Screamin' Eagle Spark Plugs - 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:

Screamin' Eagle Spark Plugs

Thread Tools Search this Thread
Old 10-13-2012, 01:52 PM
highwayking highwayking is offline
One Of The Regulars
Thread Starter
Join Date: May 2006
Location: Charlotte, NC
Posts: 287
Thanks: 0
Thanked 4 Times in 3 Posts
Default Screamin' Eagle Spark Plugs

Stock spark plugs = $4 each.
SE spark plugs = $8 each.
Are they really twice as much better? Why would anyone buy the SE ones if they have a stock bike? I ask this because when I went to the dealership to buy new ones, the parts guy tried to sell me the SE type. I know his reason to push them--more $ for the company. When I asked why I should buy them instead of stock he said they "make a cleaner burn". I opted for the stock plugs that I have now.
Reply With Quote
Old 10-13-2012, 01:55 PM
mkguitar mkguitar is offline
Extreme HDF Member
Join Date: Sep 2010
Location: Phoenix '53, '88, '09 Big Twins
Posts: 14,413
Thanked 273 Times in 235 Posts

well done.

I would have asked him for documentation.

if that were true HD would offer these OEM to get the tailpipe emission levels down*.

this would allow them more leeway in the fuel injection mapping

while most areas do not test bikes for emissions ( we do), H-D has to certify emission compliance with the EPA, CARB and other regulatory bodies Domestic and Foreign.

with that in mind I say BS to your parts guy.


* the same rational applies to splitfire and other gee-gaws...if they really added power, MPG or reduced emissions, GM and Ford would love to advertise the extra power in their sales ads, or the decreased emissions, or the better CAFE rating.

much of the advertising done is vs worn out components swapped with new--- it was over a test like that where a bike mag claimed 15% more power with special plug wires that I dropped my subscription.

the "after" dyno run showed stock numbers...the before was about...15% lower than it should

Last edited by mkguitar; 10-13-2012 at 01:59 PM.
Reply With Quote
Old 10-13-2012, 02:09 PM
alysonowner's Avatar
alysonowner alysonowner is offline
New Member
Join Date: Apr 2009
Location: colorado
Posts: 65
Thanks: 0
Thanked 0 Times in 0 Posts

I change my plugs seasonally. Put between 12-15k a year on the bike. The stockers work just fine. Just pull them out at each service. As long as they're a nice tan color with no oil or burn marks you've got smooth combustion in the cylinders and the plug is doing its job just fine. otoh I run double platinum plugs in my truck but it works a lot harder than the bike and goes 60,000 between plug changes. It's similar to the dino vs synthetic debate. If you're changing them regularly it doesn't really matter.
Reply With Quote
Old 10-13-2012, 02:48 PM
Retrop Retrop is offline
Road Warrior
Join Date: Nov 2008
Posts: 1,642
Thanks: 0
Thanked 7 Times in 7 Posts

High performance and specialty plugs are another marketing ploy to confuse the average consumer. Like most advertising, they make wild claims which they don't have to back up and are hard to substantiate.
Save your money and stick with OEM sparkplugs. It is just a sparker.

"But wait, if you act right now, we will send you two magic ***** butt plugs instead of one-All you have to do is pay seperate shipping and handling". I can't help but to laugh when I see those TV ads.
Reply With Quote
Old 10-13-2012, 04:13 PM
blue flht's Avatar
blue flht blue flht is offline
Senior Rider
Join Date: Nov 2010
Location: huntersville nc
Posts: 374
Thanked 12 Times in 6 Posts

What they are saying is right, just use the stock ones and save your money.
Reply With Quote
Old 10-13-2012, 05:04 PM
Ohiobellboy's Avatar
Ohiobellboy Ohiobellboy is offline
Road Warrior
Join Date: Jan 2010
Location: Canton, Ohio
Posts: 1,555
Thanked 7 Times in 7 Posts

