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Old Feb 20, 2025 | 07:35 AM
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From: flagstaff az
Default O2 sensor

OK, this might be a strange question but I bought an oh8 road king and I just noticed that it’s got the 18 mm O2 sensor which my understanding is the wide band I thought that they all came with the 12 mm narrow band sensors. The ECM looks to be a stock ECM. The only thing that I know was done to the bike is it was put to a 103 stage two at a Harley dealership it has the sticker on the neck of the bike saying that he’s a stage two. Is there a chance that it’s been upgraded to a wide band ECM it’s not a thunder max. It looks like a stock ecm

thanks in advance for any help
 
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Old Feb 20, 2025 | 09:03 AM
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I believe they went to 12mm narrow band sensors in 2012. before that 18mm narrow band sensors.
 
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Old Feb 20, 2025 | 09:16 AM
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Old unheated sensors had two wires and were 18mm. How many pins are in the plugs?
 
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Old Feb 20, 2025 | 02:20 PM
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Default O2 sensor

That’s why my 13 ultra has the smaller 12 mm ones thanks again
 
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