does your gsx-r gas cap howl? - Sportbike Forum: Sportbike Motorcycle Forums
 
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post #1 of 6 (permalink) Old 01-16-2006, 09:46 AM Thread Starter
 
Join Date: Oct 2005
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Question does your gsx-r gas cap howl?

my gas cap whistles, any ideas what causes that?
cichlid is offline  
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post #2 of 6 (permalink) Old 01-16-2006, 12:15 PM
 
Join Date: May 2005
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What I think your hearing is common across most sport bikes (all brands) it's the tank venting. Usually with large temperature changes and the steadily burning gas the tank needs to vent... most do so thru the cap. It can sound like a high pitch whining, or a hissing sound like a pin hole in your tire. Some bikes do it worse than others.... my old 9's were quite loud.

No worries.
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post #3 of 6 (permalink) Old 01-16-2006, 01:12 PM
 
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Hi cichild-

Does the sound occur at all times, or just after fueling? What about different temperatures and humidity levels? This isn't something I've ever noticed on my Honda CBR 600F2 in the past. It doesn't make a sound while riding or when the engine is running.

About the only thing I may have ever heard is a barely-audible gasp when I open the tank to top-it-off on really hot days. Even then it is very infrequent and not something I could say happen with any regularity.

~ Blue Jays ~
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post #4 of 6 (permalink) Old 01-16-2006, 01:51 PM
 
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Mine usually does that when i'm running low on fuel.

-=bmacd=-
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post #5 of 6 (permalink) Old 01-16-2006, 06:20 PM
 
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My FJ1200 does it. Freaked me out at first. Now I'm used to it.
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post #6 of 6 (permalink) Old 01-17-2006, 06:41 PM
 
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Mine does it only when I open the cap to put gas in.
ESanders2 is offline  
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