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Thread: Fuel Geyser / Vent Line?

  1. #25
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    Re: Fuel Geyser / Vent Line?

    I had a tank vent problem on another bike I had and it would build pressure like that as well. There are three things you need to look for.

    1. Kinked hose/vent
    2. check valve installed backwards
    3. The emisions canister can become saturated with gasoline creating a "wet rag over an open drain" effect not allowing any gasses from escaping. I would remove the evap canister (if you have one) completely to eliminate this issue all together.
    -Travis-

  2. #26
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    Re: Fuel Geyser / Vent Line?

    Quote Originally Posted by spdu4ia View Post
    I had a tank vent problem on another bike I had and it would build pressure like that as well. There are three things you need to look for.

    1. Kinked hose/vent
    2. check valve installed backwards
    3. The emisions canister can become saturated with gasoline creating a "wet rag over an open drain" effect not allowing any gasses from escaping. I would remove the evap canister (if you have one) completely to eliminate this issue all together.
    Thanks man, I will look into those areas.

    I think only CA model CBRs have the charcoal canister, but if mine has one, it's coming off...
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  3. #27
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  4. #28
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    Re: Fuel Geyser / Vent Line?

    Quote Originally Posted by Ghost View Post
    I was just like "Hmm, tank hasn't blown, balls haven't roasted...yet...Hmm, tank hasn't blown, balls haven't roasted...yet...Hmm, tank hasn't blown, balls haven't roasted...yet..."
    Now thats funny.

    Its too bad you had solve your long term, intermittant drive-ability issue this way but so be it. Like I said got to be worth at least 10 more hp. LOL.

    Good to meet you. All in all had a good time today.
    Its not how fast you go, its how little you slow down.

  5. #29
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    Re: Fuel Geyser / Vent Line?

    Quote Originally Posted by Cornfed View Post
    Now thats funny.

    Its too bad you had solve your long term, intermittant drive-ability issue this way but so be it. Like I said got to be worth at least 10 more hp. LOL.

    Good to meet you. All in all had a good time today.
    Definitely man, good meeting and riding with you, such as it was. And I really appreciated your escort, at least I knew I'd have a witness if it turned to flaming carnage on the 470.

    Was a shit way to finally figure out my intermittent run issue, but IF that's it, and IF I get it fixed and IF we have better food service and NO lunchtime meth-head visitors or conga line traffic THEN we'd have a great ride...unless it's too boring/tame for you

    Personally, I could do without Speed 10: Motorcycle Time Bomb and just have a nice ride.
    Faster, faster, faster, until the thrill of speed overcomes the fear of death.
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  6. #30
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    Re: Fuel Geyser / Vent Line?

    Update--

    Stopped for gas during yesterday's ride and the fuel in the tank was under pressure when I opened the gas cap, and looking in both Brad and I saw that the fuel was fish-eye boiling with tiny wisps of vapor coming up.

    Checked the vent line, didn't appear kinked, pinched, or otherwise obstructed, and this issue only seems to occur when ambient air temp is 85+ and definitely at 90+ like yesterday.

    The run was to Deckers and back, so not even in high elevation like the last time when the tank decided to puke gas all over everyone within 5', but still it's a bit disconcerting to have fuel boiling in your tank...

    Any ideas?
    Faster, faster, faster, until the thrill of speed overcomes the fear of death.
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  7. #31
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    Re: Fuel Geyser / Vent Line?

    Again?

  8. #32
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    Re: Fuel Geyser / Vent Line?

    Quote Originally Posted by madvlad View Post
    Again?
    Yep. Not the full-on geyser, just a little wet fart when you open the tank, and then the lovely boiling gasoline...
    Faster, faster, faster, until the thrill of speed overcomes the fear of death.
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  9. #33
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    Re: Fuel Geyser / Vent Line?

    Ghost have you taken out your evap canister? It can cause this crap... If not remove it, hell I'll do it for you.

  10. #34
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    Re: Fuel Geyser / Vent Line?

    Quote Originally Posted by TransNone13 View Post
    Ghost have you taken out your evap canister? It can cause this crap... If not remove it, hell I'll do it for you.
    Bike's bone stock, so if it came with one then it's still on there. I thought only CA-model bikes had them, but maybe I need to actually go look at my bike later today and find out and see how it's connected and how to disconnect it.

    Thanks for the suggestion.
    Faster, faster, faster, until the thrill of speed overcomes the fear of death.
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  11. #35
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    Re: Fuel Geyser / Vent Line?

    Wow man, that's seriously crazy. Last year was nuts, definitely don't want to go through that again...

  12. #36
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    Re: Fuel Geyser / Vent Line?

    Quote Originally Posted by madvlad View Post
    Wow man, that's seriously crazy. Last year was nuts, definitely don't want to go through that again... maybe the venting design is not enough to keep the pressure and temps down.

    Yeah, I've not been up in the high country when the temps were over 85* yet this summer, but clearly it's possible with the weather now.

    I'm definitely not in the mood to go experiment and see if I can get it to blow 2 gallons of gas all over hell again...

    But, I do agree, there's some shitty design or manufacturing fault at work here as this is not "normal" by any means.

    I did a Google search and apparently some Gold Wings and even some Rincon and other Honda ATVs have similar problems...
    Faster, faster, faster, until the thrill of speed overcomes the fear of death.
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  13. #37
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    Re: Fuel Geyser / Vent Line?

    Most newer bikes are CA compliant. My CBR1000RR had it, my BMW G650, and my 1199S. Took it off of all of them. You have a 2008 right? I will send you a service manual.

