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DT125R FORUM

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  4. Clutchless Gearshifting

Clutchless Gearshifting

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  • DartyD Offline
    DartyD Offline
    Darty
    wrote on last edited by
    #1

    To all the lads out there, damage occurs significantly quicker on any gearbox.

    https://www.youtube.com/watch?v=p09goXGd9Ro

    My DT gearbox is now rough as arse,

    Keep it real

    1 Reply Last reply
    2
    • CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #2

      Hhmm, not really convinced.

      Since the output shaft is connected to the rear wheel and the rear wheel is actually still spinning at some crazy RPM it almost seems a moot point.

      Besides you don't keep the power on with a clutchless shift the idea is you shut the throttle off whilst you shift, ergo no torque to damage the gearbox.

      The same would be said if you used the clutch but kept the throttle wide open. You would damage the gearbox just as much if not more. You wouldn't shift with the clutch in throttle wide open, so why would you shift no clutch throttle wide open...

      Always Originate, Never Pirate!

      DartyD 1 Reply Last reply
      0
      • CalumC Calum

        Hhmm, not really convinced.

        Since the output shaft is connected to the rear wheel and the rear wheel is actually still spinning at some crazy RPM it almost seems a moot point.

        Besides you don't keep the power on with a clutchless shift the idea is you shut the throttle off whilst you shift, ergo no torque to damage the gearbox.

        The same would be said if you used the clutch but kept the throttle wide open. You would damage the gearbox just as much if not more. You wouldn't shift with the clutch in throttle wide open, so why would you shift no clutch throttle wide open...

        DartyD Offline
        DartyD Offline
        Darty
        wrote on last edited by Darty
        #3

        @Calum True, we all know what a clutch-less shift is.

        But the point is, a clutch-less shift is dependent on matching the speed of the next gear and no additional torque from the rear wheel into the output shaft.

        When this happens, the clutch-less shift works the same as just shifting with the clutch.

        The fact is, the clutch is better for consistently doing this going up the box, thus less wear over time,

        Keep it real

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        • A Offline
          A Offline
          andrewj1680
          wrote on last edited by
          #4

          I've never had a problem with it personally

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          0
          • ZrakoZ Offline
            ZrakoZ Offline
            Zrako
            wrote on last edited by
            #5

            I've been told to shift without the clutch on my bikes and Im tried , said no. Didnt liked it and its habit to pull that lever 😃

            1979 Jawa Mustang 50
            2003 Gilera DNA 125 R.I.P
            2015 Keeway TX 125 SM
            2006 Yamaha DT 125 X

            CalumC 1 Reply Last reply
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            • ZrakoZ Zrako

              I've been told to shift without the clutch on my bikes and Im tried , said no. Didnt liked it and its habit to pull that lever 😃

              CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by
              #6

              @Zrako When you haven't got a choice, i.e. clutch cable snap, I'm saying it's going to cause next to zero damage if done right.

              Always Originate, Never Pirate!

              ZrakoZ 1 Reply Last reply
              1
              • CalumC Calum

                @Zrako When you haven't got a choice, i.e. clutch cable snap, I'm saying it's going to cause next to zero damage if done right.

                ZrakoZ Offline
                ZrakoZ Offline
                Zrako
                wrote on last edited by
                #7

                @Calum aye , in emergency cases its something different than regular bipassing the clutch

                1979 Jawa Mustang 50
                2003 Gilera DNA 125 R.I.P
                2015 Keeway TX 125 SM
                2006 Yamaha DT 125 X

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