Am I missing a hose?? Carbon canister hose MIA? Pic attached, please help ASAP

Discussion in 'Mechanics Garage' started by ubermaxii, Nov 5, 2010.

  1. ubermaxii

    ubermaxii New Member

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    Hey guys. So i am changing my oil and looking at complicated Japanese stuff while its draining and notice the little carbon canister (i assume that's what it is) on front lower of bike. On the left side there is a hose that appears to run to the hose "drip" section (3 pr 4 that hang towards the ground in a clamp). On the same side of the canister, there is a hose "bung" with NOTHING attached. That seems odd and wrong. There were no hoses hanging anywhere that could have come loose. Is there supposed to be a plug?

    Thanks in advance guys!
     

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  2. 02 VFR Rider

    02 VFR Rider New Member

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    yes you are.
    I will look at my bike tomorrow and follow it and let you know where it goes.
    better yet just remove the whole set up.
     
  3. ubermaxii

    ubermaxii New Member

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    That seems to be the way to go (removal). Do you know if I will hurt anything by continuing to ride as is? Should I plug it temporarily?
     
  4. 02 VFR Rider

    02 VFR Rider New Member

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    I have had mine off for a year along w/ pair removed with no problems.
    If you are going to keep it on , dont plug it.
    I will post tomorrow where the line goes.
    is won't hurt anything to leave it open for now.
     
  5. ubermaxii

    ubermaxii New Member

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    How difficult is removal? Is it a pull and plug operation or is it a "order this expensive kit" kind of thing? I'm going to look up removal posts and see if I can find a write up, too. Thanks!
     
  6. 02 VFR Rider

    02 VFR Rider New Member

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    just remove it, best to remove the fairings, I believe there is one line that is a vacum line you have to plug.
    no kit needed other then a few rubber plugs.
    I'm not sure of a thread on how to remove it but I have mine in a box that I can do a short write up on it and send you.
     
  7. brock915

    brock915 New Member

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    I noticed mine was missing to after I purchased my 2003 last year. Doesn't seem to cause any issues.
     
  8. ubermaxii

    ubermaxii New Member

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    lol. I hate stuff like this. If it doesn't do anything fine, but why won't they stick a plug on it??? I wish i had a diagram of the system so I could figure out how to bypass easily.
     
  9. Comicus

    Comicus New Member

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    I'm not 100% sure I'm going from memory (and I had a high level of pot intake during high school and college so take It for what it's worth) but I don't believe a hose attaches there. Its an evap canister and needs an opening so the evaporation process can take place. An exhaust port if you will. I do remember when I removed mine on my 04 nothing was attached there.
     
  10. ubermaxii

    ubermaxii New Member

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    I considered that too, but if you follow the hose attached right next to that, it is one of the vent lines hanging below the bike. I guess I'll leave it be until 02 gets back to me! Thanks
     
  11. Comicus

    Comicus New Member

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    I'm pretty sure there is a download on vfrworld for the mx manual. I'd just look at the diagram and see if there is a hose that attaches there.
     
  12. ubermaxii

    ubermaxii New Member

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    Probably a dumb question, but where abouts would I find the download section? Or is it a link somewhere? Thanks!
     
