DIY: Charcoal Canister Removal on F800GS (with pictures!!)

Discussion in 'Parallel Universe' started by Y E T I, Aug 28, 2009.

  1. jscottyk

    jscottyk Been here awhile

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    Hey all you CC Removers!
    Just following up on this thread, and what was learned in the 800GS Charcoal Canister thread, is anybody foregoing the Uni filter on the line from the fuel tank vent and just extending to run to bottom of the bike as described in the f800riders.org procedure description?

    The Uni filter seem unnecessary considering the one way flow of this line.
  2. ebrabaek

    ebrabaek Long timer

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    How do you recon that..... The arrow should point inward towards the tank, the line thus venting towards the tank, as fuel is burned. Mind you the CC served as a filter when it was installed. That said many mx bikes run without any filter.:D:D
  3. JRWooden

    JRWooden Long timer

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    I think the valve is a 2-way valve with different settings for vacuum and pressure relief ... so air is drawn back into the tank from this line
    (If I'm thinking about the right line....)

    On the other hand, on the Eurozone bikes that do not have a CC, I do not believe that there is a filter installed from the factory......
  4. jscottyk

    jscottyk Been here awhile

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    I was under the impression from reading the reference threads that the flow was from the tank towards the charcoal canister and that air coming into the tank came from a valve that was part of the Fuel Pump Assembly.

    All that said, there is a lot of noise among all the signal in these threads and I might have misunderstood.


    I think I missed that. Still, as you mention the Euro bikes just vent to the ground and nobody seems concerned about sucking dust into their fuel tanks.
  5. wizze

    wizze Wizze = Wise

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    I replaced my vent line running straight to the ground with a Uni filter. I can confirm that my Uni is wet with fuel. Not dripping wet but damp. I thought I smelled some today in 90+ degree heat.
  6. ebrabaek

    ebrabaek Long timer

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    When I took mine off I did a little testing with the "one way valve" I found that it would relieve freely towards the tank ( with the arrow) as it should, as fuel is burned. But the other way required about 5 psi to open, unless you applied a slight vacuum against the arrow ( think purge valve opening, and intake vacuum is applied to the CC to combust fumes) then it opened effortless as well. Scratched my head, and just removed the valve. I see no need to resist/restrict air going either way. I thought about the filter because of the fact that I am in the desert southwest, and dust gets in everywhere, but is perhaps overkill. Specially since my 55 hp thumper next to it, has nothing......:D:D
    I recall Joel mentioning that it is a little porous ball inside the little canister...I am sure you will be fine either way. I do have slight saturation ( oil+dust) around the filter after a couple of years riding it, and just figured that, I'd protect the fuel pump, andinjectors as best as I can..... They don't need any help in failing. They do that fine by them self.....:D:lol3:lol3
  7. jscottyk

    jscottyk Been here awhile

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    All sounds like a reasonable approach. Do you have it tucked under the seat near the rear light?
  8. Y E T I

    Y E T I No Talent Ass Clown

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    Wow, this thread is still going strong.

    I put the Uni on because I'm in the desert southwest with a lot of dirt. (Same reason I have the 7602 carb filters on my dirtbikes.). I also wonder if enough dust/dirt could accumulate in the hose to plug it? :dunno
  9. ebrabaek

    ebrabaek Long timer

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    Correct......:thumb:thumb
    [​IMG]
  10. JREDDING

    JREDDING Adventurer

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    Does anyone have concern about the fuel tank venting under the seat (as shown in prev post) where fuel vapors could accumulate? Or am i missing something?<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:eek:ffice:eek:ffice" /><o:p></o:p>
  11. ebrabaek

    ebrabaek Long timer

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    IMHO... there is plenty of fresh air venting under the seat to migrate the vapors away. That said, just put the filter, where you feel comfortable. It can go anywhere you feel. I put it under the seat, as the hose was already there, and the dirt impact into the tank is minimal.
  12. JREDDING

    JREDDING Adventurer

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    I noticed your post about the angle of the valve? DId you move it and have to worry about the angle? I am not 100% understanding the "angle" bit.

