OzSTOC

Honda ST1100 Section => Honda ST1100 General Questions => Topic started by: Wayne'o on October 03, 2018, 03:22:41 PM

Title: Spark Plugs - NGK CR7EH9
Post by: Wayne'o on October 03, 2018, 03:22:41 PM

Afternoon.

Looking to replace the plugs in my bike (ST1100) and I have lying around a set of new NGK CR7EH9's.
The manual says either CR8EH9 or CR9EH9.
Does anyone know if the CR7EH9's would be ok and if so, have you used them?
Happy to buy the specified plugs but thought I would ask the question.

cheers,
Wayne

Title: Re: Spark Plugs - NGK CR7EH9
Post by: Brock on October 03, 2018, 04:23:00 PM

CR7 will fit, but they are probably too cold for the engine, so the performance will suffer.

Title: Re: Spark Plugs - NGK CR7EH9
Post by: alans1100 on October 03, 2018, 06:12:04 PM

I just go with the iridium ones @ $22.95 each from here https://www.mcas.com.au/shop/item/ngk-c-series-ix-iridium-spark-plugs-03 (https://www.mcas.com.au/shop/item/ngk-c-series-ix-iridium-spark-plugs-03)

but I can get the four for the 1100 in the UK for £24.43 or about $45 plus shipping https://driven2automotive.com/ngk-spark-plugs/4897-4x-ngk-cr8ehix-9-3797-iridium-ix-spark-plugs.html (https://driven2automotive.com/ngk-spark-plugs/4897-4x-ngk-cr8ehix-9-3797-iridium-ix-spark-plugs.html)

The CR7EH-9 is the 1300 standard plug and not sure how it would go on 1100

1300 Iridium plug https://driven2automotive.com/ngk-spark-plugs/4935-4x-ngk-cr7eix-7385-iridium-ix-spark-plugs.html (https://driven2automotive.com/ngk-spark-plugs/4935-4x-ngk-cr7eix-7385-iridium-ix-spark-plugs.html)