Spark plugs

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Nov 8, 2009 | 07:57 AM

#31

Sketz

Cruiser

Joined: Aug 2008

Posts: 181

Likes: 0

From: Territory of Tucson

I change mine every Spring along with all the oils so everything is fresh for the upcoming "riding season".

Nov 8, 2009 | 08:08 AM

#32

gilbos440rt

Road Warrior

Joined: May 2006

Posts: 1,652

Likes: 5

From: The sticks in SC

Anti-Seize on the threads as said above every time for piece of mind!

Nov 9, 2009 | 02:50 PM

#33

vindex1963

Cruiser

Joined: Aug 2009

Posts: 164

Likes: 1

From: Phoenix

Quote:

Originally Posted by bagga

i change the plugs when they don't work anymore. if it ain't broke, don't fix it.

If it ain't broke make it better.

Nov 10, 2009 | 09:28 PM

#34

cragdweller

Novice

Joined: Sep 2007

Posts: 22

Likes: 0

From: St. Louis, MO area

Non-stock plugs may disable "Anti-Knock feature

I had just installed Screemin Eagle 'standard-compression' plugs and was trying to find out if the pre-set gap of .35 was right since the standard one uses a .40 gap. I guess I got sucked in by the marketing just like I do with Harley add-on parts in general.

One site I visited was HarleyHelp.com and they suggested that the use of any plug other than the HD stock plug would disable the "Anti-Knock" feature programmed into 2005 and newer V-Twins. It had something to do with the feature being tied to reading the resistance in the plug.

I don't know if this is actually the case, but I may put my stock plugs back in just to be safe because I'm not sure if the new plugs would really be an improvement in performance anyway.

Nov 11, 2009 | 03:32 AM

#35

BadPiggy

Outstanding HDF Member

Joined: Jul 2007

Posts: 3,410

Likes: 8

From: Knoxville, TN

Quote:

Originally Posted by vindex1963

Google it and get ready for hours of pro-con reading. They stopped the ping in my motor going to a colder heat range.

You gotta plug brand & part number?

Nov 11, 2009 | 10:07 AM

#36

cragdweller

Novice

Joined: Sep 2007

Posts: 22

Likes: 0

From: St. Louis, MO area

Follow-up to:"Non-stock plugs may disable "Anti-Knock feature

I followed up with HD and they said that the comment about eliminating the anti-knock feature on the HarleyHelp.com site was not correct. Any HD plug that fits the app will work with the plug sensing that deals with anti-knock in the ECM. Other brands may be ok too, but they only test the HD plugs and can't verify other brands.I installed 32192-10 Screemin Eagle plugs for standard compression.They said the SE plug was overkill for my app (but wouldn't hurt anything) and that the cheaper 6R12PP platinum plugs would last just as long without fouling.

Nov 11, 2009 | 02:52 PM

#37

vindex1963

Cruiser

Joined: Aug 2009

Posts: 164

Likes: 1

From: Phoenix

Quote:

Originally Posted by BadPiggy

You gotta plug brand & part number?

DCPR8EIX NGK Iridium plugs

Nov 11, 2009 | 04:07 PM

#38

nvsteve

Seasoned HDF Member

Joined: Oct 2006

Posts: 5,977

Likes: 85

From: Nevada

I have the DCPR8EIX NGK Iridium plugs in mine and they workd fine. No noticeable difference in performance. Other than lasting a little longer the standard DCPR8 is probably fine.