BMW 650 X Country Gas Tank

Discussion in 'Thumpers' started by hisandhers, Nov 13, 2012.

  1. hisandhers

    hisandhers Adventurer

    Joined:
    Jun 11, 2010
    Oddometer:
    37
    Location:
    Raleigh, NC
    I have a 650 Cross Country with a newly installed Hotrod Welding auxiliary gas tank. The tank is a work of art!
    I apparently have an air leak as it pulls fuel from the bike's tank before the auxiliary tank.

    Anyone find and typical air leak areas?
    #1
  2. ridepjride

    ridepjride Migrant

    Joined:
    Jan 28, 2006
    Oddometer:
    326
    Location:
    Northern California
    I have an X Challenge with the same tank. When I first intalled it, it took awhile to start drawing down. I was worried, but after filling up again it worked, as it has since.
    I used a MityVac to test the main tank for leaks by hooking up to the end of the vent hose and drawing a vacuum. If you can maintain vacuum there, the cap is sealing good.
    Hope this helps.
    #2
  3. hisandhers

    hisandhers Adventurer

    Joined:
    Jun 11, 2010
    Oddometer:
    37
    Location:
    Raleigh, NC
    That's good advice, will test the vacuum.

    I ordered a new gas cap anyway; think mine does have a minor leak. Got the keyless one since it's a little tight under
    the HB panniers to get the key in without removing the pannier.

    Thanks!!!
    #3