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Discussion Starter · #1 ·
Hello,

I am searching for the correct part number that will be compatible with my 2009 Honda Shadow Aero 750 and wanted to double-check with you all before ordering. I noticed that there are different numbers (4 digit) in front of the part number. Which one is the correct one or can I use both? Thank you!
NGK 5531 DPR6EA-9
NGK 4929 DPR8EA-9
 

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1983 Honda vt750 Shadow
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In the foreign spark plugs numbers, the higher the number the cooler running it is considered.
So the # 8 is cooler and the #6 is a hotter plug.
I don't have the exact manual for 2009 but look at these higher and lower years to see why there are different choices.
Cooler numbers for high speed driving-racing.
 

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Discussion Starter · #6 ·
Do we need to gap the spark plugs or can I install them right out of the box? If I have to gap them what is the measurement?
 

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Most NGK plugs are very well gapped from the factory, but it is always a good idea to double-check before installing anyway.
.032 to .035 " is standard setting.
 
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