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Carbs - Carburetors

Discussion in 'The Garage' started by inxs, Oct 4, 2009.

  1. inxs

    inxs xx

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    CV Carbs - one of the best how-to manuals ive found for the original carbs

    http://www.amckayltd.com/carbguide.pdf

    VM Carbs - the same for mikuni roundslide carbs

    www.amckayltd.com/VM34-36.pdf

    Carb Basics - a quickie

    http://star.walagata.com/w/sundialmotosport/C._Carb_repair_helpfull_hints.pdf

    Carb Theory - a nice basic theory description for carb jetting

    http://www.iwt.com.au/mikunicarb.htm

    Mikuni VM - mikuni manual

    http://www.mikuni.com/pdf/vmmanual.pdf

    CV tuning...link for low rev and high rev motors

    http://www.factorypro.com/tech/carbtun.html



    - BS38-34 oem jet settings ... u.s
    [​IMG]

    - pilot jets
    [​IMG]

    - setting the float
    [​IMG]
     
    Last edited: Aug 6, 2010
    geedubya likes this.
  2. inxs

    inxs xx

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    - cutaway schematic for a CV carb...eg. BS34..BS38..Keihin
    [​IMG]
     
    geedubya likes this.
  3. Thanks for all these infos INXS. I've save it on my laptop for future reference.
     
  4. inxs

    inxs xx

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    - see here for dell orto carb info
     
  5. inxs

    inxs xx

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    - another CV schematic

    [​IMG]
     
    geedubya likes this.
  6. Love this kind of info. We need a sticky that links to threads like this!
     
  7. Win, never noticed that section haha. :doh:
     
  8. that's actually the clearest i've ever seen it explained.
     
  9. Ironsled77

    Ironsled77 XS650 GRAND HACK

    Inxs I would love to see all the info you have on your computer! Keep it coming it is much appreciated
     
  10. hawk

    hawk XS650 New Member

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    I have a 1983 Heritage Special (USA) it has an idle sync screw between the carbs. It was backed all the way out. How do I adjust it so I can adjust both carbs idle from the carb on the left side?
     
  11. get vacuum gauges on them, run the bike, turn the screw until they match.

    If it's backed right off, the bike must not run very well, and vibrate like crazy.
     
  12. xsjohn

    xsjohn 8-1 lover

    I didn't read all the post but.......Remember the sync screw only raises and lowers the right carb.......... left being controled by the idol stop screw..........

    xsjohn
     
  13. trucker chuck

    trucker chuck XS650 Member

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    should there be a rubber plug at the bottom of pj
     
  14. Only for 34's.
     
  15. What is the point of the plug for the pilot jet. From the illustration in lookslike it prohibits flow? What happens if you don't use the plugs?
     
  16. xsjohn

    xsjohn 8-1 lover

    The BS34 has a closed circuit pilot jet.........the pilot jet feeds through the main jet.... if you leave the black plug off the main jet now becomes the side feet hole under the rubber plug and above the main jet............

    You have to think of a ship full of these coming into port with the EPA standing there to test them......just think if they were in control of light aircraft...........

    Good carbs but the jets and needles are epa...........everything suffers with that.......

    xsjohn
     
  17. Hmmm. Well I'm about to rebuild my carbs and install those very cool needles I got in the mail. I'm not sure if I noticed the plugs there before?
     
  18. xsjohn

    xsjohn 8-1 lover

    THe black plugs can dry out and not fit in snug......and be lost when you dismantle the carbs.......the bowl pushes the black plug tightly to the rim of the tower where they fit.......

    It's good to make the timing on these TCI bikes adjustable too........they are a bit advanced......someone's wild idea to turn these wobbly 360 pressed cranks to 7K.....cringe.....and leave the lower rpms suffering..........

    xsjohn
     

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