Spark Plug Question
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Joined: Sep 2009
Posts: 82
Likes: 0
From: South MS.
Spark Plug Question
I tried the search option first but it wouldn't work for me.
What kind of spark plugs do you guys like the best ? I guess the standard HD plug for your bike is good enough but you never really know if you dont try something different. I was going to change my plugs on my 09 Dyna FXD and I was wondering what other guys like.
What kind of spark plugs do you guys like the best ? I guess the standard HD plug for your bike is good enough but you never really know if you dont try something different. I was going to change my plugs on my 09 Dyna FXD and I was wondering what other guys like.
Road Master
Joined: Mar 2008
Posts: 911
Likes: 3
From: Venice, FL
I tried the search option first but it wouldn't work for me.
What kind of spark plugs do you guys like the best ? I guess the standard HD plug for your bike is good enough but you never really know if you dont try something different. I was going to change my plugs on my 09 Dyna FXD and I was wondering what other guys like.
What kind of spark plugs do you guys like the best ? I guess the standard HD plug for your bike is good enough but you never really know if you dont try something different. I was going to change my plugs on my 09 Dyna FXD and I was wondering what other guys like.
At the parts counter at my dealer there was a tech buying parts for his own bike. I asked him if the "Gold" "Platinum" or "SE" plugs were any better or worth the extra $$$. He said "don't waste your money on those". "Just run the stock 6R12s and you'll be fine".
I took his advice.
Road Master
Joined: Nov 2006
Posts: 1,164
Likes: 401
From: Port Coquitlam B.C.
A lot of good information here
http://www.harleyhelp.com/sparkplg.html
I've been using NGK's and like them.
http://www.harleyhelp.com/sparkplg.html
I've been using NGK's and like them.
Road Warrior
Joined: Apr 2010
Posts: 1,739
Likes: 10
From: Suffolk, England
Just a word of caution...
All the late model BTs use an ion-sensing system for knock detection. This consists of measuring changes in resistance of the circuit through the spark plugs. Alter this circuit by switching to non-stock plugs and you can mess this up; either disabling the anti-knock altogether or possibly risk having your ignition permanently retarded.
Oh - and most expensive spark plugs are snake oil that gear-heads have been falling for for years and will make zero difference to how a Harley engine runs.
All the late model BTs use an ion-sensing system for knock detection. This consists of measuring changes in resistance of the circuit through the spark plugs. Alter this circuit by switching to non-stock plugs and you can mess this up; either disabling the anti-knock altogether or possibly risk having your ignition permanently retarded.
Oh - and most expensive spark plugs are snake oil that gear-heads have been falling for for years and will make zero difference to how a Harley engine runs.
Intermediate
Joined: Aug 2010
Posts: 36
Likes: 15
From: VIC, Australia
I fitted the new SE plugs with the mushroom head insulator (less fouling ?).
# 32186-10 (for high comp) No complaints, not sure they are worth the extra,
but they would prob' last a bit longer.
# 32186-10 (for high comp) No complaints, not sure they are worth the extra,
but they would prob' last a bit longer.
Seasoned HDF Member
Joined: Nov 2010
Posts: 17,547
Likes: 7,153
From: Oxford, Nc
Autolite 4164's, Adjusted at 5,000, replaced at 10,000. Never a porblem and 2 bucks a piece.
'00 FLTRSEI 83,000 miles
'00 FLTRSEI 83,000 miles
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Road Warrior
Joined: Dec 2010
Posts: 1,629
Likes: 46
From: East Hartford, CT
I used Nology silver plugs on my XL1200C and after 10,000 miles they looked brand new. Amazing I thought.
However I did have this high idle problem at times mostly when I would come down from higher elevations and it would run high idle till I just let it calm down at a stop.
After gettIng a code I temporary rid the problem by cleaning my crankcase position sensor but after a couple weeks it would return.
I traded in the bike with 18.000 fast and furious miles.
I may stay with the stock plugs this time.
However I did have this high idle problem at times mostly when I would come down from higher elevations and it would run high idle till I just let it calm down at a stop.
After gettIng a code I temporary rid the problem by cleaning my crankcase position sensor but after a couple weeks it would return.
I traded in the bike with 18.000 fast and furious miles.
I may stay with the stock plugs this time.
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