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xs650 > > Motorcycle Systems > > Fuel > > pressure in tank |
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Judotrip Full Member
Joined: May 31, 2007 Posts: 34 Location: Seattle
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Posted: August 3, 2007, 5:31 pm Post subject: pressure in tank |
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riding up a steep incline i noticed a pressure sound comming from the tank..Is this common, or should there be a vent or something?
thanks,
Judo
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xsjohn Full Member
Joined: Jul 30, 2006 Posts: 5857 Location: North Carolina USSA
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Posted: August 3, 2007, 5:53 pm Post subject: Re: pressure in tank |
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It's the spirits expelling themselves from the tank...Sorry I'm watching a horor movie...The vent is in the lid but I can't imagine how you could hear it when it is running.....Unless it truly is spirits.......Hot weather makes them excited........It is hotter than hell outside.......
John
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xs1961 650Rider Supporter
Joined: Apr 23, 2007 Posts: 1808 Location: uk
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Posted: August 3, 2007, 6:54 pm Post subject: Re: pressure in tank |
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jeez...mine hisses at standstill...htf can you hear it running uphill? ...lol
Seriously though...if you CANT hear it hiss - then be worried..petrol(gas) expands/froths (whatever) with heat or shaking just like a fizzy(pop) drink
The cap has a breather hole,without it youd create a vacumn as the juice was sucked out!
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Xumi Full Member
Joined: May 18, 2007 Posts: 395 Location: San Marcos, CA
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Posted: August 5, 2007, 12:30 am Post subject: Re: pressure in tank |
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xs1961 got it right... that's why on a lot of newer bikes (that have not been DE-EPA'd) will run dry after being over filled. The vent typically runs into a charcoal filter canaster.. and if you overfill the tank, it fills the canister, so it can't vent properly.. which creates vacuum.. which runs the carbs dry.
Now aren't you glad we have simple bikes?
_________________ Xumi
San Marcos, CA
'79 XS6502F
'95 VN1500A |
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Judotrip Full Member
Joined: May 31, 2007 Posts: 34 Location: Seattle
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Posted: August 5, 2007, 1:10 pm Post subject: Re: pressure in tank |
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it was a pretty strange sound, and I am trying to be aware of all sounds and strange virbrations...I guess I need to treat it like my diesel and treat all wierd noises as good and silence as bad...
Did I mention I am bionic man....
Judo
Thanks for the info,
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