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What’s the best Spark Plugs and Spark Plug Wires for Milwaukee 8’s, and what are you using?
Nothing wrong with the stock plugs and wires. You can change the plugs out every 10k miles and still come out cheaper than buying iridium plugs in the long run. I do like the SE plugs wires because of the color choices.
 

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First, with the need to remove the tank, changing plugs is a bigger deal than it used to be. Second, now that the MoCo uses pazio knock sensors and has kicked that ion voodoo to the curb, there will be less issues with wires.

4 NGK iridium plugs is less than $40, a lot less than the MoCo wants for 4 SE iridium plugs. Less by half.

As for the wires, the secondary voltage is nothing to get excited about, so no need for anything special. OEM wires will be fine. If it turns out the M8's chafe the way twin cams did, just buy $2 worth of armor sleeve. It'll work just as well as $100's worth of 11mm hi performance nito proof 1 million volt race wire guaranteed to give you 10 percent more power.

You really shouldn't even need to think about wires for 50-60K miles.

Well, unless you feel the need for a set that matches the lightning bolts painted on your boots. >:)
 

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Discussion Starter #8
I was getting the fat one 12MM Twisted yeah over $100 but my bike deserves it LOL. Take me 5 days week 50 miles to work 50 miles home LOL. Seriously I like the look kinda stands out and looking at Harley ones well what’s the difference price wise. LOL. As far as plugs thinking of NGK Iridium CR9EIX. Not sure are the CR9EIX all same or is there difference in them?
 

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You sound like you are just looking for something/anything other than the stock stuff. Not sure why. My tuner (reputedly one of the best on the west coast) insists that the HD plugs and wires are perfect; no need to get anything "latest or greatest" (because it may not be). IMO, just use the OEM plugs and wires (unless you are somehow having a problem with them).
 

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You sound like you are just looking for something/anything other than the stock stuff. Not sure why. My tuner (reputedly one of the best on the west coast) insists that the HD plugs and wires are perfect; no need to get anything "latest or greatest" (because it may not be). IMO, just use the OEM plugs and wires (unless you are somehow having a problem with them).

I finally broke myself from having to buy the iridium plugs a few years ago because the only thing they did was last longer. I felt I could buy the cheap stockers and just change them more frequently and still come out ahead money wise. But... Therm just brought up a great point in that you have to at least lift the tank to change the plugs on the M8 so the less frequent I have to do that might be better. I will consider the iridiums again just for that purpose.
 

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Discussion Starter #18
Suggestions on which coped ones over

NGK Iridium CR9EIX

And life of copper over Iridium? And which one for 2018 Milwaukee 8 17
 

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Copper plugs actually perform better. Iridium and Platinum just last longer
Bull sheeeeeeeit.

Actually its unbelievable bullshit.

You've been reading that stuff on the internet about copper having better conductivity. Which is true, only its not the copper or the iridium that is the point of high resistance in a spark plug. It the resister built into the stem.
 

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Suggestions on which coped ones over

NGK Iridium CR9EIX

And life of copper over Iridium? And which one for 2018 Milwaukee 8 17
Copper is cheaper, Iridium last longer. For the first 4-5000 miles they will preform the same. After that the copper will fall off and the iridium will hold steady.
 
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