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Discussion Starter · #1 ·
I have a 2020 Scout and want to replace the current stock spark plugs (MR7F) with the iridium type. I tried using NGK’s website but they only show the stock plug which was incorrect for my bike per the factory manual. Does anyone know the correct iridium spark plug part number for this application?

Tim
 

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According to the NGK website the heat range for the MR7F spark plug is 7, which makes sense. The NGK CR9EIX is 9, so is colder. I would have assumed the iridium alternative would be CR7EIX.
 

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Discussion Starter · #6 ·
Here they are a little cheaper.....https://www.summitracing.com/parts/NGK-7385

Tim
 

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Discussion Starter · #8 ·
Since I don’t have a tune (stock) I thought I would stay with the original heat range of 7.

Tim
 

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Those are CR7EIX. Not CR9EIX... just to be clear. I think the 9's are recommended, but that's just what I did... I don't really know either way.
Neither the CR7, nor the CR9 plugs are recommended by NGK. NGK state that there is no direct compatible spark plug for the Indian Scout. Both the CR7 and CR9 are Non-Projected plugs whereas the OEM MR7F is a projected plug.
 
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