NGK SIMR8A9 Laser Iridium Premium Spark Plug for Honda CBR250R and Rebel 300

The NGK SIMR8A9 Laser Iridium Premium is a top-tier spark plug engineered for Honda's quarter-litre singles, the CBR250R and Rebel 300, and serves as a direct OEM-spec replacement for riders seeking improved ignition performance and extended service intervals. Made in Japan by Niterra Co., Ltd. and carrying BS6 Ready certification, it is built to meet the demands of modern fuel-injected engines.

The Laser Iridium construction uses a precision-laser-welded fine iridium centre electrode that fires a tighter, more focused spark compared to copper or standard iridium plugs. This translates to crisper throttle response, consistent combustion across the rev range, and reliable cold starts. The iridium tip resists gap wear far longer than conventional electrodes, meaning the spark quality stays stable well into the plug's service life.

Check fitment for your vehicle before purchase.

KEY FEATURES

• Laser Iridium Premium construction with precision-welded fine iridium centre electrode delivers a more focused spark than copper or standard iridium alternatives.
• Pre-set 0.9mm electrode gap from the factory, requiring no adjustment at installation for compatible fitment applications.
• BS6 Ready certified, making it fully compatible with modern fuel-injected, emission-compliant Honda engines.
• Extended service interval capability, iridium resists electrode wear significantly longer than copper, reducing replacement frequency.
• Made in Japan by Niterra Co., Ltd., the manufacturer behind the NGK brand, ensuring genuine product authenticity.
• Direct OEM-spec replacement geometry, no tuning changes or modifications required.