Gapping NGK CR8EIX plugs? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 11 Old 04-15-2019, 05:29 PM Thread Starter
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Gapping NGK CR8EIX plugs?

The manual for my 2002 V-strom doesn't even mention these plugs though clearly they can be used now...it only recommends the CR8EK and there is a gap check/adjustment procedure shown for those plugs.

My question is do the iridium plugs need to be gapped? On the box there is a picture showing a plug being gapped with a red X through it as if to say "do not gap these plugs" but no text to confirm.

My thoughts are it's pre-gapped from the factory but just thought I would confirm.
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post #2 of 11 Old 04-15-2019, 06:36 PM
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it's good to check the gap before installing plugs. It certainly can't hurt.
i suppose whatever the original plugs were set is appropriate.

This post has been relegated to false/fake news. Posted by one who has learned mo bettah!

Last edited by notacop; 04-17-2019 at 10:22 AM.
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post #3 of 11 Old 04-15-2019, 07:04 PM
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Every iridium plug I've ever seen is pre gapped. More than likely you would damage the electrode by gapping it.
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post #4 of 11 Old 04-15-2019, 09:25 PM
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They come pre gapped. The electrode is thin so be careful when you check the gap. If you just pop a wire gauge in there you can damage it.

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post #5 of 11 Old 04-15-2019, 09:51 PM
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The manual for my '12 Wee specifically said NOT to gap the Iridium plugs.

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post #6 of 11 Old 04-16-2019, 12:56 AM
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Originally Posted by Jim Baldwin View Post
My question is do the iridium plugs need to be gapped? On the box there is a picture showing a plug being gapped with a red X through it as if to say "do not gap these plugs" but no text to confirm.
When you see a red circle with a 45 degree red line through an image, it means do not do this, so yes, do not attempt to gap them.

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post #7 of 11 Old 04-16-2019, 07:53 AM
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VERY EASY to destroy the iridium electrode! Most don't have the tools to correctly gap, and would probably do damage just checking the gap, of these spark plugs.

Unless the plug has already been damaged by hitting it on something leave them alone. These plugs can and will fire gaps that other plugs will not, so gap is not as critical.

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post #8 of 11 Old 04-16-2019, 08:20 AM
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Leave them alone! It can indeed hurt to just check them.

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post #9 of 11 Old 04-16-2019, 04:16 PM
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Agreed, don't go sticking your grubby gap tools in there. Iridium plugs are especially vulnerable, but I've seen platinum and standard plugs damaged by egregious gappery too.

Eyeball each plug to make sure it hasn't been dropped on its head, and screw it in.

For that matter, every NGK plug I've ever used has come from the factory with the correct gap. I haven't gapped a plug or even bothered to check in aeons. Eyeball and install.
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post #10 of 11 Old 04-17-2019, 07:11 AM
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I have never gapped an iridium plug. Run them in all 3 of my current bikes, ran them in my last 2 bikes (older Venture & yamaha 850 special)....
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