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Thread: Charcoal Fuel Canister

  1. #1
    Registered User crucian's Avatar
    Join Date
    Jun 2017
    St. Croix, Virgin Islands

    Charcoal Fuel Canister

    I ran into a discussion relative to removing the fuel charcoal canister on US bikes due to charcoal fouling the fuel filter and causing performance problems. The only thing I had seen about these systems is advice not to overfill at the pump because the excess just goes to the canister and evaporates.

    Anyone experience performance issues, clogged fuel systems?

    I would lean toward following fuel filter replacement on the recommended cycle and more often if you are fueling in dodgy locations.

  2. #2
    not so retired henzilla's Avatar
    Join Date
    Sep 2006
    If your bike has had a prolonged nap on its side, a concern. With normal upright riding, no big concern.

    The older tomato can systems on R11XX models that did get gas fouled caused more issues

    And other than the pickup sock screen on fuel pump, no fuel filter to service.
    Steve Henson-Mod Team and SABMWRA Prez

    Be decisive, right or wrong.The road of life is paved with
    flat squirrels who couldn't make a decision~unknown

  3. #3
    Fortis Fortuna Adiuvat Omega Man's Avatar
    Join Date
    Jan 2010
    Id try to not overfill too often. Should be no worries.
    "You can do good or you can do well. Sooner or later they make you choose." MI5
    Mod Squad
    2009 F800GS 1994 TW200

  4. #4
    MOA #24991 Pauls1150's Avatar
    Join Date
    Apr 2008
    south of Los Angeles
    Can't speak for the wet-, cam-, or hex-heads, but with the oilheads, that charcoal could get sucked into the injectors via the vacuum line. Truly bad boogie: if it didn't outright clog the line or the injector, it would stick on the intake valve's seat or partially burn in the combustion chamber.

  5. #5
    Registered User ExGMan's Avatar
    Join Date
    Sep 2009
    Chestnut Hill, MA
    I had a 2008 RT (Hex-head), and had many occasions where the engine would run rough. I did the canisterectomy and following that, all was well. I think you could read about others' experiences as there were Forum threads in the past about this issue and resolution.
    John Gamel - BMW MOA Consumer Liaison
    2015 Ebony Metallic R1200RT
    Watching the sunrise outdoors statistically increases your odds of having a good day. And needing a nap after lunch.

  6. #6
    Dee G flymymbz's Avatar
    Join Date
    Nov 2006
    Central WA
    Removed the canister from my 98 R850R (with about 13,000 miles on it). It had a bunch of fuel in it. I don't overfill, maybe the previous owner did???
    Too damn many bikes to list

  7. #7
    Registered User easy's Avatar
    Join Date
    Feb 2005
    Texas Hill Country
    I had a '96 R1100R for 10 years and the canister never gave me a single problem, but then I don't overfill.

    Also, taking the canister off means you will not be getting that Happy Birthday card from the EPA.

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