Spark Plugs
Outstanding HDF Member
Joined: Mar 2007
Posts: 2,032
Likes: 9
From: Alabama
RE: Spark Plugs
ORIGINAL: 07SG
IMO plat/irid plugs are only better for longer life of the plug, not performance gains. As simple as it is to change plugs in our scoots, it is just not worth the expense.
IMO plat/irid plugs are only better for longer life of the plug, not performance gains. As simple as it is to change plugs in our scoots, it is just not worth the expense.
Road Warrior
Joined: Feb 2005
Posts: 1,296
Likes: 1
From:
RE: Spark Plugs
Master mechanic at our dealership will only use stock plugs - other plugs make trouble - even HD's own premium plugs have made problems. Might be fun to experiment though. 
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Road Captain
Joined: Dec 2006
Posts: 635
Likes: 0
From: In Wisconsin somewhere south of Wausau.
RE: Spark Plugs
I've been using NGK Iridium plugs since my first plug change and have been very happy with them,their performance and longevity...
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Stellar HDF Member
Joined: Feb 2007
Posts: 2,558
Likes: 280
From: Russellville, Arkansas
RE: Spark Plugs
I've ridden a few Panheads, lots of Shovels, tons of EVO's, and few Twin Cams......I've found no difference between sparkplugs or even brands for that matter.
I recommend either the standard OEM plug or a cross-reference plug. If the cross-referenced plug is identical to the OEM plug....then it is fine to use. The OEM plug is manufactured by Champion for those that don't know.
A spark plug does nothing other than create the spark that is needed for combustion.
I recommend either the standard OEM plug or a cross-reference plug. If the cross-referenced plug is identical to the OEM plug....then it is fine to use. The OEM plug is manufactured by Champion for those that don't know.
A spark plug does nothing other than create the spark that is needed for combustion.
Cruiser
Joined: Jun 2007
Posts: 150
Likes: 0
From:
RE: Spark Plugs
I figured that the OEM plugs from HD were Champion, that's why I do not use them. I have had problems with Chumpion plugs in my car and in my Harley.
Used Motorcraft, Autolite and Bosh. No problems with any of them. Just installed a pair of ACs in my 98 Classic. Working good so far....
Used Motorcraft, Autolite and Bosh. No problems with any of them. Just installed a pair of ACs in my 98 Classic. Working good so far....
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