NGK Ignition Spark Plug - LMAR8BI-9 - 91909

NGK LMAR8BI-9 / 91909 Iridium Ignition Spark Plug. With the smallest tip diameter available, OE Ir...

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Product Information

Full details

This guide is for Suzuki DL1000 V-Strom (2014-2019) and V-Strom 1050/1050XT (2020-) owners looking to understand and maintain their NGK LMAR8BI-9 / 91909 Iridium Ignition Spark Plugs. This spark plug offers superior ignitability and long service life, resulting in faster starts and improved fuel economy. However, proper installation and maintenance are essential to realize these benefits.

All features

Model Part Number	91909
Brand	NGK

Extended Product Information

FAQs

What is the recommended torque for installation?

Refer to your motorcycle's service manual for the correct torque specification. Over-tightening can damage the spark plug and engine.

How often should I replace the spark plugs?

Follow the replacement interval recommended in your motorcycle's service manual. However, inspect the plugs regularly for wear.

What is the gap for this spark plug?

The spark plug gap should be set according to the specifications in your motorcycle's service manual.

Can I use this spark plug in other motorcycles?

This spark plug is specifically designed for Suzuki DL1000 V-Strom (2014-2019) and V-Strom 1050/1050XT (2020-). Using it in other models is not recommended.

What kind of anti-seize lubricant should I use?

Use a high-temperature anti-seize lubricant suitable for spark plug threads to prevent seizing.

What are the signs of a failing spark plug?

Common signs include engine misfires, rough idling, difficulty starting, and reduced fuel economy.

Where can I buy these spark plugs?

You can purchase these spark plugs from most motorcycle parts retailers and online stores.

Why is it important to use a torque wrench?

Using a torque wrench ensures that the spark plugs are tightened to the correct specification, preventing damage to the engine or improper sealing.

Troubleshooting

Engine misfires or runs rough.

Check spark plug condition. Replace if fouled or damaged. Verify correct gap and proper installation.

Difficulty starting the engine.

Check spark plug condition and ensure proper gapping. Examine the ignition system for other potential issues.

Reduced fuel economy.

Inspect spark plugs for wear or damage. Ensure proper installation and torque.

Pros and Cons

Pros

Faster engine starts.
Improved fuel economy.
Reduced emissions.
Long service life due to iridium/platinum construction.
Enhanced anti-corrosion properties.
OEM-approved design ensures compatibility and performance.

Cons

Requires proper installation for optimal performance.
May require specific tools for removal and installation.
Performance benefits are dependent on overall engine health.
Potential for damage if over-torqued during installation.
The benefits may not be immediately noticeable on all motorcycles.

Setup, Compatibility & Care

Compatibility: This spark plug is specifically designed for Suzuki DL1000 V-Strom (2014-2019) and V-Strom 1050/1050XT (2020-). Ensure compatibility before installation.

Installation: Proper installation is crucial for optimal performance.

Preparation: Ensure the engine is cool. Gather the necessary tools: a spark plug socket, torque wrench, and anti-seize lubricant.
Removal: Carefully remove the old spark plugs, noting the torque. Inspect the old plugs for signs of wear or damage.
Installation: Apply a small amount of anti-seize to the new spark plug threads. Install the new spark plugs by hand to avoid cross-threading. Use a torque wrench to tighten to the manufacturer's specifications. Do not overtighten.

Care: Regularly inspect spark plugs for wear or fouling. Replace them according to the manufacturer's recommended intervals or if performance declines. Ensure the correct gap is maintained if required.