What does this hose do?

Discussion in 'Parallel Universe' started by sarathmenon, Jun 28, 2012.

  1. sarathmenon

    sarathmenon Armchair Adventurer

    Joined:
    Mar 29, 2012
    Oddometer:
    1,538
    Location:
    SFO Bay Area
    So, I was looking at the underside of my F800GS during my first oil change and happened to see this hose sticking out, somewhere between the cat and around the place where the center stand attaches. I am usually wary of objects pointing out, but the end looks cut sharp and shouldn't be something that snapped. I am assuming it has been always that way and that this is some sort of a breather pipe. I don't see any flashing light on the dash, and no cause of alarm generally on the bike. But still, is this normal; do you folks have it on your bikes as well?



    [​IMG]
    #1
  2. EggChaser

    EggChaser Been here awhile

    Joined:
    Aug 31, 2008
    Oddometer:
    536
    Location:
    Hamsphire/Surrey Borders
    It's probably the breather/overflow from the fuel filler area. R1200GS had at least one of those so assume the other models have them as well.
    #2
  3. tofire409

    tofire409 Geared up and ready.

    Joined:
    Sep 6, 2009
    Oddometer:
    860
    Location:
    Toronto, CDN
    #3
  4. mapleleafalumnus

    mapleleafalumnus Demigod

    Joined:
    Oct 26, 2008
    Oddometer:
    186
    Location:
    Frozen Wasteland
    Battery overflow tube?
    #4
  5. itsatdm

    itsatdm Long timer

    Joined:
    Jun 19, 2004
    Oddometer:
    5,433
    Location:
    Nor Ca.
    It is a drain hose from your charcoal cannister. There is a recall on it to put on a syphon break and relocate it. It had a bad habit of sucking up water and injecting it into the throttle body.
    #5
  6. 1P8RIOT

    1P8RIOT Been here awhile

    Joined:
    Dec 13, 2007
    Oddometer:
    474
    Location:
    Whitesboro, TX.
    It could also get blown against the cat and melt shut. :dealThat would not be good.
    #6
  7. k Dog

    k Dog Nomad

    Joined:
    May 22, 2005
    Oddometer:
    125
    Location:
    Kamloops, BC Canada
    Spare tube for adding air into the tyres. I don't know why yours doesn't have the proper fitting on it.
    #7
  8. sarathmenon

    sarathmenon Armchair Adventurer

    Joined:
    Mar 29, 2012
    Oddometer:
    1,538
    Location:
    SFO Bay Area
    Thanks. That made my day :D
    #8
  9. sarathmenon

    sarathmenon Armchair Adventurer

    Joined:
    Mar 29, 2012
    Oddometer:
    1,538
    Location:
    SFO Bay Area
    Thanks, I'll get to it for the 6k service. It is a bad location to plumb a hose out, which is what made me curious. I picked this up new 3 months back, and one of the reasons was that BMW has had this model unchanged for 5 years and plenty of time to fix all nagging issues. :lol3
    #9
  10. itsatdm

    itsatdm Long timer

    Joined:
    Jun 19, 2004
    Oddometer:
    5,433
    Location:
    Nor Ca.
    If it is that new, it has the mod. All it is, is a T fitting at the other end that allows air in to prevent vacuum from sucking up water.

    It is no big deal, cut the hose shorter or move it.
    #10