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Spark plug interchange

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Old Oct 27, 2025 | 07:16 PM
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Default Spark plug interchange

Just wanted to confirm but will a RN12YC interchange with a 5R6A? I have a 1996 ultra classic.
thanks!
 
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Old Oct 27, 2025 | 08:09 PM
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Originally Posted by AndyinCT
Just wanted to confirm but will a RN12YC interchange with a 5R6A? I have a 1996 ultra classic.
thanks!
Try this Spark plug cross reference
 
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Old Oct 27, 2025 | 08:10 PM
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RN12YC = NGK ZGR5A
 
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Old Oct 27, 2025 | 08:13 PM
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RN12YC will interchange with HD 5R6A.
 
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Old Oct 27, 2025 | 10:04 PM
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Nice when you can get an answer in only 5 posts
 
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