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crank case vent(s)

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  • crank case vent(s)

    Engine case rear (transmission area). There are two vent nipples, a large one and a small one next to each other. What is the small one for? I have nothing on it...should I?
    Larry "Freefam"
    1980 XS11, 40k miles.
    3rd hand 'barn Bike'
    Bringing it back to life.
    Zai-jian!

  • #2
    welcome to the site . many XSers here to assist. it would be of great help to put model/yr on ur signature or on ur post. makes a difference
    Max

    81 XS1100SH Black Beast Mutt
    Kerker 4/1
    stock carbs and air box.
    78 headlite, handle bars,
    1 set of ea-160/85mph guages,
    crash bars, cruise control

    Other 2 Wheelers
    78 XS1100E jet kit, Kerker 4/1, air pods, jet kit-RIP
    94 CBR1000F jet kit,Two Bros pipe, K&N Filter

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    • #3
      Freefam, the larger nipple is the crankcase vent. It should be connected to a hose that runs up to the nipple on the front of the air box, by the carburetors.

      The small nipple is the vent for the middle drive. It should have a small hose on it that runs up between the battery and the air box, underneath the fuel tank to a bracket.
      -- Scott
      _____

      2004 ST1300A: No name... yet
      1982 XJ1100J: "Baby" SS Brakes, '850 FD, ACCT
      1980 XS1100G: "Columbo" SS Brakes, '850 FD, ACCT
      1979 XS1100SF: "Bush" W.I.P.
      1979 XS1100F: parts
      2018 Heritage Softail Classic 117 FLHCS SE: "Nanuk" It's DEAD, it's not just resting. It is an EX cycle.

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      • #4
        Originally posted by 3Phase View Post
        Freefam, the larger nipple is the crankcase vent. It should be connected to a hose that runs up to the nipple on the front of the air box, by the carburetors.

        The small nipple is the vent for the middle drive. It should have a small hose on it that runs up between the battery and the air box, underneath the fuel tank to a bracket.
        +1, 3phase is correct!
        Nathan
        KD9ARL

        μολὼν λαβέ

        1978 XS1100E
        K&N Filter
        #45 pilot Jet, #137.5 Main Jet
        OEM Exhaust
        ATK Fork Brace
        LED Dash lights
        Ammeter, Oil Pressure, Oil Temp, and Volt Meters

        Green Monster Coils
        SS Brake Lines
        Vision 550 Auto Tensioner

        In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

        Theodore Roosevelt

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