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  • #1

    Calling all bikers...

    Need a abit of advice really...

    One of our familey members owns a YBR125,

    The problem is everytime he accelerates to 10,000 revs the bike just simply "cuts out", all the nessaccery parts have been changed or tested

    tested the carb - not that

    new plug - not that


    any ideas

    all help much apreciated


    Regaurds James
    If at first you don't succeed, redefine success
    Tags: None
  • #2
    Cuts out as it wont rev any harder but still runs, or dies completely?
    Maybe it has a rev limiter...
    it's in me shed, mate.

    Comment

    • #3
      dont think it has a rev limiter, it should rev all the way to 12,000

      as soon as he hits 10,000 the bike completeley die, once you pull over and try to kick it, it takes a good 12 kicks to get it going again....

      but starts 1 or 2 second kick every morn...
      If at first you don't succeed, redefine success

      Comment

      • #4
        The CDI unit probably needs replacing. Check the exhaust for restrictions too.

        Comment

        • #5
          What colour is the spark plug? Is the throttle slide going all the way up? is the main jet clean and the needle straight?
          {Edit} scratch that it's fuel injection!
          it's in me shed, mate.

          Comment

          • #6
            Is the fuel tank venting properly?
            Try running it with the filler cap off
            What have I told you about thinking Erroll

            Comment

            • #7
              check air filter and inlet tubing
              it does sound like the CDi unit as Vince says could be the cause
              Surf.gone but not forgottendisco now gone aswell

              Comment

              • #8
                it sounds like carb freeze its when the cold weather restricts the petrol flow and floods the carb you can try silkaline pro fst addative or or wyns dry ,two capfuls to a full tank can buy from halfords.

                Comment

                • #9
                  My money's on one of the fuel filters or a blocked breather.
                  Do you know that, with a 50 character limit, it's

                  Comment

                  • #10
                    plug

                    try changing the plug to one that runs a higher temp. and as its ticking over spray some carb cleaner or similar on the inlet rubber. if it floods or revs higher then u r drawing air.

                    Comment

                    • #11
                      Originally posted by Albannach View Post
                      My money's on one of the fuel filters or a blocked breather.

                      Five quid it's the CDI unit then.

                      Comment

                      • #12
                        Originally posted by BUSHWHACKER View Post
                        Five quid it's the CDI unit then.
                        OK
                        Do you know that, with a 50 character limit, it's

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                        • #13
                          Whatevers wrong with it I can't see any point in revving a 125 4 stroke past 10,000 revs...
                          it's in me shed, mate.

                          Comment

                          • #14
                            how many bikers on here?
                            Surf.gone but not forgottendisco now gone aswell

                            Comment

                            • #15
                              2 things i would check,the carb itself,maybe a hole in the floats or blocked needle,or pipe that carb goes onto may be split

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