    In the meantime, here's a microfiche of it:

    http://www.cheapcycleparts.com/model...semblies/19334

  14. #38
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    Re: Fuel Geyser / Vent Line?

    Quote Originally Posted by TransNone13 View Post
    Most newer bikes are CA compliant. My CBR1000RR had it, my BMW G650, and my 1199S. Took it off of all of them. You have a 2008 right? I will send you a service manual.

    In the meantime, here's a microfiche of it:

    http://www.cheapcycleparts.com/model...semblies/19334
    Gotcha, guess I'm out of the loop.

    Mine's a 2009, but I think it should be the same, or close enough.

    Thanks man.

    --when you removed yours, what did you do? Just splice in a hose where the tank was and run that out to the vent line under the fairing?
    Last edited by Ghost; Sun Jul 15th, 2012 at 01:15 PM.
    Faster, faster, faster, until the thrill of speed overcomes the fear of death.
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  15. #39
    Gold Member madvlad's Avatar
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    Re: Fuel Geyser / Vent Line?

    And what's crazy is that Honda is doing nothing to take care of this... you can't be the only one so I'm sure plenty of complaints there. This being a dangerous issue as well since that tank under pressure is a ticking time bomb

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    Re: Fuel Geyser / Vent Line?

    Quote Originally Posted by madvlad View Post
    And what's crazy is that Honda is doing nothing to take care of this... you can't be the only one so I'm sure plenty of complaints there. This being a dangerous issue as well since that tank under pressure is a ticking time bomb
    I spoke with Honda Customer Care and their Tech Line multiple times last year, I have notes from 5 different conversations, they sent a rep out to look at the bike when it was at the shop, and ultimately they've been acting like there's nothing wrong with the bike since it's an intermittent issue--and now that the bike's out of warranty they totally don't care.

    So...yeah...kinda underwhelmed with their support and their attitude towards this whole thing, especially since all of the issues began shortly after purchasing the bike, and in the beginning the shop was putting more miles on it than I was trying to diagnose the problem...
    Faster, faster, faster, until the thrill of speed overcomes the fear of death.
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  17. #41
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    Re: Fuel Geyser / Vent Line?

    Never had this issue on my '08. Posting link to manual...

  18. #42
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    Re: Fuel Geyser / Vent Line?


  19. #43
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    Re: Fuel Geyser / Vent Line?

    Quote Originally Posted by TransNone13 View Post
    Never had this issue on my '08. Posting link to manual...
    I used to know what the differences were between the two, and I know some of them dealt with emissions, but dunno if that's related or not.

    Quote Originally Posted by TransNone13 View Post
    Awesome, thanks again!
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  20. #44
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    Re: Fuel Geyser / Vent Line?

    You just need to bypass the canister. So really all you need is some PVC NPT Y or T line and remove the canister. You could remove it all and cap off all the hose points. But you still need that overpressure/overfill drain line.

  21. #45
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    Re: Fuel Geyser / Vent Line?

    Looks like it's on the backside of the delta frame. Looking like 2 inlets and 1 drain. Patch the 2 through to the drain and viola! You also have a solenoid. That could be bad but not the cause... You could remove that and plug it and see if your bikes throws a service light. Or simply plug the evap canister end.
    Last edited by TransNone13; Sun Jul 15th, 2012 at 02:22 PM.

  22. #46
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    Re: Fuel Geyser / Vent Line?

    Quote Originally Posted by TransNone13 View Post
    You just need to bypass the canister. So really all you need is some PVC NPT Y or T line and remove the canister. You could remove it all and cap off all the hose points. But you still need that overpressure/overfill drain line.
    Quote Originally Posted by TransNone13 View Post
    Looks like it's on the backside of the delta frame. Looking like 2 inlets and 1 drain. Patch the 2 through to the drain and viola! You also have a solenoid. That could be bad but not the cause... You could remove that and plug it and see if your bikes throws a service light. Or simply plug the evap canister end.
    Awesome, looks like I have a new summer project. I think I'll try to bypass/remove the canister and simplify the whole thing. My F4 simply vented to atmosphere and in its 10yrs with me it never leaked as much gas as the RR did when it blew 2+ gallons all over Mt. Evans, so as long it doesn't set a light I think simplest is best and the more I can remove the better--plus, less weight!

    Thanks for all the help, I appreciate it.
    Faster, faster, faster, until the thrill of speed overcomes the fear of death.
    ~Hunter S. Thompson



  23. #47
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    Re: Fuel Geyser / Vent Line?

    Quote Originally Posted by Ghost View Post
    Awesome, looks like I have a new summer project. I think I'll try to bypass/remove the canister and simplify the whole thing. My F4 simply vented to atmosphere and in its 10yrs with me it never leaked as much gas as the RR did when it blew 2+ gallons all over Mt. Evans, so as long it doesn't set a light I think simplest is best and the more I can remove the better--plus, less weight!

    Thanks for all the help, I appreciate it.
    Yeah, you can probably do this in an hour. If you're in the Springs some time, I will do it for you, in maybe 30 minutes .

  24. #48
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    Re: Fuel Geyser / Vent Line?

    Quote Originally Posted by TransNone13 View Post
    Yeah, you can probably do this in an hour. If you're in the Springs some time, I will do it for you, in maybe 30 minutes .
    If you say 1 then it'll probably take me 2 as I'm slow.

    I'm not usually in the Springs, but maybe this is worth a trip down. I'll try to look at it myself this week and see if I can swing it or not, if not I'll shoot you a PM or something if that's cool.
    Faster, faster, faster, until the thrill of speed overcomes the fear of death.
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