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  • buff

    #1

    carbs

    hi, i have just bought some carbs off ebay for my gs1000 hc, the carbs i have got on at the moment are attached to the standed airbox, but the one i have bought have the bellmouths on, and have been jetted, do you think i should take the airbox off and put the new carbs on with the bellmouths or should i take the bellmouths off and attach them to the airbox, could anyone advise me what would be the best thing to do. thanks steve.
  • Dave8338
    Forum LongTimer
    Past Site Supporter
    • Aug 2006
    • 11608
    • Annandale, MN

    #2
    Welllllllllll...if the carbs that you bought have velocity stacks on them, there is a good chance that they have been rejetted. If your running stock exhaust, you'll most likely be running too rich. You'll have to pull the bowls and have a look at the jets, making sure they match the ones that you have in your bike now.

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    • 80GS750

      #3
      what are velocity stacks? im not sure what you guys are talking about

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      • Dave8338
        Forum LongTimer
        Past Site Supporter
        • Aug 2006
        • 11608
        • Annandale, MN

        #4
        Originally posted by 80GS750
        what are velocity stacks? im not sure what you guys are talking about
        A velocity stack is a tapered or fluted piece that fits on the intake side of the carb bodies. They are used to increase the air flow into the carbs and keep it flowing at a directed rate without the creation of a vortex at the intake throat of the carb body. :shock:

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        • t3rmin

          #5
          Random observation: I noticed the rubber airbox boots on my 750 have a velocity stack-esque shape. Of course they terminate inside the airbox, so who knows if it makes a difference or not...

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          • 80GS750

            #6
            so its the same shape as a tapered pod filter but does not filter anything? then you add a filter to it right?

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            • t3rmin

              #7
              Originally posted by 80GS750
              so its the same shape as a tapered pod filter but does not filter anything? then you add a filter to it right?
              You generally see them on racebikes, sans filter.

              Here's a pic (found on Google images):

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              • Dave8338
                Forum LongTimer
                Past Site Supporter
                • Aug 2006
                • 11608
                • Annandale, MN

                #8
                Originally posted by t3rmin
                You generally see them on racebikes, sans filter.

                Here's a pic (found on Google images):
                http://www.kingbirdmotoring.com/GS55...tacks_left.jpg
                A picture is worth a thousand words.... \\/

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                • 80GS750

                  #9
                  ok, thats what i was imagining, i have seen those on older cars too on top of the carbs... duh

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