VM Carb question.

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • johnod
    Forum Mentor
    Past Site Supporter
    • Apr 2014
    • 278
    • Southern ON Canada

    #1

    VM Carb question.

    79 GS1000S

    VM Carbs, Synched with mercury gauges.

    I'm not much on carbs, so could use some help. Bike starts fine idles pretty good( hunts a bit) runs fine at most any throttle position. The problem is sitting at idle, if i give it the slightest , and I do mean slightest, throttle it just dies, no sputter/cough, just stops.I'm talking about just basically resting your finger tips on the throttle grip, not grabbing a handful. I can get by that, and keep the revs above idle at stop lights so it doesn't stop, when I apply throttle from idle. Any ideas? Thanks.
    1982 Katana 1100, 1997 HD Ultra Classic, 1996 Buell S2T, 2002 BMW K1200RS, 1969 Royal Enfield Interceptor Triton project
    New project 1979 GS1000S
    Recently sold 1979 Honda CBX1000
  • Steve
    GS Whisperer
    • Jun 2005
    • 35925
    • southwest oHIo

    #2
    Airbox installed?

    .
    sigpic
    mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
    hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
    #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
    #2 son: 1980 GS1000G
    Family Portrait
    Siblings and Spouses
    Mom's first ride
    Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
    (Click on my username in the upper-left corner for e-mail info.)

    Comment

    • johnod
      Forum Mentor
      Past Site Supporter
      • Apr 2014
      • 278
      • Southern ON Canada

      #3
      Originally posted by Steve
      Airbox installed?

      .
      Yes stock airbox, new boots as well, V&H 4 into 1 exhaust, dyna S ignition, almost completly stock bike
      1982 Katana 1100, 1997 HD Ultra Classic, 1996 Buell S2T, 2002 BMW K1200RS, 1969 Royal Enfield Interceptor Triton project
      New project 1979 GS1000S
      Recently sold 1979 Honda CBX1000

      Comment

      • Steve
        GS Whisperer
        • Jun 2005
        • 35925
        • southwest oHIo

        #4
        Larger jets installed for the pods and pipe?

        What are the fuel screw (bottom of the carbs) and air screw (side of the carbs) settings?

        .
        sigpic
        mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
        hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
        #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
        #2 son: 1980 GS1000G
        Family Portrait
        Siblings and Spouses
        Mom's first ride
        Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
        (Click on my username in the upper-left corner for e-mail info.)

        Comment

        • 1948man
          Forum Sage
          Past Site Supporter
          • May 2009
          • 4660
          • Florida

          #5
          You say idles good, is that at startup? After it is warm is it idling at a lower rpm. Idle should be set after bike as warm.
          1983 GS 1100 Guided Laser
          1983 GS 1100 G
          2000 Suzuki Intruder 1500, "Piggy Sue"
          2000 GSF 1200 Bandit (totaled in deer strike)
          1986 Suzuki Cavalcade GV 1400 LX (SOLD)

          I find working on my motorcycle mildly therapeutic when I'm not cursing.

          Comment

          • johnod
            Forum Mentor
            Past Site Supporter
            • Apr 2014
            • 278
            • Southern ON Canada

            #6
            Originally posted by Steve
            Larger jets installed for the pods and pipe?

            What are the fuel screw (bottom of the carbs) and air screw (side of the carbs) settings?

            .
            I don't know.
            1982 Katana 1100, 1997 HD Ultra Classic, 1996 Buell S2T, 2002 BMW K1200RS, 1969 Royal Enfield Interceptor Triton project
            New project 1979 GS1000S
            Recently sold 1979 Honda CBX1000

            Comment

            • johnod
              Forum Mentor
              Past Site Supporter
              • Apr 2014
              • 278
              • Southern ON Canada

              #7
              Originally posted by 1948man
              You say idles good, is that at startup? After it is warm is it idling at a lower rpm. Idle should be set after bike as warm.
              Idle is pretty good hot or cold.
              1982 Katana 1100, 1997 HD Ultra Classic, 1996 Buell S2T, 2002 BMW K1200RS, 1969 Royal Enfield Interceptor Triton project
              New project 1979 GS1000S
              Recently sold 1979 Honda CBX1000

              Comment

              • Big T
                Forum LongTimer
                Past Site Supporter
                Super Site Supporter
                • Mar 2005
                • 12392
                • West Slope, OR

                #8
                What idle speed do you have it set at?
                Should be 1100-1200
                1978 GS 1000 (since new)
                1979 GS 1000 (The Fridge, superbike replica project)
                1978 GS 1000 (parts)
                1981 GS 850 (anyone want a project?)
                1981 GPZ 550 (backroad screamer)
                1970 450 Mk IIID (THUMP!)
                2007 DRz 400S
                1999 ATK 490ES
                1994 DR 350SES

                Comment

                Working...