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  • #1

    Non-Stock Carbs

    Hopefully there is some good info out there. I have noticed that some of the knowledge base listed using Mikuni VM 33 carbs on there XS1100. The bike I have a 79 XS1100SF came with them installed. A VM33/A19 with a 135 Main and a 2.8 Float Valve. The other jets looK like they have not been touched. I have torn down the carbs and they set new standards in filthy. Order new gaskets (very hard, very slow) but the will all be here soon. I know the carb is discontinued and very little data on it. Also I know that I do not need the vaccum petcock on the gas tank and would like to swith to a off/on/rsv replacement. The vacoum line on the carb is capped off. The only other mod to the breathing system is a set of Kerker 4-1, and pollished ports.
    When I removed the head there was a significant amount of carbon on the Pistons, but that could be alot of things. Anybody have any info on this carb and if I should change the jetting, or different float height, or anything else before I put it all back together. Thanks for the help.
    Tags: None
  • #2
    Originally posted by whiskey pete View Post
    Anybody have any info on this carb ...
    yeah, those things are like platinum. Unless they offered a relatively large performance gain, I would sell them. Those things go for CRAZY high prices on eBay. IIRC, mro had a set on his hotrod.
    '81 XS1100 SH

    Melted to the ground during The Valley Fire

    Sep. 12th 2015

    RIP

    Comment

    • #3
      I have a set of VM33-A19

      on my G. Once I got them dialed in, I like them just fine. It took me a while though since I was used to BS34's. Here's a link to George Fix ...there's more info here to look at. Do you have a dual cable throttle system on there yet?
      80G Mini-bagger
      VM33 Smooth bores, Pods, 4/1 Supertrapp, SS brake lines, fork brace

      Past XS11s

      79F Stone stocker and former daily driver, sold May '10 now converting for N.O. to cafe style
      79SF eventually dismantled for parts
      79F Bought almost new in 80, sold for a house
      79F The Ernie bike sold to a Navy dude summer 08
      79SF Squared-off Special, Vetter/Bates tour pkg., Mikes XS coils, G rear fender and tail light. Sold June 09

      Comment

      • #4
        Yes, it runs a dual cable through a bell crank

        Comment

        • #5
          Bell crank?

          I used to use a bell crank on U-control flying models ... would love to see a photo of how that works, looks and how it's mounted.
          80G Mini-bagger
          VM33 Smooth bores, Pods, 4/1 Supertrapp, SS brake lines, fork brace

          Past XS11s

          79F Stone stocker and former daily driver, sold May '10 now converting for N.O. to cafe style
          79SF eventually dismantled for parts
          79F Bought almost new in 80, sold for a house
          79F The Ernie bike sold to a Navy dude summer 08
          79SF Squared-off Special, Vetter/Bates tour pkg., Mikes XS coils, G rear fender and tail light. Sold June 09

          Comment

          • #6
            81xsproject
            IIRC, mro had a set on his hotrod.
            VM33/A19 ??? Nope

            I'm a little more XSive than that

            RS36 smoothbores, with a pump on #2




            mro

            Comment

            • #7
              Two of the carbs are off the rail and in the solvent, the other two are still intact so I can see how to put them back together. I will get a picture of those bad boys posted soon. Stamped into the side of the main carb body is the code 33A19....I didn"t do something stupid and order the wrong parts did I?????????

              Comment

              • #8
                Why don't ya' clean them damn thangs up, Mike? Paint um while yer at it

                The smooth bores I have really feel like an acc. pump would be a welcome addition. As they are now, care needs to be taken starting up off idle. If the throttle and clutch are not applied pretty smoothly, it could stall.
                80G Mini-bagger
                VM33 Smooth bores, Pods, 4/1 Supertrapp, SS brake lines, fork brace

                Past XS11s

                79F Stone stocker and former daily driver, sold May '10 now converting for N.O. to cafe style
                79SF eventually dismantled for parts
                79F Bought almost new in 80, sold for a house
                79F The Ernie bike sold to a Navy dude summer 08
                79SF Squared-off Special, Vetter/Bates tour pkg., Mikes XS coils, G rear fender and tail light. Sold June 09

                Comment

                • #9
                  According to the Sudco book ...

                  there were -A19 D40 for XS1100 and -A19 D45 for Kawasaki. Main and pilot jets were different ... 17.5 and 132.5 for Yam and 20 and 125 for the Kaw.

                  My set has 125s and 20s ... ?? Runs well far beyond the 'chicken out' point as far as I'm concerned. I probably could get it a bit slicker by playing with the discs in the SuperTrapp some but I'm OK with it the way it is for now.
                  80G Mini-bagger
                  VM33 Smooth bores, Pods, 4/1 Supertrapp, SS brake lines, fork brace

                  Past XS11s

                  79F Stone stocker and former daily driver, sold May '10 now converting for N.O. to cafe style
                  79SF eventually dismantled for parts
                  79F Bought almost new in 80, sold for a house
                  79F The Ernie bike sold to a Navy dude summer 08
                  79SF Squared-off Special, Vetter/Bates tour pkg., Mikes XS coils, G rear fender and tail light. Sold June 09

                  Comment

                  • #10
                    According to the Sudco book ...

                    There web site has a lot of info, good parts break down as well as some jetting applications ...
                    but it sure is a pain to find "COMPLETE" info there

                    Why don't ya' clean them damn thangs up, Mike? Paint um while yer at it
                    Guess I been slacking some
                    Wait till you see what I've been doing to what those carbs are attached to


                    mro

                    Comment

                    • #11
                      Can't hardly wait to see what yer cookin' up for them carbs ... goin' on that Miriam, eh? Somethin' else?

                      I have the actual book, Sudco part number #002-999 which came with a bike I bought once. I've seen that website before too ... it's a lot more comprehensive than the book which is vintage now. lol
                      80G Mini-bagger
                      VM33 Smooth bores, Pods, 4/1 Supertrapp, SS brake lines, fork brace

                      Past XS11s

                      79F Stone stocker and former daily driver, sold May '10 now converting for N.O. to cafe style
                      79SF eventually dismantled for parts
                      79F Bought almost new in 80, sold for a house
                      79F The Ernie bike sold to a Navy dude summer 08
                      79SF Squared-off Special, Vetter/Bates tour pkg., Mikes XS coils, G rear fender and tail light. Sold June 09

                      Comment

                      • #12
                        goin' on that Miriam, eh?
                        Not a chance, they would flood out a stock 11,
                        and the Merriam is a keeper just as it is ...
                        so they will be going back on Somethin' else


                        mro

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