust the gap according to your motorcycle manufacturer's specific requirements before installation.

Can I use this on any motorcycle?

No. This spark plug has specific heat range, thread size, and reach specifications. Only use this plug if your motorcycle manual explicitly lists it or an equivalent NGK part.

Should I use anti-seize on the threads?

NGK recommends against using anti-seize on their new spark plugs, as they come with a special trivalent plating that prevents seizing.

How often should I replace this plug?

While iridium plugs last longer than standard plugs, you should follow your motorcycle’s maintenance schedule for spark plug replacement, typically inspected every 7,500 to 12,000 miles depending on usage.

What does the 'CPR' in the part number signify?

The letters indicate the spark plug's specific dimensions, including thread diameter, construction type, and the design of the resistor and firing end.

Troubleshooting

Engine misfiring or running rough

Check the spark plug gap to ensure it meets factory specifications and inspect the ignition coil/wire connection.

Difficulty starting the engine

Verify that the spark plug boot is firmly seated and that the plug is not fouled with excess oil or fuel deposits.

Pros and Cons

Pros

  • Improved throttle response and engine smoothness
  • High durability under demanding riding conditions
  • Longer maintenance intervals due to iridium wear resistance
  • Consistent and reliable ignition performance

Cons

  • More expensive than standard copper-core spark plugs
  • Requires careful installation to avoid cross-threading
  • Specific fitment required; not a universal plug

Setup, Compatibility & Care

Before installation, always verify the `CPR9EAIX-9` part number against your motorcycle owner's manual. To install, ensure the engine is cool to the touch. Remove the spark plug boot and use a high-quality spark plug socket to carefully unscrew the old plug. When inserting the new NGK plug, hand-thread it first to prevent cross-threading the cylinder head, which can lead to expensive repairs. Use a torque wrench to tighten the plug to the manufacturer's specified torque rating—do not overtighten. Avoid using anti-seize compound on the threads unless explicitly recommended by the manufacturer, as NGK plugs often feature a trivalent plating that acts as a lubricant.

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