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DT125R FORUM

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Scheduled Pinned Locked Moved Welcome New Owners!
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  • S Offline
    S Offline
    Scootjockey
    wrote on last edited by
    #1

    Hi Folks,
    Thought I’d introduce myself to the forum. Slowly getting around the site. Starting to realise theres quite a bit of knowledge out there and before I decided to buy strip and rebuild “For the Bairn to pass his test on” French import DT I should have looked on here 1st.
    But it gave me something to do over the winter and now I’m just waiting for UK plate to come back from her majesty’s finest admin dept to get him out on the road.
    In between then I bought myself a 1984 DT200R. Apparently it’s a Japan only spec bike with Kmh clocks and only exported to Aus NZ and Canada. But found it’s way to the UK.
    A good old stroker to revitalise my youth and something I can go out on with my son until he gets bored finds his feet and his own scratching roads and trails. Now this is where my problem lies the DT200 is running 13/49 on 520 chain and far too under geared for the road. Hitting the red line in every gear, wheelies for fun in 1st and 2nd off the throttle. Fine for the 18 year old outside the school gates, but a pain in the arse for the mature 50 something who doesn’t want to attract the attention. Can anyone recommend/ supply the correct gearing in the UK ? I’ve seen loads of variations for the 428 but very little in the way of sprockets for the 520.
    Thanks Scootjockey

    markus.wM 2 Replies Last reply
    2
    • S Scootjockey

      Hi Folks,
      Thought I’d introduce myself to the forum. Slowly getting around the site. Starting to realise theres quite a bit of knowledge out there and before I decided to buy strip and rebuild “For the Bairn to pass his test on” French import DT I should have looked on here 1st.
      But it gave me something to do over the winter and now I’m just waiting for UK plate to come back from her majesty’s finest admin dept to get him out on the road.
      In between then I bought myself a 1984 DT200R. Apparently it’s a Japan only spec bike with Kmh clocks and only exported to Aus NZ and Canada. But found it’s way to the UK.
      A good old stroker to revitalise my youth and something I can go out on with my son until he gets bored finds his feet and his own scratching roads and trails. Now this is where my problem lies the DT200 is running 13/49 on 520 chain and far too under geared for the road. Hitting the red line in every gear, wheelies for fun in 1st and 2nd off the throttle. Fine for the 18 year old outside the school gates, but a pain in the arse for the mature 50 something who doesn’t want to attract the attention. Can anyone recommend/ supply the correct gearing in the UK ? I’ve seen loads of variations for the 428 but very little in the way of sprockets for the 520.
      Thanks Scootjockey

      markus.wM Offline
      markus.wM Offline
      markus.w
      wrote on last edited by markus.w
      #2

      @Scootjockey that's extremely low geared, front is way too small and rear is way too big. Should be 16/43. There's a set on eBay from an Australian seller which I'll link for you. They're hard to find in UK as they were never sold here officially. Maybe try fowler's Yamaha of Bristol.
      https://www.ebay.co.uk/itm/272601326406?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=pQu6pH5bQuC&sssrc=2349624&ssuid=7ztfcrwyt6w&var=&widget_ver=artemis&media=COPY

      1 Reply Last reply
      0
      • S Scootjockey

        Hi Folks,
        Thought I’d introduce myself to the forum. Slowly getting around the site. Starting to realise theres quite a bit of knowledge out there and before I decided to buy strip and rebuild “For the Bairn to pass his test on” French import DT I should have looked on here 1st.
        But it gave me something to do over the winter and now I’m just waiting for UK plate to come back from her majesty’s finest admin dept to get him out on the road.
        In between then I bought myself a 1984 DT200R. Apparently it’s a Japan only spec bike with Kmh clocks and only exported to Aus NZ and Canada. But found it’s way to the UK.
        A good old stroker to revitalise my youth and something I can go out on with my son until he gets bored finds his feet and his own scratching roads and trails. Now this is where my problem lies the DT200 is running 13/49 on 520 chain and far too under geared for the road. Hitting the red line in every gear, wheelies for fun in 1st and 2nd off the throttle. Fine for the 18 year old outside the school gates, but a pain in the arse for the mature 50 something who doesn’t want to attract the attention. Can anyone recommend/ supply the correct gearing in the UK ? I’ve seen loads of variations for the 428 but very little in the way of sprockets for the 520.
        Thanks Scootjockey

        markus.wM Offline
        markus.wM Offline
        markus.w
        wrote on last edited by markus.w
        #3

        @Scootjockey yambits have the standard 43 rear for £17.99. Check them out they may have the front too.
        EDIT. Something else just dawned on me, maybe why you're having trouble finding parts. If it's 1984 then it's a dt200lc not dt200r. The 200r was made from 1989 on.

        S R 2 Replies Last reply
        0
        • markus.wM markus.w

          @Scootjockey yambits have the standard 43 rear for £17.99. Check them out they may have the front too.
          EDIT. Something else just dawned on me, maybe why you're having trouble finding parts. If it's 1984 then it's a dt200lc not dt200r. The 200r was made from 1989 on.

          S Offline
          S Offline
          Scootjockey
          wrote on last edited by
          #4

          @markus-w

          Hi Markus I thanks for the info, you may be right with the LC and not an R as I am struggling for bits when I search with the year. I’ll check with Yambits as I’ve tried Fowlers, the chassis and engine is a 37F ****.

          CalumC markus.wM 2 Replies Last reply
          1
          • S Scootjockey

            @markus-w

            Hi Markus I thanks for the info, you may be right with the LC and not an R as I am struggling for bits when I search with the year. I’ll check with Yambits as I’ve tried Fowlers, the chassis and engine is a 37F ****.

            CalumC Offline
            CalumC Offline
            Calum
            wrote on last edited by
            #5

            @Scootjockey hello and welcome!

            Sounds like a machine, not familiar with that variant of bike myself, but hopefully someone can help you along your way!

            Always Originate, Never Pirate!

            1 Reply Last reply
            0
            • S Scootjockey

              @markus-w

              Hi Markus I thanks for the info, you may be right with the LC and not an R as I am struggling for bits when I search with the year. I’ll check with Yambits as I’ve tried Fowlers, the chassis and engine is a 37F ****.

              markus.wM Offline
              markus.wM Offline
              markus.w
              wrote on last edited by
              #6

              @Scootjockey 37f is dt200lc. Here's another good Yamaha parts supplier.
              https://www.bike-parts-yam.com/

              MadGyverM 1 Reply Last reply
              1
              • markus.wM markus.w

                @Scootjockey 37f is dt200lc. Here's another good Yamaha parts supplier.
                https://www.bike-parts-yam.com/

                MadGyverM Offline
                MadGyverM Offline
                MadGyver
                wrote on last edited by
                #7

                Has same engine parts with it's brother Yamaha Blaster 200,same engine without Pv if I remember correctly.If you look to USA side you will find parts.Also 37F was sold in Greece.

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

                1 Reply Last reply
                0
                • markus.wM markus.w

                  @Scootjockey yambits have the standard 43 rear for £17.99. Check them out they may have the front too.
                  EDIT. Something else just dawned on me, maybe why you're having trouble finding parts. If it's 1984 then it's a dt200lc not dt200r. The 200r was made from 1989 on.

                  R Offline
                  R Offline
                  rraleks
                  wrote on last edited by
                  #8

                  @markus-w The KTM lc2 use a 520 chain on the water-cooled dtr 125 engine. Maybe you can fit a bigger front sprocket from this bike.

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