# CR9EIA-9 NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: CR9EIA-9**

Iridium NGK spark plugs offer a longer service life than a standard nickel-tipped spark plug: while nickel-alloy plugs offer a service life of roughly 20,000-40,000km, NGK Iridium IX spark plugs offer a service life of up to 60,000km, so fewer replacements are needed over time despite the higher initial cost.

Precious-metal spark plugs like the NGK Iridium IX also offer higher ignitability, achieved with an exposed fine-tip centre electrode that promotes superior flame growth compared with a standard spark plug. Iridium has a much higher melting point (2410°C) than nickel (1453°C), allowing the centre electrode diameter to be reduced from 2.5mm to 0.6mm – a smaller electrode mass that reduces the impedance to flame progress, helping acceleration, fuel consumption and idle quality.

## ⚙️ Key Features

-   Fine iridium-tipped centre electrode for a slow wear rate and stable idle
-   Longer service life than standard nickel plugs
-   Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
-   Corrugated ribs reduce the risk of flashover
-   Pure alumina silicate ceramic insulator, providing superior strength and better heat transfer
-   Copper core aids in heat removal
-   Triple seals prevent leakage

## 📏 Specifications

-   NGK stock number: 6289
-   Thread: 10 mm
-   Reach: 19 mm (3/4 in)
-   Hex: 16 mm (5/8 in)
-   Seat: Gasket
-   Terminal: Threaded stud
-   Type: Wide Gap

## 🚘 Application

Listed in NGK's application charts for marine, motorcycle, ATV and snowmobile equipment. The chart shows a 1.0 mm gap for these engines, but check it against your engine's manual before fitting.

-   Husqvarna TE310R (302, 2013) – Motorcycle
-   Husqvarna TXC310R (302, 2013) – Motorcycle
-   Husqvarna TC250/R (250, 2012) – Motorcycle
-   Husqvarna TE250R (250, 2013) – Motorcycle
-   Husqvarna TXC250R (250, 2013) – Motorcycle
-   Kawasaki ZG1400 - CONCOURS (1400, 2017-2008) – Motorcycle
-   Kawasaki ZX1400 - NINJA ZX-14 (1400, 2016-2006) – Motorcycle
-   Kawasaki KLZ1000 - VERSYS 1000 (1000, 2017-2015) – Motorcycle
-   Kawasaki ZR1000 - Z1000 (1000, 2008-2007) – Motorcycle
-   Kawasaki ZR1000 - Z1000 (1000, 2016-2010) – Motorcycle
-   Kawasaki ZX1000 - NINJA ZX-10R (1000, 2015-2004) – Motorcycle
-   Kawasaki ZX1000GCF, GDF, HCF, HDF (1000, 2013-2012) – Motorcycle
-   Kawasaki EN650 - VULCAN S (650, 2017-2015) – Motorcycle
-   Kawasaki ER650C - ER-6N (650, 2010-2009) – Motorcycle
-   Kawasaki EX650 - NINJA 650 (650, 2017-2006) – Motorcycle
-   Kawasaki KLE650 - VERSYS 650 (650, 2017-2007) – Motorcycle
-   Suzuki GSX1300BK - B-KING (1300, 2009-2008) – Motorcycle
-   Suzuki GSX1300R - HAYABUSA (1300, 2013-2008) – Motorcycle
-   Suzuki GSX1300RA, Z - HAYABUSA (1300, 2015-2014) – Motorcycle
-   Suzuki GSX-R1000 (1000, 2015-2007) – Motorcycle
-   Suzuki GSX-R750, Z (750, 2015-2011) – Motorcycle
-   Suzuki GSX-R600 (600, 2009-2008) – Motorcycle
-   Suzuki GSX-R600 (600, 2015-2011) – Motorcycle
-   Yamaha VMAX - VMX17 (1700, 2016-2009) – Motorcycle
-   Yamaha YZF-R1 (1000, 2003-2002) – Motorcycle

## 🔄 Supersession & Cross Reference

NGK's cross-reference tables list this plug against these part numbers.

-   DENSO: 5390, IU27D

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 58.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 58.00 AUD | In stock |

## Images

- CR9EIA-9 NGK iridium spark plug
- CR9EIA-9 NGK iridium spark plug firing end

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/cr9eia-9-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03