NGK CR9EHIX-9 Iridium Spark Plug Honda CB 500, CBF 600 04-, CBR 600 F 91-00, CBR 600 F 11-, Hornet 600 98-

NGK CR9EHIX-9 Iridium Spark Plug for Honda Models.
Iridium spark plugs from NGK currently represent the highest-quality technological solution. They have an iridium-alloy tip on the middle electrode. It is welded on in a special process using a laser.

The precious metal iridium is one of the world's hardest metals. It starts melting at a temperature of 2450 °C and is very resistant to spark erosion. Through its use, the service life is doubled on average in comparison to standard spark plugs.

In addition, the precious metal allows the middle electrode to be designed significantly thinner, with a thickness of 0.6 mm. These measures reduce the ignition voltage requirement considerably and contribute to improving the spread of the flame front in the combustion chamber.
The electrode material iridium is almost completely resistant to spark erosion.
Iridium enables an especially narrow middle electrode, with a diameter of only 0.6 mm.
With the small middle electrode, more ignitable mixture reaches the ignition sparks. That leads to a reliable ignition and better spreading of the flame front.

Technical Information NGK CR9EH-9:
Wrench size: 16mm.
Thread diameter: 10,0 mm.
Thread length: 17,0 + 6,3 mm.
Spark gap: 0,9 mm.
Resistence: interference-free, 5 kOhm