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:

Spark plugs

Thread Tools
 
Search this Thread
 
Old Jan 7, 2022 | 07:24 PM
Share
  #21  
702's Avatar
702
Seasoned HDF Member
Joined: May 2018
Posts: 5,814
Likes: 7,147
From: Las Vegas
Default
E3 plugs are great if you run nitro methane. Or Amsoil.
 
Reply
0
Old Jan 7, 2022 | 07:28 PM
Share
  #22  
BackRoader's Avatar
BackRoader
Road Master
Joined: May 2008
Posts: 1,096
Likes: 107
From: Joplin, MO
Default
The iridium plugs have a hotter spark. I need that for the flux capacitor.
 
Reply
4
Old Jan 8, 2022 | 05:01 AM
Share
  #23  
eighteight's Avatar
eighteight
Seasoned HDF Member
Joined: Oct 2019
Posts: 10,804
Likes: 7,445
From: OH
Default
Originally Posted by TBL2021
I was just looking tor info on a spark plug to know if they were good plugs or not I have always ND plugs and I am not stupid or new to Harley’s so please keep the bullshit comments to your self
Sir, my post was merely poking fun at the fads and claims made by manufacturers over the years

The plug shown was later litigated by the FTC for false advertising ( note the "what ever happened to " )

Wasn`t picking on you ..

I`d apologize but I did nothing wrong
 
Reply
1
Old Jan 8, 2022 | 05:49 AM
Share
  #24  
dajogejr's Avatar
dajogejr
Road Warrior
10 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2014
Posts: 1,703
Likes: 909
From: SE Michigan
Default
Keep the bullshit comments to yourself…while asking about a BS product…
oh, the irony…

I will say this about Splitfire of old…great marketing. No performance difference…but they fielded some great MX racers back in the day with Pro Circuit headed by Mitch Payton.
Unless you’re talking about plugs for specialty engines, like airplanes, nitro Meth motors, etc., a plug is a plug.
Resistor is the only question and that won’t harm/help performance, it’s really about compatibility with modern electronics, knock sensor and radio interference.
 
Reply
1
Old Jan 9, 2022 | 12:10 PM
Share
  #25  
WVHARLEEMANN's Avatar
WVHARLEEMANN
Elite HDF Member
Joined: Feb 2020
Posts: 4,034
Likes: 847
From: In The Mountains
Default
HD plugs always for me all the way. Never an issue. 👍👍
 
Reply
0
Old Jan 9, 2022 | 12:22 PM
Share
  #26  
Grouser62's Avatar
Grouser62
Road Master
Photogenic
Liked
Loved
Community Favorite
Joined: Mar 2013
Posts: 787
Likes: 603
From: Alberta
Default
Originally Posted by TBL2021
This place is a joke
I was really enjoying the education and the banter thinking this is what it’s all about and then for some reason it just went off the rails.
 
Reply
0
Old Jan 9, 2022 | 12:43 PM
Share
  #27  
Fireball Jack's Avatar
Fireball Jack
Stellar HDF Member
10 Year Member
Liked
Loved
Community Favorite
Joined: Oct 2015
Posts: 2,681
Likes: 851
From: Puyallup, wa
Default
Since this has died, does anyone remember this old snake oil gadget from the 80's/90's?
 
Reply
3
Old Jan 9, 2022 | 02:23 PM
Share
  #28  
Bafflingbs's Avatar
Bafflingbs
Stellar HDF Member
Veteran: Navy
10 Year Member
Liked
Community Favorite
Joined: Jul 2015
Posts: 2,659
Likes: 925
From: Maryland
Default
Here ya’ go. I thought this was interesting:

Spoiler alert, Iridium plugs aren’t that much better, than regular plugs.
 
Reply
2
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 Jan 10, 2022 | 10:19 AM
Share
  #29  
FlamedFXR's Avatar
FlamedFXR
Stellar HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2009
Posts: 2,825
Likes: 2,141
From: Hope Mills NC, bye CA!!
Default
Originally Posted by hattitude
Really......??



Good luck with your spark plug mod......
It's his spark plug build....
 
Reply
1
Old Jan 10, 2022 | 10:52 AM
Share
  #30  
flh canuck's Avatar
flh canuck
Tourer
10 Year Member
Joined: Sep 2014
Posts: 279
Likes: 315
From: Southern Vancouver Island
Default
I use the stock Harley Davidson plugs. They work just fine and actually pretty reasonably priced.....
 
Reply
0



Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 12:04 AM.

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