carb swap

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  • mastan
    XStremely XSive
    • Jul 2002
    • 349
    #1

    carb swap

    Do you guys know whether or not carbs from a 79 special will fit a 78e? I checked the Yamaha parts fiche and the carb bodys are the same part number. Is there any thing I have to do to make this work?
    TIA,
    Mark Stanton
    78XSe
    Tags: None
    • John
      XS-XJ Super Guru
      • Oct 2003
      • 5117
      #2
      They are a plug and play item. Just make sure you keep the fuel and vent hoses routed proper;y.

        Comment

        • TopCatGr58
          Administrator
          • Jul 2002
          • 12650
          • Portsmouth, Va.
          #3
          Mark,

          The only difference according to the manual is the size of the starter jet, so it should be pretty much a bolt-n-go situation, just synch and pilot adjust! Enjoy!
          T.C.
          T. C. Gresham
          81SH "Godzilla" . . .1179cc super-rat.
          79SF "The Teacher" . . .basket case!
          History shows again and again,
          How nature points out the folly of men!

            Comment

            • mastan
              XStremely XSive
              • Jul 2002
              • 349
              #4
              TC:
              Are the starter jets something that must be changed, or is it fine to leave them as they are. I got the carbs today and was wondering about the choke lever. Is the choke lever on the specials bent at an angle or straight like my standard?
              TIA,
              Mark Stanton

                Comment

                • GNEPIG
                  XS-XJ Guru
                  • Apr 2005
                  • 1647
                  • fl
                  #5
                  .. i dont think there is a difference in the starter jets, if there is it would be small. i'd say just try them. as far as the difference in the levers i think you can interchange them. the special levers are bent out some, or yours has been subject to xsive force.

                    Comment

                    • John
                      XS-XJ Super Guru
                      • Oct 2003
                      • 5117
                      #6
                      The choke levers are interchangable. They are different in appearence, though. If you look at the lever from the side of the bike, the rubber coated handle will be to the right of the main body of the lever for a Standard, and on a Special it is to the left.

                        Comment

                        • mastan
                          XStremely XSive
                          • Jul 2002
                          • 349
                          #7
                          On the carbs that I got, all four float bowls and all four tops are chromed. Is that stock for a special? The choke lever is also chromed. On my standard, only the outside tops are chrome and none of the bowls are. If I decide to try to straighten the choke lever, is there a safe way to do it without weakening the metal too much. If I decide to replace the choke lever, it looks like the pivot point is some kind of rivet. Can I get around that, or should I just drill it out and re-rivet?
                          Thanks guys,
                          Mark Stanton

                            Comment

                            • GNEPIG
                              XS-XJ Guru
                              • Apr 2005
                              • 1647
                              • fl
                              #8
                              .. I would just change the whole choke assembly via the two screws that hold it to the carb , if you had too. i dont know which carbs you have, all of the later model carbs[80-82] came with chrome caps. no models came with chrome float bowls, those are a bonus for you
                              early model carbs have three holes in the ventury[not including the large one that looks like a frown at the top]
                              the late carbs have four vent holes in the ventury

                                Comment

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