Spark plug NGK CR9EIX iridium Zongshen 190cc 4-stroke 2-valve head

NGK CR9EIX spark plug for the 190cc 4-stroke Zongshen engine, compatible with all Pit Bike and Dirt Bike engines equipped with a 2-valve cylinder head.

NGK is a renowned, high-quality spark plug brand with many years of experience. NGK spark plugs are not only proven and tested, but also benefit from the latest technical innovations. Spark plugs are sold individually.

This standard NGK spark plug is an original-type motorcycle spark plug used on most two-wheelers. The reliability of standard NGK spark plugs has enabled motorcycle, motocross and moped manufacturers to use them as original equipment on their vehicles.

NGK Iridium IX spark plugs (the benchmark for performance and reliability) are directly derived from racing developments. Designed for demanding, performance-focused customers, they comply with manufacturers’ specifications.

IX-series spark plugs improve original performance in terms of acceleration, easier cold starting, service life and fuel economy. They are particularly suitable for mildly tuned engines and recommended for sporty riding. The use of iridium alloy, a precious metal, makes it possible to reduce the diameter of the center electrode (0.6 mm in iridium instead of 2.5 mm in nickel or 0.8 mm in platinum), creating a very fine tip and lowering the required ignition voltage. This feature ensures faster ignition of the mixture and protects the ignition system.

The beveled shape of the ground electrode reduces the shadow area (the area of unignited fuel) and ensures rapid ignition of the mixture. The iridium-alloy electrode offers superior resistance to high temperatures and erosion. Its slower wear can provide a service life up to 2.5 times longer than that of conventional spark plugs. The anti-fouling system, known as stepped or “2 step,” also provides exceptional performance in urban use and on short trips.