FWIW, When I took mine in for it's 10k service, I went to the parts counter to get new plugs to put in myself. They sold me the $4 plugs for my CVO. It's what the book called for. Go figure. As others have said as a result of my purchase, I'd stick with the stock plugs.
Reply With Quote
Old 10-13-2012, 06:38 PM
bigheadted's Avatar
bigheadted bigheadted is offline
Outstanding HDF Member
Join Date: Feb 2007
Location: Northern California
Posts: 2,921
Thanked 22 Times in 22 Posts

I tried them and it cured the decel popping, got better MPG by about 10 and started easier, it also help with the Bagger Wag and my tires last over 20k now.Seriously though I fell for it and bought them for may last bike which had a 95 inch motor and made nice power. I think it might have started easier but could not tell any difference in how it ran. Probably wasted the money. I also bought them for the bike I have now because they look cooler than the stock ones!

Last edited by bigheadted; 01-05-2013 at 01:27 PM. Reason: wanted to add real info not a smart alek reply.
Reply With Quote
Old 10-13-2012, 07:29 PM
Pastor Ed's Avatar
Pastor Ed Pastor Ed is offline
Senior Rider
Join Date: Sep 2012
Location: SW Iowa
Posts: 322
Thanks: 0
Thanked 0 Times in 0 Posts

Here is what HD says: "Designed for modified engines including performance carburetors, high-flow air cleaners, cam shafts, exhaust systems and ignition systems in conjunction with stock compression ratios."
You might want to mention this to your parts person.
Reply With Quote
Old 10-13-2012, 07:55 PM
bigskyroadglide's Avatar
bigskyroadglide bigskyroadglide is offline
Road Warrior
Join Date: Sep 2010
Location: Mountain West, Big Sky Country
Posts: 1,941
Thanked 48 Times in 43 Posts

i buy autolites at auto zone or advance for $1.44 a piece and have no issues with how the bike performs. Why, you ask, the bike does not know what type of plug is installed, it just knows it fires.

my .02
Reply With Quote
Old 10-13-2012, 08:26 PM
IncognitoProducts IncognitoProducts is offline
Join Date: Aug 2012
Location: Dallas, TX
Posts: 408
Thanks: 0
Thanked 0 Times in 0 Posts

Originally Posted by bigskyroadglide View Post
i buy autolites at auto zone or advance for $1.44 a piece and have no issues with how the bike performs. Why, you ask, the bike does not know what type of plug is installed, it just knows it fires.

my .02
Please take a look at this video...

Pulstar Pulse Plugs (Iridium) VS NGK Iridium Spark-Plug bench test... You Decide. - Every Spark-plug on the market today is ONLY capable of discharging a maximum of 50 watts to ignite fuel. And Power Ignites Fuel! The Pulstar Pulse Plug has an internal capacitor, that captures the power normally wasted by Spark-plugs, using it to ignite the fuel charge. Both plugs ARE the same heat range, the Pulstar plug does NOT produce a hotter spark. It produces a larger spark with more surface area, creating a larger Flame Kernel that burns fuel sooner. Extracting more power from every fuel charge. A good example is...the Spark-plug is a flash light, and the pulse plug is the camera flash. Even though they both can use the same power supply, 2 AA batteries. The camera flash is many times brighter & larger even though it does not last very long. The same is true of the ignition source from the Pulse your engine 1 Million watts only needs to last for 2 billionth of a second. Enough time to ignite fuel, but brief enough to NOT over heat vital engine components. The Pulstar Pulse Plug...will NOT harm your engine.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Spar Plug Wire Replacement peddler Touring Models 8 09-20-2013 06:34 PM
What color are your spark plug ceramics? jimski Touring Models 5 05-20-2012 08:57 AM
Screamin Eagle spark plug wires black05sunshine Dyna Glide Models 22 09-26-2011 10:06 AM
Frozen Spark Plugs Stubby3492 General Harley Davidson Chat 40 10-05-2010 05:04 PM
Spark plugs wildhog7 Touring Models 37 11-11-2009 04:07 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -5. The time now is 07:14 PM.

  • Ask a Question
    Get answers from community experts
What's your question?