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:

Spark Plugs

Thread Tools
 
Search this Thread
 
Old Apr 3, 2017 | 03:37 AM
  #21  
NELS's Avatar
NELS
Road Warrior
15 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2008
Posts: 1,343
Likes: 173
From: Watertown, CT
Default

Originally Posted by Mr-Mike
Dude! We're talking 2 plugs - 10 or 20 bucks total. Change the damn things already. Clean doesn't mean peak performance. Electrode is looking worn.
Ejght dollars from Harley
 
Reply
Old Apr 3, 2017 | 07:55 AM
  #22  
Mr-Mike's Avatar
Mr-Mike
Road Master
Joined: Dec 2016
Posts: 981
Likes: 182
From: Fairfax County, VA
Default

Originally Posted by NELS
Ejght dollars from Harley
Right. Plenty of cheaper options. Heck I would have sent him my 'like new' stock ones for free, but I tossed them - haha.
 
Reply
Old Apr 3, 2017 | 08:24 AM
  #23  
TheGrandPoohBah's Avatar
TheGrandPoohBah
Extreme HDF Member
Joined: Jun 2011
Posts: 14,731
Likes: 2,535
From: Mountain Top, Alabama
Default

I am no newby to the plug game.
I'm running them.
They cleaned up great.
Do as you wish on your bike, I'm riding mine.
 
Reply
Old Apr 3, 2017 | 08:25 AM
  #24  
Prologix's Avatar
Prologix
Cruiser
Joined: Jun 2016
Posts: 147
Likes: 6
From: Souderton, PA
Default

Originally Posted by Sierra977
NGK Iridium IV DPR7EIX-9 gapped 0.034. Runs fine in the 120R and appears to allow ion-sensing function as well.
Hey Sierra, what is "ion-sensing"?
 
Reply
Old Apr 3, 2017 | 08:34 AM
  #25  
Buelligan666's Avatar
Buelligan666
Grand HDF Member
10 Year Member
Joined: Aug 2014
Posts: 3,602
Likes: 1,588
From: Eastern Ohio
Default

Originally Posted by Prologix
Hey Sierra, what is "ion-sensing"?
https://www.hdforums.com/forum/engin...explained.html
 
Reply
Old Apr 3, 2017 | 08:38 AM
  #26  
DJ_WOBBLE's Avatar
DJ_WOBBLE
Tourer
Veteran: Navy
Joined: Feb 2017
Posts: 330
Likes: 67
From: California, Maryland
Default

I am running E-3 spark plugs. With my full stage one set up of an Accel Coil, Sumo 409 Wires, Cobra Intake, Cobra Exhaust, and Cobra fuel management system. It runs great.
 
Reply
Old Apr 3, 2017 | 01:53 PM
  #27  
PPearl's Avatar
PPearl
Tourer
Joined: Jan 2017
Posts: 378
Likes: 100
From: PA
Default

NGK and Screaming Eagle wires.

I thought the wires looked purdy.
 
Reply
Old Apr 3, 2017 | 03:51 PM
  #28  
target64's Avatar
target64
Stellar HDF Member
10 Year Member
Joined: Jan 2013
Posts: 2,464
Likes: 50
From: Rouses Point, N.Y.
Default

I have been running NGK DCPR8EIX 's for 5 years have not had any issues with the ION sensing system. I was told the other day from a spokesperson from NGK that in the future harley's will be using ngk plugs in all there bikes.
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-1

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-2

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

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

 Verdad Gallardo
story-4

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

 Verdad Gallardo
story-5

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-6

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-7

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-8

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
story-9

Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

 Verdad Gallardo
Old Apr 3, 2017 | 04:35 PM
  #29  
Hate Work's Avatar
Hate Work
Road Warrior
Joined: May 2015
Posts: 1,718
Likes: 159
From: Maryland
Default

Originally Posted by TriGeezer
What.,.and you didn't get 10 mpg more? You been cheated, bloke.
No. I only get an extra 7 mpg and 9 BHP. I had to take them out because the front end was lifting too much when I hit third gear.
 
Reply
Old Apr 3, 2017 | 04:45 PM
  #30  
MysticTraveler's Avatar
MysticTraveler
Road Captain
Joined: Oct 2010
Posts: 635
Likes: 29
From: Bakersfield, CA
Default

one more... standard Harley plugs.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
knights
Sportster Models
4
Mar 22, 2014 06:04 AM
CT-Bagger
Touring Models
14
Aug 17, 2011 11:30 AM
tenrams
Engine Mechanical Topics
1
Feb 5, 2011 03:40 PM
Fuzzman
General Harley Davidson Chat
10
Mar 1, 2010 11:59 AM
corona
Exhaust System Topics
5
Mar 5, 2007 08:34 PM




All times are GMT -5. The time now is 01:42 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

Slideshow: Graeme Billington's left-hand-drive Shovelhead is as much about problem-solving as it is about classic Harley form.

By Verdad Gallardo | 2025-12-30 11:27:08


VIEW MORE