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Old Sep 26, 2021 | 05:43 PM
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Default Hotter Plug?
Hey everyone. I have a 1997 Fatboy with Edelbrock heads, mikuni carbs and a bunch of other go fast stuff. It has a restrictive exhaust that I will be replacing in the spring but for now, its fouling the plugs (front one as normal is worst). It has Champion RN12YC plugs in it now, can anyone recommend a 1 step hotter plug that will work? I think its RN14YC but before I do anything I figured I'd get some input from folks that know what they are doing. Thanks in advance.
 
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Old Sep 26, 2021 | 07:48 PM
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How about leaning out the carb? In my experience, a hotter plug is a kludge to "get you home" until you can fix the problem.
 
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Old Sep 27, 2021 | 08:29 AM
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Post a picture of your plugs. There are different types of fouling, with each having a different cause.
 
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Old Sep 27, 2021 | 08:33 AM
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I agree with posts 2 and 3. With these high output ignitions, fouling a plug to the point of causing a misfire indicates something else wrong - like excessive oil use or carburetor issues.
 
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Old Sep 27, 2021 | 09:06 AM
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I'm sure its a carb issue. I need to get a less restrictive exhaust and set the carb correctly, which I plan on doing in the spring. I was trying to get a good temp solution for a few thousand miles until I do the real work.
 
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Old Sep 27, 2021 | 09:49 AM
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Originally Posted by evo4ever
I'm sure its a carb issue. I need to get a less restrictive exhaust and set the carb correctly, which I plan on doing in the spring. I was trying to get a good temp solution for a few thousand miles until I do the real work.

i think you are doing yourself and your engine a disservice following this approach

An hours time and minimal $`s could probably correct this problem

JMO
 
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Old Sep 27, 2021 | 10:33 AM
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I'm most concerned with my ability to mess a carb up - I'm a PRO at that :/ .
 
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Old Sep 27, 2021 | 11:04 AM
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Originally Posted by evo4ever
I'm most concerned with my ability to mess a carb up - I'm a PRO at that :/ .
If you never messed one up, then you never tried to fix one! That goes for anyone who ever turned a screw, self included.

Can't help you at all with a Mikuni, but there are many here who can....hang in there.
 
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Old Sep 27, 2021 | 12:06 PM
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HAHA! You guys might talk me into trying to adjust it. Carbs are not like regular wrenching for me because they aren't "binary" - they are sort of like art.
 
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Old Sep 27, 2021 | 12:17 PM
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What type carburetor?
 
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