Harley Davidson Forums

Touring Models Road King, Road King Custom, Road King Classic, Road Glide, Street Glide, Electra Glide, Electra Glide Classic, and Electra Glide Ultra Classic bikes.
Sponsored by:
Sponsored by:

How do you regap a Iridium Spark plug?

Thread Tools
 
Search this Thread
 
Old May 4, 2011 | 01:42 AM
Share
  #1  
jackhis's Avatar
jackhis
Thread Starter
|
Road Warrior
Joined: May 2010
Posts: 1,294
Likes: 1
From: South FL
Default How do you regap a Iridium Spark plug?
I know this is so amateur question, but I have never done this before, and I really don't want to damage the "very tiny" head of this spark plug.
So, what is the best way to regap without damage the plug? Tools?
Thanks much in advanced!
Nick
 
Reply
0
Old May 4, 2011 | 02:58 AM
Share
  #2  
emwolb's Avatar
emwolb
Ultimate HDF Member
Joined: Aug 2008
Posts: 5,413
Likes: 17
From: eastern oklahoma
Default
i don't think you can re gap them. that's why most guys are using autolite or harley plugs. they work just fine and are a whole lot cheaper than the iridiums.
 
Reply
0
Old May 4, 2011 | 03:35 AM
Share
  #3  
8blkfxdb's Avatar
8blkfxdb
Advanced
Joined: Feb 2011
Posts: 84
Likes: 0
From: Northwest Arkansas
Default
Buy a new one you cheap ***! You only need two! Just check before you leave the parts house and make sure its right...
 
Reply
0
Old May 4, 2011 | 05:44 AM
Share
  #4  
dohadex's Avatar
dohadex
Road Captain
Joined: Sep 2009
Posts: 718
Likes: 1
From: Panama City, FL
Exclamation Whaaaaaaat?
Originally Posted by 8blkfxdb
Buy a new one you cheap ***! You only need two! Just check before you leave the parts house and make sure its right...
You NEVER re-gap Iridium plugs! They will last a minimum of 25k miles. Put them back in and ride!
 
Reply
0
Old May 4, 2011 | 06:19 AM
Share
  #5  
jackhis's Avatar
jackhis
Thread Starter
|
Road Warrior
Joined: May 2010
Posts: 1,294
Likes: 1
From: South FL
Default
Originally Posted by 8blkfxdb
Buy a new one you cheap ***! You only need two! Just check before you leave the parts house and make sure its right...
That's how you assume everything with your little brain!
How do you know these are used, and how do you know that they are in spec.?
I just recheck my OEM spark plugs, and they are less than 0.034" which is way out off spec, and they are just 12K miles old. Go figure!

Originally Posted by dohadex
You NEVER re-gap Iridium plugs! They will last a minimum of 25k miles. Put them back in and ride!
Don't assume that they are old, when I say "regap".
The manufacturer has already gapped the plugs, but just in case they are out of spec., then what!
 
Reply
0
Old May 4, 2011 | 07:13 AM
Share
  #6  
nvsteve's Avatar
nvsteve
Seasoned HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Oct 2006
Posts: 5,977
Likes: 85
From: Nevada
Default
Use a side gap tool that does not contact the electrode.
 
Reply
0
Old May 4, 2011 | 07:24 AM
Share
  #7  
coolerman69's Avatar
coolerman69
Road Warrior
Joined: Aug 2010
Posts: 1,788
Likes: 5
From: Tennessee
Default
I've been told by more than one wrench not to use those plugs.
 
Reply
0

Trending Topics

Old May 4, 2011 | 07:52 AM
Share
  #8  
RollaMo's Avatar
RollaMo
Grand HDF Member
15 Year Member
Liked
Community Favorite
Top Answer: 1
Joined: May 2008
Posts: 4,585
Likes: 673
From: Rolla
Default
Originally Posted by nvsteve
Use a side gap tool that does not contact the electrode.
Out of all the responses to this thread, this is the actual answer to the question being asked.

 
Reply
1
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-1

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-2

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-4

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-5

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-6

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-7

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-8

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-9

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
Old May 4, 2011 | 07:57 AM
Share
  #9  
JayStronghawk's Avatar
JayStronghawk
Ultimate HDF Member
Joined: Dec 2007
Posts: 9,254
Likes: 283
From: Lake City, Florida (Native)
Default
Side gap tool and Feeler Gauge Most iridiums come with around a .035 Gap so is easy to expand a little with a Feeler .. be gentle and take your time they are too damn expensive to screw it up
 
Reply
0
Old May 4, 2011 | 09:26 AM
Share
  #10  
The Q's Avatar
The Q
Road Warrior
15 Year Member
Photogenic
Liked
Loved
Joined: Sep 2008
Posts: 1,420
Likes: 61
From: South Texas
Default
I check and gap my NGK iridium plugs just like a stock plug with a spark plug wire type gap tool. Just becareful about the tip of the plug.
 
Reply
0



Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 05:44 PM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE