Dealer said the standard 6R12 HD plugs come gapped. - Harley Davidson Forums

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Dealer said the standard 6R12 HD plugs come gapped.

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Old 10-22-2008, 07:45 PM
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Default Dealer said the standard 6R12 HD plugs come gapped.

I changed my oil/filter and switched to HD Syn. I wanted to check the plugs to see how they were burning and figured while they were out to replace them. The dealer said the standard 6R12 HD plugs come gapped so when I went to put the new ones in I couldn't find my feeler guage quickly so I just put anti-seize on threads and torqued them down.
My question is are they actually gapped at the factory to HD specs?
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Old 10-22-2008, 08:04 PM
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When i put mine in, they came gapped to 040 out of the box.
With any plug, you ought to check them before you install. Or at least look at them to see if they look like the gap is right

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Old 10-22-2008, 08:08 PM
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Originally Posted by kk6pg View Post
When i put mine in, they came gapped to 040 out of the box.
With any plug, you ought to check them before you install. Or at least look at them to see if they look like the gap is right
True, all ya have to do is drop one and it's not gapped anymore.

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Old 10-22-2008, 08:19 PM
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Not sure I would trust them gapped correctly

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Old 10-22-2008, 08:34 PM
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Default plugs

they are supposed to be gapped but in shipping and possibly being dropped a few times i would check them any way

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Old 10-22-2008, 08:56 PM
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It's to easy not to check
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Old 10-22-2008, 08:56 PM
seniorsuperglideE8 seniorsuperglideE8 is offline
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+1 on the plugs being gapped correctly in the box, but I always check prior to installation.
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Old 10-23-2008, 12:00 AM
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As an auto mechanic for the last 29 yrs., I would never install a plug without checking the gap. I have seen hundreds of "gapped" plugs that were at the wrong gap.
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Old 10-23-2008, 02:14 AM
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I just had my 10,000 mile service at Harley Davidson of Long Branch in New Jersey. Spark plugs were replaced. On the ride home, my engine started knocking/pinging like crazy. One of the things I checked were the spark plugs. The professional mechanics had (a) only put them in just slightly tighter than finger tight, and (b) not gapped them - they were at .045 and should have been between .038 - .043. Always check the spark plug gap. The "factory gapping" myth is just that - myth.

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Old 10-23-2008, 08:23 AM
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After being a mechanic for over 48 years and riding bikes for over forty years (boy that really dates me !), anyway, I've seen many companies that state that their plugs are already gapped. But as others have said, it is much better to be safe than sorry - always check the gap before installing plugs !!!! Enough said ..... ;-)
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