Spark Plug Question
#1
02-11-2011, 06:35 PM
Join Date: Sep 2009
Location: South MS.
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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.
#2
02-11-2011, 06:40 PM
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.
#3
02-11-2011, 06:49 PM
Road Master
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.
#5
02-12-2011, 03:52 AM
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.
#6
02-12-2011, 04:51 AM
#7
02-12-2011, 05:05 AM
Seasoned HDF Member
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#8
02-12-2011, 06:50 AM
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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