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Honda ST1300 Section => Honda ST1300 General Questions => Topic started by: Weggy13 on March 13, 2021, 02:43:01 PM

Title: Is this the knock sensor?
Post by: Weggy13 on March 13, 2021, 02:43:01 PM
Hi all,
I’ve been having problems with rough running, bad fuel economy, overfuelling, fouled spark plugs primarily on clutch side, f1 code 25, to the point of feeling like stalling at highway speeds when the bike is warm, have done an ecu reset and seemed to help for a little bit but then same problems.  I’ve just taken the plastics off and looking at clutch side, is this the knock sensor connector? It wasn’t connected, plug just hanging. (https://uploads.tapatalk-cdn.com/20210313/7743e58b96ac5d8883b267df494fb6ae.jpg)


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Title: Re: Is this the knock sensor?
Post by: Brock on March 13, 2021, 02:45:28 PM
Probably is, connect it and see what happens.
Title: Re: Is this the knock sensor?
Post by: ruSTynutz on March 13, 2021, 03:08:52 PM
I’ve just taken the plastics off and looking at clutch side, is this the knock sensor connector? It wasn’t connected, plug just hanging.

Looking at this diagram: https://tinyurl.com/y3jp98by it definitely looks like a knock sensor...  :thumbs
Title: Re: Is this the knock sensor?
Post by: cravenhaven on March 14, 2021, 08:57:42 AM
Yep, definitely is. There's also one on the other side of the engine.
Title: Re: Is this the knock sensor?
Post by: Biggles on March 14, 2021, 12:29:57 PM
Good to know those symptoms, but I'm wondering how a plug like that just fell off.  Most plugs on the STs are hard to get of at the best of times.
Title: Re: Is this the knock sensor?
Post by: Weggy13 on March 14, 2021, 12:32:59 PM
Good to know those symptoms, but I'm wondering how a plug like that just fell off.  Most plugs on the STs are hard to get of at the best of times.
Yeah not sure myself, once reconnected it was quite difficult to remove again. My suspicion is the guy I bought it off got the dreaded error 25 and disconnected it. Reconnection didn’t help the symptoms after a test ride yesterday afternoon unfortunately. Might be time for a visit to the shop...


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