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DT125R FORUM

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  4. Rear suspension too hard.

Rear suspension too hard.

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  • 2 Offline
    2 Offline
    2stroketerry
    wrote on last edited by
    #1

    Hi, figured out what is causing my DT to weave at high speeds and the rear suspension is way too hard compared to the front. It is a 2003 DT 125 R, with no one on the bike what is the rear sag roughly for a 2003 dt. On my bike with no one on it and the bike stood level if I pull up on the rear mudguard there is no sag at all not even a mm as when I pull up on the mudguard the bike comes off the floor. Is there any way to adjust the preload on the rear shock, how can I tell if there is a jack up kit
    on it. thanks

    declanD 1 Reply Last reply
    0
    • CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #2

      As far as I'm aware, DT shocks were always piss poor and non-adjustable.

      That said, I've never had any issues with my RE, always felt the shock was adequate enough for road use.

      I don't think they're serviceable either, so it'll have to be a replacement one.

      Happy to be corrected...

      Always Originate, Never Pirate!

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      • J Offline
        J Offline
        Jens Eskildsen
        wrote on last edited by Jens Eskildsen
        #3

        Static sag is 10% of total travel of the rear shock, race sag is 30%.- This is a very good rule of thump for every dirtbike/dualsport/mx bike out there.

        My dtr has spring preload at the bottom. its easier to remove the shock to adjust it, however yours could be damaged, it the preload is wound op a lot!
        http://www.motor-bike-breakers.co.uk/wp-content/uploads/2014/12/Yamaha-DTR-125-Rear-Shock-absorber-Spare-Parts-Motor-Cycle-Breaking.jpg

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        • 2 Offline
          2 Offline
          2stroketerry
          wrote on last edited by
          #4

          Here is my rear suspension, are the dog bones standard as my rear suspension is too high.0_1524857475620_1.jpg
          0_1524857489944_2.jpg

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          • J Offline
            J Offline
            Jens Eskildsen
            wrote on last edited by
            #5

            Theres a lot of preload on that spring, compared to the picture i found. So thats why it stiff, and the rear is higher in the air than it should.

            Its hard to tell if dogbones are stock from a pic, but they look like it.

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            • 2 2stroketerry

              Hi, figured out what is causing my DT to weave at high speeds and the rear suspension is way too hard compared to the front. It is a 2003 DT 125 R, with no one on the bike what is the rear sag roughly for a 2003 dt. On my bike with no one on it and the bike stood level if I pull up on the rear mudguard there is no sag at all not even a mm as when I pull up on the mudguard the bike comes off the floor. Is there any way to adjust the preload on the rear shock, how can I tell if there is a jack up kit
              on it. thanks

              declanD Offline
              declanD Offline
              declan
              wrote on last edited by declan
              #6

              @2stroketerry have you cleaned and greased your dog bone bushings mine were dry and full of dirt so my rear suspension was non existent im talking nothing at all

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              • 2 Offline
                2 Offline
                2stroketerry
                wrote on last edited by
                #7

                Just got the bike recently and working outdoors so haven't had the chance to do many jobs on it yet due to the weather.

                declanD 1 Reply Last reply
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                • 2 2stroketerry

                  Just got the bike recently and working outdoors so haven't had the chance to do many jobs on it yet due to the weather.

                  declanD Offline
                  declanD Offline
                  declan
                  wrote on last edited by
                  #8

                  @2stroketerry well maybe my experience it bet my cat on it being the dog bone semi seized

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