CBR 929RR 2000 - 2001 CBR 929RR Forum

Random clunk/ knock noise at idle

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Old Mar 26, 2021 | 08:15 AM
  #1  
Daz Tank's Avatar
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Default Random clunk/ knock noise at idle

When the bike is at idle, this strange knock noise occurs at random. Sometimes ten second intervals sometimes twenty, random. Not sure what it could be. The motor kind of stops for that micro split second and then kicks back in. Plz plz plz someone help 🙏
 
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Old Mar 26, 2021 | 10:31 AM
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Audio or video would certainly help people understand what you're describing.
 
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Old May 9, 2025 | 03:04 PM
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Did you ever figure it out? Mine is doing it now
 
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Old May 13, 2025 | 11:57 PM
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I would check your spark plugs, coils and wire connections. Seems like every time I mess around in that area it will idle smoother and the noise will go away at least mostly. I think I might have a short on a coil wire or something. I have a replacement wire harness and some coils coming on Saturday. I think what might be happening is at idle it will stumble just enough for the clutch plates to stop moving in sync and then they clunk together when the engine recovers.
 
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