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General Discussion / Re: My new v9
« Last post by Kev m on Today at 05:34:16 PM »From what I can find,Guzzis didn’t have knock sensors before 2024.My Stelvio experience using regular tells me that the motors were built to take regular or anything else .So I will be trying my seat of the pants knock sensor to see if the v9 likes regular.Apparently knock sensors can fail,maybe causing more hassle than they avert because they change the combustion mixture automatically so you wouldn’t know if your octane is too low.
Knock sensor input primarily causes the ECU to retard ignition timing.
I don't believe it usually has an effect on the air/fuel ratio which is primarily based on mass air sensor (don't know any motorcycles that use this) or MAP sensor (speed-density) along with inputs from the temp sensors, TPS, and CPS with modification in closed loop from O2 sensors.
But things are always evolving.




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