NGK Iridium Racing Spark Plug R0451B-8 — Honda CRF250R 2009-2010

Product Description

Experience the pinnacle of ignition technology with the NGK R0451B-8 Iridium Racing Spark Plug. Engineered for riders who demand the absolute best from their engine, this plug represents a massive evolution in spark plug performance, designed specifically for high-stress, off-road applications.

At the heart of this plug is an ultra-small, fine-wire iridium center electrode. Being 25% smaller than platinum and just 1/4 the size of a conventional nickel electrode, it significantly reduces the voltage required to create a spark. This not only promotes a more consistent, powerful burn but also helps extend the life of your entire ignition system. Paired with a new, enhanced anti-corrosion shell plating, these plugs are built to survive the most punishing track conditions.

Top Features: NGK Iridium Racing Spark Plug

• Iridium fine-wire center electrode for maximum durability and performance.
• Ultra-small electrode diameter drastically reduces required ignition voltage.
• Extended ignition system service life due to reduced electrical strain.
• Advanced metal shell plating provides superior anti-corrosion resistance.
• Precision-engineered non-projected tip for race-specific heat dissipation.

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Should I gap this plug differently than stock?
A: This plug comes pre-gapped at 0.7 mm (0.028"). We recommend verifying the gap with a wire gauge tool to ensure it meets the specific requirements of your engine setup before installation.

Q: Is this the same as the standard Iridium IX plug?
A: No, the "Racing" series (R0451B) is designed with different heat dissipation characteristics and a specific non-projected electrode configuration optimized for racing environments compared to the standard street-going IX series.

Expert Pro-Tip

Expert Pro-Tip: When installing your new NGK spark plug, make sure the cylinder head threads are clean and free of debris. Tighten the plug by hand until it seats, then use a torque wrench to reach the manufacturer’s specified torque setting. Over-tightening is a common cause of head thread damage on modern four-stroke engines!

Recommended Pairings

Recommended Pairings:
o Honda CRF250R Performance Parts
o Honda 4-Stroke Performance Parts
o Essential Motorcycle Shop Tools

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