Chirp sound
#1
#2
#6
Try slowly moving your idle up an down to see if you can re-create the sound. My 03 KFX does the same (not sure if it is what you are describing) if the idle is at exactly the right place (kind of low in the RPM's). It hits a resonate frequency that causes something to vibrate from underneath the seat.
#7
Try slowly moving your idle up an down to see if you can re-create the sound. My 03 KFX does the same (not sure if it is what you are describing) if the idle is at exactly the right place (kind of low in the RPM's). It hits a resonate frequency that causes something to vibrate from underneath the seat.
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#10
Join Date: Dec 2008
Location: Tracy, California, USA
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I listened to both videos, and I think the chirp sounds more like a "ding". It reminds me of those little bells on the counter of cheap motels that you "ding" to bring out the desk clerk who's asleep in the back.
Am I right, or is something lost in the video/audio?
A long bell like "ding" that fades over a long period of time after the engine stops (compared to a millisecond anyway) indicates to me that there is a mechanical resonance involved, and that very little energy is being dissipated during the ring down. If you grab ahold of a ringing bell, the sound stops abruptly because your fingers absorb all the energy in the "ring".
A bad bearing can make noise with motion, but when the motion stops so does the noise (almost instantly), for the same reason as grabbing ahold of a ringing bell stops the noise. Any vibrations making noise will be squelched by friction when the energy source (i.e. the rotating engine) stops.
Thus I think that if the ding sound continues for some time after the engine stops, it must not be bad because if it was doing something bad that would take energy, and the energy consumed would squelch the ding instantly.
So is it a ding sound? Or am I completely off track?
Am I right, or is something lost in the video/audio?
A long bell like "ding" that fades over a long period of time after the engine stops (compared to a millisecond anyway) indicates to me that there is a mechanical resonance involved, and that very little energy is being dissipated during the ring down. If you grab ahold of a ringing bell, the sound stops abruptly because your fingers absorb all the energy in the "ring".
A bad bearing can make noise with motion, but when the motion stops so does the noise (almost instantly), for the same reason as grabbing ahold of a ringing bell stops the noise. Any vibrations making noise will be squelched by friction when the energy source (i.e. the rotating engine) stops.
Thus I think that if the ding sound continues for some time after the engine stops, it must not be bad because if it was doing something bad that would take energy, and the energy consumed would squelch the ding instantly.
So is it a ding sound? Or am I completely off track?