Carb jet conversion

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  • madmax-im
    Master of XSology
    • Sep 2007
    • 6751
    • Southern Comfort...Wendell NC

    #16
    cool

    Thanks DB....
    1980 XS650G Special-Two
    1993 Honda ST1100

    Comment

    • madmax-im
      Master of XSology
      • Sep 2007
      • 6751
      • Southern Comfort...Wendell NC

      #17
      ok just checked out the parts cache and I found what DB was referring to however... there were two sizes given for a main jet...one said #170.0 and another listed says #112.5 so just wondering abt this?
      1980 XS650G Special-Two
      1993 Honda ST1100

      Comment

      • randy
        XS-XJ Guru
        • Dec 2003
        • 4521

        #18
        Ben,

        I just checked the fiche. Your main jet is part #40 on the list. the other one is a main AIR jet. Your stock main jets are 112.5 .


        40 620-14231-73-00 JET, MAIN (#112.5)

        Comment

        • randy
          XS-XJ Guru
          • Dec 2003
          • 4521

          #19
          Also, the table says go up 1 PILOT jet size for every 3 main size increases. So you'll need one size larger pilot jet. Your stock pilot is #47.5, one up would be a #50.

          Comment

          • dbeardslee
            XS-XJ Super Guru
            • Nov 2007
            • 4385
            • Maineville, OH

            #20
            Sorry about the confusion. I should have looked more closely.
            I think I have a loose screw behind the handlebars.

            '79 XS11 Standard, Jardine 4/1, Dyna DC1-1 Coils, 145 mains, 45 pilots, plastic floats - 25.7mm, XV920 fuel valves, inline fuel filters, speed bleeders, Mikes XS pods, spade-type fuse block, fork brace, progressive fork springs/shocks, manual petcocks, 750 FD, Venture cam chain tensioner, SS brake lines

            Comment

            • geniusloerts
              XStremely XSive
              • Jul 2007
              • 420
              • fayetteville, Arkansas

              #21
              hey, just a fast uestion while the subject is up, will the jets from Mikesxs.com work? they are for mikuni carbs.
              1979 XS1100 SF "Black Goblin"
              -Pod Filters
              -4-1 pipe
              -larger jets for carbs
              1982 XJ1100 "Black Sheep"

              Comment

              • dbeardslee
                XS-XJ Super Guru
                • Nov 2007
                • 4385
                • Maineville, OH

                #22
                Genius,

                I just put n100/604 mains and bs 80/96 type pilots in mine and they work great. I got them from Jets R Us but mikesxs has the same parts for less money.

                DB
                I think I have a loose screw behind the handlebars.

                '79 XS11 Standard, Jardine 4/1, Dyna DC1-1 Coils, 145 mains, 45 pilots, plastic floats - 25.7mm, XV920 fuel valves, inline fuel filters, speed bleeders, Mikes XS pods, spade-type fuse block, fork brace, progressive fork springs/shocks, manual petcocks, 750 FD, Venture cam chain tensioner, SS brake lines

                Comment

                • madmax-im
                  Master of XSology
                  • Sep 2007
                  • 6751
                  • Southern Comfort...Wendell NC

                  #23
                  Thanks Randy!I will be looking as to where to find the best prices...although this isnt expensive right?...so applying the rest of the formula to what we now know...112.5 stock size...up 4 jet sizes over stock * 2.5 = 10 so the new jetting should be 122.5 coupled with the pilot jet going from 47.5 to 50.0
                  Last edited by madmax-im; 03-22-2008, 09:14 PM.
                  1980 XS650G Special-Two
                  1993 Honda ST1100

                  Comment

                  • madmax-im
                    Master of XSology
                    • Sep 2007
                    • 6751
                    • Southern Comfort...Wendell NC

                    #24
                    one further question

                    Seeing that I bought the Dynojet kit last year...it has occurred to me that there might be better brands or manufacturers...any suggestions...?
                    1980 XS650G Special-Two
                    1993 Honda ST1100

                    Comment

                    • madmax-im
                      Master of XSology
                      • Sep 2007
                      • 6751
                      • Southern Comfort...Wendell NC

                      #25
                      Learning quickly

                      Ok I think I will go with the Mikuni jets...lol...one problem i see on the jets r us site is that four sizes over stock (112.5) is actually 125.0 so thats not exactly what i was expecting in terms of the formula previously applied..comments?
                      Last edited by madmax-im; 03-22-2008, 10:03 PM.
                      1980 XS650G Special-Two
                      1993 Honda ST1100

                      Comment

                      • dbeardslee
                        XS-XJ Super Guru
                        • Nov 2007
                        • 4385
                        • Maineville, OH

                        #26
                        I looked at MikesXS and their main jet sizes jump from 120 to 125 also. They do have a 122.5 main jet, but it's the kind with the small head.
                        Last edited by dbeardslee; 03-22-2008, 10:13 PM.
                        I think I have a loose screw behind the handlebars.

                        '79 XS11 Standard, Jardine 4/1, Dyna DC1-1 Coils, 145 mains, 45 pilots, plastic floats - 25.7mm, XV920 fuel valves, inline fuel filters, speed bleeders, Mikes XS pods, spade-type fuse block, fork brace, progressive fork springs/shocks, manual petcocks, 750 FD, Venture cam chain tensioner, SS brake lines

                        Comment

                        • randy
                          XS-XJ Guru
                          • Dec 2003
                          • 4521

                          #27
                          Cycle Recycle has the mains, but not the pilots.

                          CRC2online

                          Comment

                          • red bandit
                            XSive Maximus
                            • May 2005
                            • 950
                            • central michigan

                            #28
                            Stock pilot jets are 42.5 not 47.5. I think Randy had a typo. If you put a 50 pilot jet in....it's way to big.
                            79 F full cruiser, stainless brake lines, spade fuses, Accel coils, modded air box w/larger velocity stacks, 750 FD.
                            79 SF parts bike.

                            Comment

                            • randy
                              XS-XJ Guru
                              • Dec 2003
                              • 4521

                              #29
                              For a 79 standard, you're right.

                              Look up the fiche for an 82 XJ, it lists 47.5 pilots.

                              Comment

                              • red bandit
                                XSive Maximus
                                • May 2005
                                • 950
                                • central michigan

                                #30
                                I thouhgt he was talking about an xs. SORRY.
                                79 F full cruiser, stainless brake lines, spade fuses, Accel coils, modded air box w/larger velocity stacks, 750 FD.
                                79 SF parts bike.

                                Comment

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