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Tuning a Discover's carb.

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  • #1

    Tuning a Discover's carb.

    hey guys...... need some help here..... was fiddling around with the carb of my discover.... the bike comes with a kehin carb...... wanted to know i the bike will richen out if i were to turn the airscrew clockwise or anticlokwise????? pls help..... thks
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  • #2
    Query Approved.
    :)

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    • #3
      Discover-guy to the rescue: Turning it clockwise will richen the mix and vice versa.
      Actually to avoid this confusion here's the confirmed way:Turning the SCREW out will lean the mixture and turning the SCREW in (clockwise) will richen the mixture.
      Edit 1:The Discover has a Mikuni in my opinion. I will check.
      Edit 2: I am sorry,it a Keihin. My bad. It's the Gladiator effect at work.
      Last edited by nightwing; 12-20-2008, 02:20 AM.
      sigpic
      "Some rise by sin, and some by virtue fall."

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      • #4
        Originally posted by nightwing View Post
        Discover-guy to the rescue: Turning it clockwise will richen the mix and vice versa.
        Actually to avoid this confusion here's the confirmed way:Turning the SCREW out will lean the mixture and turning the SCREW in (clockwise) will richen the mixture.
        Edit 1:The Discover has a Mikuni in my opinion. I will check.
        Edit 2: I am sorry,it a Keihin. My bad. It's the Gladiator effect at work.
        It doesn't apply to all carbs in general. If the screw is at the front part of the carb, then it controls the fuel flow. Hence, SCREW in will lean out the mixture and vice versa.

        If the screw is located at the rear part of the carb, then it controls air flow. Hence, what you said works.

        Correct me if I am wrong.

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        • #5
          Originally posted by hyper View Post
          It doesn't apply to all carbs in general. If the screw is at the front part of the carb, then it controls the fuel flow. Hence, SCREW in will lean out the mixture and vice versa.

          If the screw is located at the rear part of the carb, then it controls air flow. Hence, what you said works.

          Correct me if I am wrong.
          He was asking about the tuning of the airscrew of the Discover.And in the Discover it's located at the front of the carb. It's the Keihin NCV Z63.
          I wish I had my Discover,so that I could explain it with pics.
          sigpic
          "Some rise by sin, and some by virtue fall."

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          • #6
            Finally found a pic among my collection that shows the screw.

            *I am a dunce.Wrong screw.*
            Last edited by nightwing; 12-25-2008, 10:14 PM.
            sigpic
            "Some rise by sin, and some by virtue fall."

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            • #7
              Originally posted by nightwing View Post
              Finally found a pic among my collection that shows the screw.

              thats not the airscrew baba....... was referring to the screw on the left of the carb..... and as hyper said it depends on where the air screw is situated either at the back or the front of the carb... just wanted to confirm.....thks guys...........more feedback pls

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              • #8
                Originally posted by aaron View Post
                thats not the airscrew baba....... was referring to the screw on the left of the carb..... and as hyper said it depends on where the air screw is situated either at the back or the front of the carb... just wanted to confirm.....thks guys...........more feedback pls
                It isnt? That's news for me. That's the idling screw,isnt it?
                Last edited by nightwing; 12-24-2008, 02:44 PM.
                sigpic
                "Some rise by sin, and some by virtue fall."

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                • #9
                  my bike is 4 1/2 yrs old...... am plannin on some performance mods on it...... how feasible would it be for me......
                  am planning on trying out the pulsar 150 carb. on my discover125... what do u think would be the benefits????

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                  • #10
                    Originally posted by aaron View Post
                    my bike is 4 1/2 yrs old...... am plannin on some performance mods on it...... how feasible would it be for me......
                    am planning on trying out the pulsar 150 carb. on my discover125... what do u think would be the benefits????
                    instead of changing the carb why not just upjet it and put a new air filter that allows more air inside .

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                    • #11
                      Re: Tuning a Discover's carb.

                      Originally posted by Puneet1 View Post
                      instead of changing the carb why not just upjet it and put a new air filter that allows more air inside .
                      Have anyone tried Pulsar 150s carb on discover 125 please reply guys.??

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