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Spark plug assessment

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Old Jul 24, 2022 | 12:54 PM
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Fxdeez_'s Avatar
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Default Spark plug assessment
I have a 2000 FXD 88tc w/ mikuni 42 and thunder header it possibly has after market cams from the sound of it. I recently changed my plugs and after going on a 80 mile ride my plugs look black. Am I running rich ? What jets should I run ? Any suggestions or knowledge.


 
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Old Jul 24, 2022 | 07:04 PM
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Question Reading spark plugs:
Originally Posted by Fxdeez_
I have a 2000 FXD 88tc w/ mikuni 42 and thunder header it possibly has after market cams from the sound of it. I recently changed my plugs and after going on a 80 mile ride my plugs look black. Am I running rich ? What jets should I run ? Any suggestions or knowledge.
Go on YouTube. In the search box type in "read spark plugs like a pro". Kevin Baxter will break it down for you.

.
 
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Old Jul 24, 2022 | 07:10 PM
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Slightly rich. Why don't you just tighten the screw a bit and lean it up?
 
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Old Jul 24, 2022 | 07:46 PM
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Get rid of the shitty E-3 plugs and put regular Champions of NKG's in it.
 
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Old Jul 24, 2022 | 07:48 PM
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Originally Posted by chopper_man
Get rid of the shitty E-3 plugs and put regular Champions of NKG's in it.
 
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Old Jul 25, 2022 | 12:00 PM
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First thing is to get stock plugs in there.
 
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Old Jul 25, 2022 | 06:28 PM
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+1 with nevil, gap at 039-.040".
 
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Old Jul 25, 2022 | 07:57 PM
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Originally Posted by benscratchin
Go on YouTube. In the search box type in "read spark plugs like a pro". Kevin Baxter will break it down for you.

.
I will check that out thanks
 
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Old Jul 25, 2022 | 07:59 PM
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Originally Posted by Roadghost
Slightly rich. Why don't you just tighten the screw a bit and lean it up?
air fuel mixture screw?
 
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Old Jul 25, 2022 | 08:01 PM
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Originally Posted by chopper_man
Get rid of the shitty E-3 plugs and put regular Champions of NKG's in it.
I knew this was coming lol my local auto parts store was out and this is what they had .
 
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