SPARK PLUGS
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
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From: Baton Rouge, LA
RE: SPARK PLUGS
Last summer I switched to Autolite 4163, one heat range colder than stock, and have been running them ever since. Stock is 4164. No problems at all and the ion-discharge knock sensor appears to be working properly with these plugs. These were much cheaper than the HD-branded plugs, and be purchased at Auto Zone and other auto-parts franchises. Other good brands include Denso, NGK, etc.
Seasoned HDF Member
Joined: Jun 2006
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From: Vermont
Road Warrior
Joined: Dec 2006
Posts: 1,548
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From: Mt. Airy, MD
RE: SPARK PLUGS
ORIGINAL: langlois1
I KNOW SOMEONE WILL BE ABLE TO ANSWER THIS QUESTION. WHICH IS WHEN CHANGEING SPARK PLUGS DO YOU HAVE TO USE HARLEY BRAND?
I KNOW SOMEONE WILL BE ABLE TO ANSWER THIS QUESTION. WHICH IS WHEN CHANGEING SPARK PLUGS DO YOU HAVE TO USE HARLEY BRAND?
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Joined: Oct 2007
Posts: 55
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From: Royston, BC
RE: SPARK PLUGS
ORIGINAL: langlois1
DO YOU HAVE TO USE HARLEY BRAND?
DO YOU HAVE TO USE HARLEY BRAND?
"A small voltage is applied across the plug electrodes during while the power and exhaust phases of the cylinder are in progress." Ref: Adam Wade Motorcycle Fuel injection pp. 61
I'm not sure if substitute plugs will have the same resistance values as the HD plugs.
Gary
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Joined: Feb 2008
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RE: SPARK PLUGS
No you can use any brand you want just make sure it is the correct heat range.
That said the standaed HD plugs are fine.
those fancy 2 or 3 times the cost Platium plated extra specila BS plugs do nothing more than last a bit longer and if you change your plugs as you should there is no reason to use them.
Other than it may make you feel good.
NO spark plugs with 4 contacts do not burn fuel better and indexing is a joke
That said the standaed HD plugs are fine.
those fancy 2 or 3 times the cost Platium plated extra specila BS plugs do nothing more than last a bit longer and if you change your plugs as you should there is no reason to use them.
Other than it may make you feel good.
NO spark plugs with 4 contacts do not burn fuel better and indexing is a joke
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caperss396
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Dec 1, 2006 10:04 PM
