[2008+] Beep noices while riding - Kawasaki Ninja 250R Forum
 
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post #1 of 3 (permalink) Old 09-07-2011, 01:27 PM Thread Starter
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Beep noices while riding

Sometimes when i am riding my ninja 250r 2008 i hear this beeping noise and sometimes its not there but a lot of the times it is, should i be worried about this or is it nothing to worry about.

Thanks in advance

Jack
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post #2 of 3 (permalink) Old 01-22-2012, 02:03 PM
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i've got the same problem with my bike. at first i thought it was that i left the turn signal on or something, but that wasnt it.
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post #3 of 3 (permalink) Old 01-22-2012, 03:49 PM
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The noise you hear is more than likely coming from the gas cap. The gasoline vapors in the gas tank expand inside the tank, especially in the heat. Sun on the tank and heat from the engine makes it worse. The gas cap has a small vent controlled by a diaphragm which allows excess pressure to escape, thus the whine/ whistle/ whimper/fart / beep whatever you want to call it.

You can hear the tank whistle at the end of the video.
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