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Hottest plugs?

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Old Jul 24, 2017 | 07:52 PM
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Joseph Holland
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Default Hottest plugs?
I have a 2017 Ultra Limited with the Milwaukee 8, Rinehart slip-ons, and a stage I air cleaner. What brand and the hottest plugs can I use?
 
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Old Jul 24, 2017 | 08:19 PM
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What's wrong with just using the stock plugs? Stock plugs are pretty much all you need. I run stock plugs in my modded 15 Ultra and have no issues.
 
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Old Jul 24, 2017 | 08:23 PM
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Originally Posted by Longridertx
What's wrong with just using the stock plugs? Stock plugs are pretty much all you need. I run stock plugs in my modded 15 Ultra and have no issues.
what he said. stock plugs work in 99.99% of all applications.
 
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Old Jul 24, 2017 | 08:27 PM
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OP, why do you think you need hot plugs? You might want to do a little research on plug heat ranges.
 
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Old Jul 24, 2017 | 08:37 PM
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Do yourself a favor. Stock plugs and wires.
 
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Old Jul 24, 2017 | 08:44 PM
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Originally Posted by cdonis
Do yourself a favor. Stock plugs and wires.
​​​​​​​Yessir! Outstanding advice!
 
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Old Jul 24, 2017 | 08:54 PM
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Originally Posted by Veekness
Yessir! Outstanding advice!
OK NGK plugs it is. Thanks guys.
 
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Old Jul 24, 2017 | 10:10 PM
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I'm running NGK Irodium in my '10 Ultra Limited.

After I bought the bike 2 weeks ago (22000 miles) I did an overhaul... Oil (Mobile1 VTwin), K&N Oil Filter, K&N Air Filter (Stage1), Plugs, Exhaust (Rinehart 4" Classic Duels), and DynoJet PC V
 
Last edited by rgrecco; Jul 24, 2017 at 10:15 PM.
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Old Jul 24, 2017 | 11:11 PM
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I believe there's some confusion regarding 'hottest' or 'hot' plugs. Generally, those terms refer to the 'reach' of the plug's nose. When you're having burn problems, for instance, if a plug is getting fouled by oil, you use what has become to be known as a 'hotter' plug...one with a longer nose or reach. Other knowledgeable guys feel free to chime in to elaborate or correct me, but a 'hotter' plug, in the main, isn't referring to a higher performance spark plug.

The term 'overhaul' generally refers to the rebuilding of an engine, ship, what have you, when it has become worn out and needs to be brought back to as-new...or better...condition. I've never known it to be used when describing routine maintenance or adding equipment to a vehicle.

​​​​​​​
 
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Old Jul 24, 2017 | 11:22 PM
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Most higher compression performance engines actually require cooler plugs not hotter ones...and higher octane fuel burns slower, not faster...
 
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