  13. donald branscom

    donald branscom New Member

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    A lot of misinformation here. You cannot just yank the charcoal canister off. It has vacuum lines connected to it and each vacuum line does have a function. The workshop manual for each motorcycle shows the vacuum line diagram and many motorcycles have a vacuum hose routing diagram under the seat or some place on the motorcycle. The charcoal canister has vacuum hoses going to it that have fuel vapors going through them. If you park your motorcycle in your garage and too many fumes are going through it or one of the floats stick the fuel could come out onto the garage floor and the hot water heater or any open flame could ignite the fuel. Some garages have electric hot water heaters. 1. One of the vacuum lines from the fuel tank has fuel vapors and that goes to the charcoal filter. 2. One of the vacuum lines (second one) has fuel that tries to over flow the gas cap ( over filling of gas. or sloshing) and that goes to a fuel/air separator and then to the charcoal canister. 3. When you start your engine there is a PURGE hose from the charcoal canister that takes all of the unburnt fumes that accumulate in the filter and sends them back through the engine to be reburnt. 4. One opening on the charcoal canister DOES go to atmosphere. There are variations . 5. One of the vacuum lines going to the filter comes from the float bowls on carbed bikes. That is a very important system. If that hose has vacuum then you cannot just pull it off because you would have a vacuum leak. A serious vacuum leak and you cannot just plug it or the float bowls would not get any gas. That is why it is hooked to a vacuum switching valve that closes on start up. Some 49 state bikes have the float bowl vent go back into the intake and has a flap over it to keep intake from sucking all the gas out of the float bowls on acceleration. The charcoal canister weighs almost nothing. It robs NO power from your bike. It is usually hidden. IT helps the environment ,and prevents fumes from building up in your garage. It is not a problem.

    You could remove the charcoal filter and fuel/air separator and an vacuum switching valves and figure out how to vent the float bowls without losing vacuum. but you will have gained nothing. You motorcycle would just be like any other 1950 year motorcycle . Vents lead to atmosphere and DO NOT GO THROUGH A CHARCOAL FILTER.

    A lot of work just to get to smell more gas fumes wouldn't you say?
     
  14. Comicus

    Comicus New Member

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    I'm not sure if you found the answer or not but I did finally look up the vacuum hose routing diagram and there is no hose that attaches to that part of the Evap canister. According to the service manual it should be open to air. page 1-43 of the honda service manual. I removed mine when I did the pair valve mod...It's now a lot easier to get to the oil filter when I change the oil.:cheersaf:
     
  15. 02 VFR Rider

    02 VFR Rider New Member

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    I came up w/ the same. ^^^^^^^^^^^^^^^
     
  16. donald branscom

    donald branscom New Member

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    Just like i said. ( point #4 on post #13.)

    One port vents to atmosphere. It is just that the open port they used has that ridge on it that makes it look as if though a hose should go on it.

    When you buy a motorcycle or car you HAVE to buy a shop manual, or you will be lost.
     
  17. ubermaxii

    ubermaxii New Member

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    I downloaded it after this issue came up. Thanks for the info everyone. Also, as far as removing the canister goes - I agree. There is no point. It's a simple system that just helps keep the world a little nicer! Any mods I do would have to either

    1. give me REAL power gains in USABLE bands
    2. improve my riding comfort :)

    Based on what I have gathered, number 1 doesn't ever happen. My money is going towards the latter....

    COMPLETELY off topic, but since I've got the attention of so many bright folks. WHY does this bike have such lousy off-idle characteristics? I mean its fuel injected, with a healthy array of sensors... why can I not hold an RPM with my hand below around 4k? Ever since she was brand new, she sputters, hesitates, and floats (rpm) at low throttle - even on a stand in neutral. WHAT GIVES? It makes me feel like something is wrong, but I don't THINK anything is. Any suggestions, input, or explanations?

    Thanks again, guys!
     
  18. donald branscom

    donald branscom New Member

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    Something not right because it should idle at around 15oo rpm and be steady.
    Check with dealer on known issues. First.

    The hardest thing for an engine to do is to idle.
    Valves must be adjusted or known to be in adjustment.
    A tight valve will cause it to idle poorly.

    It is not right thats for sure. You are right. You are not crazy.

    Try opening the gas cap while idleing and see if that makes any difference.
     
  19. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    should prrr like a sewing machine. vacuum leak, imbalanced butterfly valves, partially clogged injectors, bad 02 sensors, tight valve........
     
  20. donald branscom

    donald branscom New Member

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    I agree. I would start with a complete work up.
    Compression check, Vacuum check, valve clearences ...all the usual suspects.
    And of coarse a GOOD visual inspection of all hoses ,and wiring etc.,.
     
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