Main Fuel Jet.

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  • javamotorsports

    #1

    Main Fuel Jet.

    Hello,

    Does anyone know what size I would need to go up to to jump up two sizes on the main jet? on my GS850? I have the baffels cut out of the cans and rejetting is the cost affective method for now. Thanks
  • Seana23

    #2
    Hi babes.
    I think they are 115's as standard...
    And they go up in 5's...
    So 125's...?
    Sure someone else will be more certain...
    Mine had 115's when i got it.
    Xxx

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    • BigD_83
      Forum Sage
      Past Site Supporter
      • May 2011
      • 4872
      • Vancouver

      #3
      Not saying you are wrong, Seana, as you might not be able to source them in the UK, but we can get the mains in increments of 2.5 over here, at least for the BS34s.
      '83 GS650G
      '83 GS550es (didn't like the colours in the 80's, but they've grown on me)

      Comment

      • hampshirehog
        Forum LongTimer
        Past Site Supporter
        • Oct 2007
        • 12675
        • Hampshire. UK

        #4
        Originally posted by BigD_83
        Not saying you are wrong, Seana, as you might not be able to source them in the UK, but we can get the mains in increments of 2.5 over here, at least for the BS34s.
        2.5s here in the UK as well.

        At Proweb we can provide you with a range of web services designed to vastly improve your online presence.
        79 GS1000S
        79 GS1000S (another one)
        80 GSX750
        80 GS550
        80 CB650 cafe racer
        75 PC50 - the one with OHV and pedals...
        75 TS100 - being ridden (suicidally) by my father

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        • Seana23

          #5
          Do'h!

          Sorry.
          X

          See, i said someone else.would chip.in.... Glad they did!

          Comment

          • Seana23

            #6
            I couldn't see any prices... How much are the jets?

            X

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            • 5150/gs

              #7
              I was in a bind over the weekend and needed to drill out a jet and found this cross referance chart and thought it might go in the tech archives. Let me know what you think. Keihin, Dynojet, Mikuni Jet Size Cross Reference All Hole Diameters Are in Inches Hole Dia"---Keihin # -- DynoJet # --...

              Comment

              • Steel Toed Tank

                #8
                GREAT LIST!!

                let me post it here for GS's sake

                Hole Dia?---Keihin # -- DynoJet # -- Mikuni #
                0.0350---- 92.5--------- 92----------- 86.3
                0.0360---- 95----------- 94----------- 88.1
                0.0370---- 97.5--------- 96----------- 90
                0.0380---- 100---------- 98----------- 91.9
                0.0390---- 102.5------- 100---------- 93.8
                0.0400---- 105--------- 102---------- 95.6
                0.0410---- 107.5------- 104---------- 97.5
                0.0420---- 110--------- 106---------- 99.4
                0.0430---- 112.5------- 108--------- 101.3
                0.0440---- 115--------- 110--------- 103.1
                0.0450---- 117.5------- 112--------- 105
                0.0460---- 120--------- 114--------- 106.9
                0.0470---- 122.5------- 116--------- 108.8
                0.0480---- 125--------- 118--------- 110.6
                0.0490---- 127.5------- 120--------- 112.5
                0.0500---- 130--------- 122--------- 114.4
                0.0510---- 132.5------- 124--------- 116.3
                0.0520---- 135--------- 126--------- 118.1
                0.0530---- 137.5------- 128--------- 120
                0.0540---- 140--------- 130--------- 121.9
                0.0550---- 142.5------- 132--------- 123.8
                0.0560---- 145--------- 134--------- 125.6
                0.0570---- 147.5------- 136--------- 127.5
                0.0580---- 150--------- 138--------- 129.4
                0.0590---- 152.5------- 140--------- 131.3
                0.0600---- 155--------- 142--------- 133.1
                0.0610---- 157.5------- 144--------- 135
                0.0620---- 160--------- 146--------- 136.9
                0.0630---- 162.5------- 148--------- 138.8
                0.0640---- 165--------- 150--------- 140.6
                0.0650---- 167.5------- 152--------- 142.5
                0.0660---- 170--------- 154--------- 144.4
                0.0670---- 172.5------- 156--------- 146.3
                0.0680---- 175--------- 158--------- 148.1
                0.0690---- 177.5------- 160--------- 150
                0.0700---- 180--------- 162--------- 151.9
                0.0710---- 182.5------- 164--------- 153.8
                0.0720---- 185--------- 166--------- 155.6
                0.0730---- 187.5------- 168--------- 1575
                0.0740---- 190--------- 170--------- 159.4
                0.0750---- 192.5------- 172--------- 161.3
                0.0760---- 195--------- 174--------- 163.1
                0.0770---- 197.5------- 176--------- 165
                0.0780---- 200--------- 178--------- 166.9
                0.0790---- 202.5------- 180--------- 168.8
                0.0800---- 205--------- 182--------- 170.6
                0.0810---- 207.5------- 184--------- 172.5
                0.0820---- 210--------- 186--------- 174.4
                0.0830---- 212.5------- 188--------- 176.3
                0.0840---- 215--------- 190--------- 178.1
                0.0850---- 217.5------- 192--------- 180
                0.0860---- 220--------- 194--------- 181.9
                0.0870---- 222.5------- 196--------- 183.7
                0.0880---- 225--------- 198--------- 185.6
                0.0890---- 227.5------- 200--------- 187.5



                Tank

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                • Riding Again

                  #9
                  Jets are normally in packs of 4 (perfect for us ) with prices from $4 on amazon to $14 at other online shops. Don't know which are authentic mikuni's or knock-offs though.

                  Comment

                  • 5150/gs

                    #10
                    Yes Tank, i have posted it a few times,started a thread for it but i was told there is a link for it on Basscliffs website, so it died fast.Still never looked for it there ,just made it a Favorite link for reference.

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