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DT125R FORUM

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  4. Progressive fork springs?

Progressive fork springs?

Scheduled Pinned Locked Moved Suspension
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  • S SpookDog

    @Calum

    I actually didn’t think to contact them 🥴

    Waiting on a fleabay reply now. I asked about length & width and rating...

    CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #13

    @SpookDog And according to fowlers the springs between the two models are the same.

    https://www.fowlersparts.co.uk/parts/4189524/dt125re-1d02-2005-030-a/front-fork

    https://www.fowlersparts.co.uk/parts/4159458/dt125r-3rme-1999-060-a/front-fork

    SPRING, FRONT FORK
    3BN-23141-01

    Always Originate, Never Pirate!

    markus.wM 1 Reply Last reply
    0
    • HOTSHOT IIIH HOTSHOT III

      @SpookDog According to Haynes:

      3DB1 ('88 round slide carb model) spring free length 478mm, service limit 473mm

      3RN1 ('89 onward) spring free length 503mm, service limit 468mm

      No mention of forks in the separate chapter for the '97 onwards DTR and DTX so I can only assume the springs are identical to 3RN1 (although I'd be interested if this is the case particularly regarding the DTX)

      markus.wM Offline
      markus.wM Offline
      markus.w
      wrote on last edited by
      #14

      @HOTSHOT-III I believe the DTX has shorter stiffer forks.

      1 Reply Last reply
      1
      • CalumC Calum

        @SpookDog And according to fowlers the springs between the two models are the same.

        https://www.fowlersparts.co.uk/parts/4189524/dt125re-1d02-2005-030-a/front-fork

        https://www.fowlersparts.co.uk/parts/4159458/dt125r-3rme-1999-060-a/front-fork

        SPRING, FRONT FORK
        3BN-23141-01

        markus.wM Offline
        markus.wM Offline
        markus.w
        wrote on last edited by
        #15

        @Calum yes they are identical. Just the 1988 early model are different as are the DTX. R and RE are the same.

        1 Reply Last reply
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        • HOTSHOT IIIH HOTSHOT III

          @SpookDog According to Haynes:

          3DB1 ('88 round slide carb model) spring free length 478mm, service limit 473mm

          3RN1 ('89 onward) spring free length 503mm, service limit 468mm

          No mention of forks in the separate chapter for the '97 onwards DTR and DTX so I can only assume the springs are identical to 3RN1 (although I'd be interested if this is the case particularly regarding the DTX)

          S Offline
          S Offline
          SpookDog
          wrote on last edited by SpookDog
          #16

          @HOTSHOT-III
          That’s a typo for the 503mm spring wear limit, it’s supposed to be 499mm. Hell of a wear limit otherwise!.
          I read somewhere that dtx springs are 515mm and progressive as standard. Probably the same as TZR springs if the info was right...

          Got a reply from fleabay: not in UK stock, 40-45 day order wait. Springs are 515mm x 3.9mm and are rated for 65-110kg weight riders...

          Sounds perfect, just have to trim the spring spacers by 12mm. Shame about the wait!...

          S 1 Reply Last reply
          2
          • S SpookDog

            @HOTSHOT-III
            That’s a typo for the 503mm spring wear limit, it’s supposed to be 499mm. Hell of a wear limit otherwise!.
            I read somewhere that dtx springs are 515mm and progressive as standard. Probably the same as TZR springs if the info was right...

            Got a reply from fleabay: not in UK stock, 40-45 day order wait. Springs are 515mm x 3.9mm and are rated for 65-110kg weight riders...

            Sounds perfect, just have to trim the spring spacers by 12mm. Shame about the wait!...

            S Offline
            S Offline
            SpookDog
            wrote on last edited by SpookDog
            #17

            Cheers for the info guys, it all helps!...

            Ordered some springs, just in it for the long wait now 🙄

            If anyone has any fork bottoms, or whole forks, please let me know. I don’t have time to powder coat mine when I rebuild them...

            MadGyverM 1 Reply Last reply
            0
            • S SpookDog

              Cheers for the info guys, it all helps!...

              Ordered some springs, just in it for the long wait now 🙄

              If anyone has any fork bottoms, or whole forks, please let me know. I don’t have time to powder coat mine when I rebuild them...

              MadGyverM Online
              MadGyverM Online
              MadGyver
              wrote on last edited by
              #18

              @SpookDog
              DT200R springs are 548mm.Have them in mine with the air adjust cap's.

              I need my tools and a pile of junk.....

              S 1 Reply Last reply
              0
              • MadGyverM MadGyver

                @SpookDog
                DT200R springs are 548mm.Have them in mine with the air adjust cap's.

                S Offline
                S Offline
                SpookDog
                wrote on last edited by SpookDog
                #19

                @MadGyver

                What bike do you have them fitted in?...

                PS thank you for the info!...

                MadGyverM 1 Reply Last reply
                0
                • S SpookDog

                  @MadGyver

                  What bike do you have them fitted in?...

                  PS thank you for the info!...

                  MadGyverM Online
                  MadGyverM Online
                  MadGyver
                  wrote on last edited by
                  #20

                  @SpookDog In my DT125.

                  I need my tools and a pile of junk.....

                  S 1 Reply Last reply
                  0
                  • MadGyverM MadGyver

                    @SpookDog In my DT125.

                    S Offline
                    S Offline
                    SpookDog
                    wrote on last edited by
                    #21

                    @MadGyver

                    Did you just delete the spacers completely? Any noticeable improvement? Also are the springs linear or progressive?...
                    Cheers bud!...

                    MadGyverM 1 Reply Last reply
                    0
                    • S SpookDog

                      @MadGyver

                      Did you just delete the spacers completely? Any noticeable improvement? Also are the springs linear or progressive?...
                      Cheers bud!...

                      MadGyverM Online
                      MadGyverM Online
                      MadGyver
                      wrote on last edited by
                      #22

                      @SpookDog said in Progressive fork springs?:

                      @MadGyver

                      Did you just delete the spacers completely? Any noticeable improvement? Also are the springs linear or progressive?...
                      Cheers bud!...

                      Didn't remove anything as memory serves.I had 2 forks,one DT125 and later one DT200,I had purchased every part to rebuild the 125 before having the 200.Compared everything and found to be the same except the springs.So I used the springs and the air adjust caps from the 200 forks.
                      They don't bottom easy as far I tested them and seem better for the SM style than the 125 springs,but soft to go trail ride.

                      I need my tools and a pile of junk.....

                      1 Reply Last reply
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