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Carb rebuild time, needle position??

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    Carb rebuild time, needle position??

    I finally got all the parts needed to redo my carbs and started today. I got some carb dip stuff by Gunk called Hydro Seal seems to be working ok, anybody used this before?
    Thanks to Robert for the o-ring kit, mine REALLY needed it.
    My question:
    I just put on my new Vance & Hines 4-1 and the instructions said to rejet to a 130 main, which is what I'm doing. The bike is a canadian model so I have adjustable needles. What position should I set it at now to begin with the bigger main? I had them set to full rich with my old main for it to be even rideable. Stock ones were 112.5 I think.
    Last edited by Guest; 07-28-2008, 10:20 PM.

    #2
    I had to go up from a 115 to a 125 main on my 801000G with an inbox K&N & V&H.
    Ran the needles (I had Canadian needles) at one richer than stock, likely could have got away with shimming for a half space.

    You need to test it & see but that should give you a start. 130 sounds too fat unless you have pods on there...
    The pipe alone should need about 1 full stage richer, maybe not even that. I would try 117.5 first with your K&N inbox max 120's.

    Dan
    1980 GS1000G - Sold
    1978 GS1000E - Finished!
    1980 GS550E - Fixed & given to a friend
    1983 GS750ES Special - Sold
    2009 KLR 650 - Sold - gone to TX!
    1982 GS1100G - Rebuilt and finished. - Sold
    2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!

    www.parasiticsanalytics.com

    TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

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      #3
      I had them set to full rich with my old main for it to be even rideable
      Probably cause carbs needed to be cleaned.

      I would concur that the 117.5 would be a good starting point for your setup..once you get it all together you can tune from there.

      Comment


        #4
        The needles were on the second to last notch as stock, almost full rich. Then i pulled the slides and moved the clip down a notch to make it rideable.
        The 130's will have to do for now, its all i have and it takes a week for the bike shop to get new ones in
        I set the needles clip in the middle for now, I'll see how it runs tomorrow.

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          #5
          very interested to hear how it runs around the half-throttle mark
          130, as mentioned, may be too big
          GS850GT

          Comment


            #6
            Originally posted by psyguy View Post
            very interested to hear how it runs around the half-throttle mark
            130, as mentioned, may be too big
            Yes, that seems a consensus on here, I should have it running today and I will post how it runs.

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              #7
              Bike runs good besides needing a carb sync. Revs hard to redline, clutch slipping much more than before. Much better roll on power from 4k rpm on up
              Might be a little rich, hard to tell with the clutch slipping so much.
              Waiting for my manometer from Z1, seems to be taking forever

              Comment


                #8
                well, i guess if the plugs dont get fouled with excess gas and you're happy with how it runs, then thats it
                GS850GT

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