NGK CR8EIX Iridium IX Spark Plug for Yamaha R15 / R3, Kawasaki Ninja 250-300 & Honda CBR150R

The NGK CR8EIX Iridium IX spark plug is the iridium upgrade for higher-revving sport and performance singles and twins — the R15-class, Ninja-class and CBR-class machines that live near the top of the tacho. It's the NGK-recommended iridium fitment for these engines.

The 0.6mm fine-wire iridium centre electrode fires a sharper, more concentrated spark — exactly what a high-rpm engine wants for clean combustion at the top end, crisp throttle response, and consistent firing under load. Iridium's hardness holds the gap far longer than copper, so performance stays sharp ride after ride.

Direct-fit, OEM-spec replacement. No tuning changes — just a better spark for engines that work hard.

Fitment (NGK-confirmed)

Yamaha: YZF-R15, YZF-R15 2.0, YZF-R3A

Honda: CBR150R, CBR125R

Benelli: TNT 25 (250cc), TNT 300, Leoncino 500 / 500 Trail, TRK 502 / 502X

Kawasaki: KX 250F (May'09 to 2010), Ninja 250/R, Z250

LML: Beamer, Freedom, Graptor

Not sure if CR8EIX is your plug? Message us on WhatsApp with your bike and year — we'll confirm before you order.

Specifications

• Brand: NGK
• Part Number: CR8EIX
• Type: Iridium IX Spark Plug
• Centre Electrode: Iridium, 0.6mm fine-wire
• Sold as: Single plug

Key Features

• NGK-recommended iridium fitment for high-revving sport bikes
• Sharper spark for clean top-end combustion
• Holds the gap under sustained high-rpm load
• Direct-fit OEM-spec replacement