Spark plugs
Spark plugs
Stellar HDF Member
Joined: May 2005
Posts: 2,137
Likes: 17
From:
I question how good the iridium plugs really are. I changed from regular NGK plugs to one range colder iridium after reading the article in Thunder Press about doing so with virtually any engine modification (I have an EV13 cam and free-flowing intake and exhaust). I experienced about a ten percent loss in fuel mileage on a 2000 mile trip. After going back to the standard NGK's for a 1400 mile trip, my fuel mileage returned to normal, which is an average of 49-51mpg on the highway. Nothing else was changed, other than the oil.
I like the NGK's because they seem more resistant to fouling when riding in changing elevations out west.
I like the NGK's because they seem more resistant to fouling when riding in changing elevations out west.
Road Warrior
Joined: Oct 2006
Posts: 1,830
Likes: 8
From: Retired and living in the mountains of NE PA
Unless you're spraying nitrous or running a boosted engine, there's no reason to go one range colder on your plugs. Try the NGK iridium plugs in the normal range, and I think you'll be pleasantly surprised.
Thats what I have run for the past 5 years on HD's and for a while before that on other makes of mc.
run as good as any other plug out there.
run as good as any other plug out there.
Road Warrior
Joined: Nov 2007
Posts: 1,984
Likes: 7
In the old days spark plugs were a big deal cause they fouled so bad. Was sulphur and lead in the gas. Had to change regullary.
Today a good name brand plug, maybe platium if you want to, will do the job.
I have run Iridum and they seemed just like the others. A spark is a spark.
Today a good name brand plug, maybe platium if you want to, will do the job.
I have run Iridum and they seemed just like the others. A spark is a spark.
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Ultimate HDF Member
Joined: Feb 2007
Posts: 7,663
Likes: 7
From: Northeast Ohio
In the old days spark plugs were a big deal cause they fouled so bad. Was sulphur and lead in the gas. Had to change regullary.
Today a good name brand plug, maybe platium if you want to, will do the job.
I have run Iridum and they seemed just like the others. A spark is a spark.
Today a good name brand plug, maybe platium if you want to, will do the job.
I have run Iridum and they seemed just like the others. A spark is a spark.
I do run Autolite, direct replacement for the stock plugs that came in the bike, even though it is 120" and 10.5:1 compression. Runs just fine. The high end (and high $) plugs are a scam for street use.
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