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Old 07-15-2009, 10:24 AM   #1
just sayin
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Question Standard vs. Iridium Plugs

So it I am buying new plugs for my bike and trying to determine if I should get the standard or iriduim - I understand the iridium plugs burn more gas and are used more for racing etc - obviously I wont be doing that since I just have a little 500 but I do want to get the most out of my bike that I can/do whats best for the bike... btw, the price diff. is like $2.99 vs. $10.99 or something like that. Any comments?
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Old 07-15-2009, 10:29 AM   #2
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I would stick with what came in your Ninja. Jus my .02
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Old 07-15-2009, 10:51 AM   #3
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Standard copper core NGK's FTW
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Old 07-15-2009, 10:55 AM   #4
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ok so standard it is then... would the iridium ones be used if I had a track bike? just curious
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Old 07-15-2009, 10:57 AM   #5
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I don't use them in my race bike.
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Old 07-15-2009, 11:11 AM   #6
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so what are they used for? is it just a overpriced spark plug?
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Old 07-15-2009, 10:35 PM   #7
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You cant really say they burn more gas. There is the same amount of fuel either way. They may burn better though. I have seen them tested on tv. They dynoed on a 350 at +2 hp. That means you wouldnt notice a thing on a bike.
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Old 07-15-2009, 11:01 PM   #8
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Some bikes require them because of their ignition systems.
Yours does not. As such, stay with the standard NGKs.
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Old 07-23-2009, 03:44 PM   #9
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Old 07-23-2009, 03:52 PM   #10
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Old 07-26-2009, 03:49 PM   #11
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Iridiums last longer thats about it. If your bike requires you to change the spark plugs at some mileage, I would follow it and change it regardless if its regular or iridium. So, there is no sense in spend the extra 4 bucks. Stick to what the manual says and get standard oem spark plugs.
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Old 08-03-2009, 11:54 AM   #12
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Iridiums have much longer replacement intervals and have their uses in high compression and/or forced induction engines. However, if your bike didn't come with them, the only advantage to you is longer replacement intervals.
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Old 08-03-2009, 12:06 PM   #13
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i've always been under the impression that copper is a better conductor either way. less mileage but better spark.
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Old 08-03-2009, 12:40 PM   #14
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iridium

Electrical properties
Electrical Type Conductor
Electrical Conductivity 2.1107 S/m
Resistivity 4.710-8 m Ω
Superconducting Point 0.11

http://www.periodictable.com/Elements/077/data.html


Copper

Electrical properties
Electrical Type Conductor
Electrical Conductivity 5.9107 S/m
Resistivity 1.710-8 m Ω
Superconducting Point N/A

http://www.periodictable.com/Elements/029/data.html

As you can see here Iridium is a far better conductor, but unlikely you will see any real results in burn performance at the voltages and fuel usages in your bike other than iridium burning a bigger hole in your wallet...
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Old 08-23-2009, 09:40 PM   #15
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theres no negative affect to using the iridium plugs except them being a few dollars more per plug.. like a few others said the iridium plugs last longer so thats the benefit.. YOU will probably not notice the difference in the two besides the interval cycle being longer for the iridiums..
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Old 09-12-2009, 09:09 AM   #16
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Old 10-12-2009, 10:40 AM   #17
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Do iridiums have different effects on carb engines? I changed over to iridium plugs on my 4 wheeler and it was a nigh and day difference. Engines cold starts much much easier, and engine response is also much better. The previous plug only had 2 rides on it wasn't bad. I was planning on putting them on the bike but its FI.
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