NGK or Autolite iridium plugs?

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Dec 2, 2009 | 09:13 AM

mjaw

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NGK or Autolite iridium plugs?

I'm gonna replace the sparkplugs on my 98' FXD soon and was going to switch from the stock Harley plugs to iridum. Which of these two are best to use?

Dec 2, 2009 | 01:59 PM

rlyons

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Joined: Mar 2008

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From: Crestview, Florida

I put the NGK iridiums in mine this time and have about 5,000 miles on them. I am getting a smoother idle and faster starts from them for sure. I think I will stick with them. Not sure if it is my imagination but I am happy with them.

Dec 2, 2009 | 02:11 PM

Dr.Hess

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From: NW AR

I've always been happy with NGK plugs. I have NGK iridiums in in both my bikes right now, plus the Esprit. I don't know anything about the Autolites.

Dec 2, 2009 | 02:54 PM

prodrag1320

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From: deland,florida

we use autolite,had alot of problems with the porcalin coming out of NGK plugs.they are being run in a nitro motor,but still,kinda scary
kirby

Dec 2, 2009 | 03:09 PM

2003Springer

Outstanding HDF Member

Joined: Oct 2009

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From: Scottsboro

never a problem with NGK.

Dec 2, 2009 | 05:03 PM

Doug S

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From: NJ

mjaw

I use Autolite coppers, they just work well and last along time. For an EVO it's 4164 or a little hotter would be 4165. I know you asked about iridium, just wondering why you want or need them?

Doug

Dec 2, 2009 | 10:59 PM

gsxrboy96

Road Warrior

Joined: Oct 2009

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i run the basic ngks in everything i own,

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Dec 3, 2009 | 08:12 AM

mjaw

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Joined: Dec 2007

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I know a few Harley owners who use the NGK plugs,and they like them. I've been using the stock Harley (Champion) plugs since I've owned the bike,about three years now. I never really had any issues with them,just looking for a possibly better performing plug. I have a Screamin' Eagle ignition. Are the NGK's better to use than the HD plugs for this ignition? Thanks for the previous replies.