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Thread: Bing CV carb position/level

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  1. #1
    Registered User
    Join Date
    Jan 2013
    Location
    Iowa
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    20

    Bing CV carb position/level

    Ok airhead gurus,

    Just finished spline lube on tranny and putting the r100s back together- how I love repair manuals that say
    "Make sure to position carb properly" without giving diagrams or explaining! So far searches on topic have been unfruitful- How are you supposed to position carbs angle/rotation wise? Pivot in/out or level and what do you use as point of reference? Thank you!

  2. #2
    Registered User
    Join Date
    Sep 2009
    Location
    north central ohio
    Posts
    35

    Question

    This is a good question! For my '77 R100S I used a pocket level across the tops and simply set both level. There is a certain amount of inclination that's already built in so not much variation allowed there.

    Seems like you would not want too much tilt as it would affect the float level?

    Inquiring minds want to know!

  3. #3
    Monza Blue 1974 R90/6
    Join Date
    Dec 2006
    Location
    Delaware
    Posts
    416
    This is a topic for debate.

    There have been a couple of folks who recommend tilting the carbs slightly inward to reduce the bend at the end of the throttle cable. I think the angle of 10 degrees has been thrown about.

    Others swear by level.



    Barron

  4. #4
    Registered User donbmw's Avatar
    Join Date
    Feb 2004
    Location
    Monroe La.
    Posts
    432
    I just eye ball mine. Never felt I had by issue doing it this way.

    Don
    1975 R90/6, 1980 and 1982 R65, !959 TR3A Triumph Car

  5. #5
    James.A
    Guest
    Quote Originally Posted by donbmw View Post
    I just eye ball mine. Never felt I had by issue doing it this way.

    Don
    I agree.

  6. #6
    moosehead
    Guest
    Yep. I eyeball mine as well for perpendicular orientation.

    Stand behind bike and "eyeball" that both carbs are perpendicular...straight up and down.

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