    I want to remove the long hose that connects to the valve and ran to the CC, install a shorter piece to run to the location shown in your photo, and then install a filter...or do i need to do something else?
  13. ebrabaek

    ebrabaek Long timer

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    I am not sure about your question regarding the angle. Please refresh my memory...??? I put another hose....might even have used the hose from the valve ( check valve under the colored plastic 12 inches from the tank) to the CC, and just ran it from the tank....all the way to the filter location. The angle on the filter was set with the zip tie to facilitate proper drainage, in case I bounce around with a full tank, and slush some fuel into the filter. It has happened on steep techno climbs, but then fuel just trickled a few inches underneath.
  14. HighTechCoonass

    HighTechCoonass Living the Dream....

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    I used one of these .. I could not find the filter...[​IMG]
  15. Swashbuckler

    Swashbuckler Been here awhile

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    I replicated this 2 weeks ago. No fueling issues since. The only issue I had was thinking that the CC was some small canister hidden someplace. It took me a few minutes to realize it was the huge 20oz soda bottle sized black canister in plain freaking view. :lol3
  16. ebrabaek

    ebrabaek Long timer

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    LOL.... Awesome.:clap
  17. Gangplank

    Gangplank Advenchaintourer

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    I'm doing the cannisterectomy on my F650GS'YZ'Dakar project bike and came accross this thread.

    Not sure I see the point in the putting the little mini air filter on it.

    Looking at the parts diagrams

    16_0692 - FUEL TANK.... and
    [​IMG]

    If you follow the hoses the go:

    From tank Safety Valve (rollover valve) item#3 (part No. 16117691397)
    to a hose #14 part 11747797115 "HOSE RUNNING METER - 4,5X9MM (meter)"
    to #15 part no. 61661382908 "CONNECTION PIECE"
    to a hose...
    to #17 part no. 16117721943 "VENTILATION VALVE"

    Then if you look at diagram 16_0696 - ACTIVATED CHARCOAL
    [​IMG]

    Item#08 is that same part no. 16117721943 "VENTILATION VALVE" and it connects to the same "Running Hose" #9 (part no. 11747797115)

    = Exact same ventilation valve and hose as above.

    Then it goes via #7 hose to the charcoal can.


    So all you really need to do to remove the can is to connect the Ventilation Valve" item#8 in this drawing to #14 hose and leave the Y in place. Tank will vent itself as normal and no water gets in.

    Then just remove both hoses from #4 Fuel Tank Breather Valve (part no. 13901465030) and leave it plugged in place so it can cycle but doesn't throw a code.

    Finally plug the hose coming off #4 to the right which connects to the throttle bodies.

    They way it is in the drawing above you are plugging before the electric breather valve but I can't tell why you would want to do that.

    The filter won't do much really other than catch gas but if you connect on the other side of #08 VENTILATION VALVE then that valve probably blocks the gas and lets the air out as needed.
  18. tempeturtle

    tempeturtle Adventurer

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    Part 8, the valve seems to get gummed up (small pouris ball) and if that happens pressure builds up in the tank and some have cracked. I removed part 8 when I removed the canister and terminated it into a filter. Is it needed? Probably not but I felt better after words.. haha. Anyways I would most defiantly remove that part 8 valve.
  19. Gangplank

    Gangplank Advenchaintourer

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    Two more thoughts...

    1) seems to me an inline filter would work as good as the red filter on the end. Maybe an inline fuel filter?

    2) If the EU bikes don't have the charcoal canister AND ALSO don't have the fuel tank breather valve (part. no 13901465030) why is it there and what does it do?

    I'm thinking about just unhooking the hoses from both ends of that valve and leaving it in place to cycle air. Then I'll cap the hose going back to the throttle body so it will be more like the EU bikes.
  20. Gangplank

    Gangplank Advenchaintourer

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    So I tested the charcoal canister on my F650GS that I have just removed by blowing into it. The CC flows air pretty well.

    So I am wondering if plugging the Breather Valve has any ill effects? What would happen if I just left a hose connected to the breather valve and let it breathe to the atmosphere? Or connected it via a T back to the tank and atmosphere.

    Seems to me if that valve is sucking air but is plugged then the fueling at certain throttle tip parameters might be off a it. :?