no top end after jet kit installed

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  • bartmancometh
    • Jan 2026

    #1

    no top end after jet kit installed

    so i have an 80 750 with pods and a 4-1.... blah blah stupid cafe racer.

    after i installed the dynojet stage 3 kit, it idles great and accelerates smoothly until i get to about 6k rpm. then it just wont go any more.

    i have moved the need spacing through all the options. its currently at 2nd from the top. i found that this lets me get to at least 6 or 7k rpms instead of 5.

    the main jets are 130 my guess is that they need to be bigger 135 or 140?
  • Agemax
    Forum Guru
    • Apr 2008
    • 8371
    • plymouth uk

    #2
    DJ kits come with 2 different size mains, have you tried both sizes?
    1978 GS1085.

    Just remember, an opinion without 3.14 is just an onion!

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    • tkent02
      Forum LongTimer
      Past Site Supporter
      • Jan 2006
      • 35571
      • Near South Park

      #3
      Originally posted by bartmancometh
      it idles great and accelerates smoothly until i get to about 6k rpm. then it just wont go any more.
      Full throttle? Partial throttle? When it stops accelerating is it rich or lean?
      http://img.photobucket.com/albums/v5...tatesMap-1.jpg

      Life is too short to ride an L.

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      • bartmancometh

        #4
        its at about half throttle. i dont know if its lean or rich. no back fireing or anything when i let off.

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        • gearhead13

          #5
          Did you install the main air correctors? They are included in the kit.

          Comment

          • Maddevill

            #6
            From around 3/4 throttle to open you're on the main jet. You need to try one way or the other size wise. The problem will either get better or much worse.

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