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Author Topic: Is this the knock sensor?  (Read 1518 times)

Offline Weggy13

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Is this the knock sensor?
« 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.


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Online Brock

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Re: Is this the knock sensor?
« Reply #1 on: March 13, 2021, 02:45:28 PM »
Probably is, connect it and see what happens.
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Online ruSTynutz

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Re: Is this the knock sensor?
« Reply #2 on: March 13, 2021, 03:08:52 PM »
Quote from: Weggy13 on March 13, 2021, 02:43:01 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
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Offline cravenhaven

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Re: Is this the knock sensor?
« Reply #3 on: March 14, 2021, 08:57:42 AM »
Yep, definitely is. There's also one on the other side of the engine.
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Offline Biggles

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Re: Is this the knock sensor?
« Reply #4 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.
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Offline Weggy13

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Re: Is this the knock sensor?
« Reply #5 on: March 14, 2021, 12:32:59 PM »
Quote from: 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.
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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