Iridium spark plugs installation question - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 11 (permalink) Old 02-06-2015, 09:55 PM Thread Starter
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Iridium spark plugs installation question

I just got the new iridium spark plugs that y'all recommend on this forum, but they have a threaded female end, while my old ones had the same size threaded male connection. The spark plug leads are female but not threaded.

I was thinking of just cutting the ends off of my old ones and fitting them halfway into the new plugs so they'd stick out and fit into the leads as well; Would there be potential for them to fall out if I did this? Should I find this threading made out of conductive material? What's the 'right' thing to do?
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post #2 of 11 (permalink) Old 02-06-2015, 10:09 PM
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Take them back to where you got them. Some one gave you the wrong plugs. Take an old plug to show them. All standard plugs for these bikes come with the stub for the plug wiring cap. Also, never touch the porcelain part on the plug. The electrical firing voltage will go to the nearest ground. It will travel the oils and dirt left behind from your fingers as well as the center electrode.


NOTE: are you talking about there being a metal stem coming out of the porcelain about a 1/2 inch long and you can see threads down inside just alittle? If so the plug is ok. The tips are removable for other applications and they just thread the whole way through the barrel.

Last edited by Chuck A.; 02-06-2015 at 10:19 PM.
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post #3 of 11 (permalink) Old 02-07-2015, 08:15 AM
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the plugs in question always come that way just unscrew the tip and install the plug without the tip

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post #4 of 11 (permalink) Old 02-07-2015, 01:59 PM
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the plugs in question always come that way just unscrew the tip and install the plug without the tip
yesss don't cut anything, you can just unscrew the tip and they'll look the same as your old plugs!

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post #5 of 11 (permalink) Old 02-22-2015, 05:09 PM Thread Starter
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Forgot to post back, yep. the end unscrews. Total noob question. Thanks everybody.
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post #6 of 11 (permalink) Old 02-22-2015, 05:40 PM
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Also, never touch the porcelain part on the plug. The electrical firing voltage will go to the nearest ground. It will travel the oils and dirt left behind from your fingers as well as the center electrode.
Don't mean to sound like a **** when I say this, but I've been around gas powered stuff since i was 5 and have never heard this. Have you ever actually seen this be a failure point?

like i said i'm not being a **** at all but seriously curious

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post #7 of 11 (permalink) Old 02-22-2015, 06:33 PM
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Well if it makes any difference,,,,, yes I have. I'm a certified auto mechanic and still own a portion of a mechanic shop (600 feet from my house)with my brother who is a master mechanic and still runs it. I did burn out on wrenching though. So touch away if you want. The engine will still run, you may get a misfire at higher RPM's though. Just friendly advice.
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post #8 of 11 (permalink) Old 02-25-2015, 01:20 AM
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Well if it makes any difference,,,,, yes I have. I'm a certified auto mechanic and still own a portion of a mechanic shop (600 feet from my house)with my brother who is a master mechanic and still runs it. I did burn out on wrenching though. So touch away if you want. The engine will still run, you may get a misfire at higher RPM's though. Just friendly advice.
huh, go figure. lol guess there is always something to learn. Like I said wasn't wanting to be a **** but was genuinely curious about that. Sooo many people throw stuff around on the internet because they read it somewhere or jim bob told them this or that. I always try to make sure it's personal experience. And I hear ya on the burned out on wrenching though. I did it for a year and found that while I love doing it for myself and friends on stuff I find interesting, I really hate working on other peoples crap that they just don't care about.

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post #9 of 11 (permalink) Old 02-25-2015, 08:10 AM
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Seems like the fuel would wash away any oil....or the heat would burn it off.

Not sure how easy it be to actually touch the porcelain to begin with, and not sure why you'd even do so if the plugs come already gapped.

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post #10 of 11 (permalink) Old 02-25-2015, 09:01 AM
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Seems like the fuel would wash away any oil....or the heat would burn it off.

Not sure how easy it be to actually touch the porcelain to begin with, and not sure why you'd even do so if the plugs come already gapped.
He is referring to the porcelain on the outside of the plug. Which I think that might be one of the reasons they recommend putting dielectric grease on that area of the plug.
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