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DT125R FORUM

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  4. Twin radiator

Twin radiator

Scheduled Pinned Locked Moved DTR
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  • R ryanjimccfc

    @Calum mine is also getting hot it's Athena 170 tm35 blaster 200 vforce reeds and few more bits need to keep them temps down wich I'm struggling to do I've got waterless coolent ready to go but I want to add another radiator and see how that helps I run a cooling fan to and still gets to like 98

    CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #8

    @ryanjimccfc Waterless coolant will result in it runner hotter.

    Always Originate, Never Pirate!

    R 1 Reply Last reply
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    • CalumC Calum

      @ryanjimccfc Waterless coolant will result in it runner hotter.

      R Offline
      R Offline
      ryanjimccfc
      wrote on last edited by
      #9

      @Calum okay then I won't bother with that what second radiator can I use

      CalumC 1 Reply Last reply
      0
      • R ryanjimccfc

        @Calum okay then I won't bother with that what second radiator can I use

        CalumC Offline
        CalumC Offline
        Calum
        wrote on last edited by
        #10

        @ryanjimccfc You can use whatever radiator you want. Just make up some brackets for it to fit.

        Always Originate, Never Pirate!

        R 1 Reply Last reply
        0
        • CalumC Calum

          @ryanjimccfc You can use whatever radiator you want. Just make up some brackets for it to fit.

          R Offline
          R Offline
          ryanjimccfc
          wrote on last edited by
          #11

          @Calum I do have a set of wr200 radiators from a previous project but there are smaller in size than the dtr is it worth doing both or just simply adding the 1 extra they are shiny alloy so they look a lot nicer

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          • R Offline
            R Offline
            ryanjimccfc
            wrote on last edited by
            #12

            It's a shame I don't have a dt200 one cause that would bolt straight on

            1 Reply Last reply
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            • Glynn123G Offline
              Glynn123G Offline
              Glynn123
              wrote on last edited by
              #13

              In the heights of summer hammering my DT flat out for hours on end through mountain passes etc I seen a maximum of 80 degrees c after sorting my cooling system and head gasket out. Heard the same from others over in Norway and Germany, even with higher tuned DTRs during long burnouts etc. I know when I used to do alot of trail riding in humid woods my DT would sit at around 80 degrees in summer, where my trials bike would occasionally boil. Theres nothing wrong with the standard cooling system, im pretty sure BARacing are still running single rads on their bikes also.

              R 1 Reply Last reply
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              • Glynn123G Glynn123

                In the heights of summer hammering my DT flat out for hours on end through mountain passes etc I seen a maximum of 80 degrees c after sorting my cooling system and head gasket out. Heard the same from others over in Norway and Germany, even with higher tuned DTRs during long burnouts etc. I know when I used to do alot of trail riding in humid woods my DT would sit at around 80 degrees in summer, where my trials bike would occasionally boil. Theres nothing wrong with the standard cooling system, im pretty sure BARacing are still running single rads on their bikes also.

                R Offline
                R Offline
                ryanjimccfc
                wrote on last edited by
                #14

                @Glynn123 that may be the case but mine is not good enough for what I'm doing with it hence the post

                Glynn123G 1 Reply Last reply
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                • R Offline
                  R Offline
                  ryanjimccfc
                  wrote on last edited by
                  #15

                  How do I go about plumbing it all up just y piece it all In?

                  1 Reply Last reply
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                  • R ryanjimccfc

                    @Glynn123 that may be the case but mine is not good enough for what I'm doing with it hence the post

                    Glynn123G Offline
                    Glynn123G Offline
                    Glynn123
                    wrote on last edited by
                    #16

                    @ryanjimccfc just saying you should possibly look elsewhere, sounds as if there's a problem in the cooling system to me 👍

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                    • BluestoesonnoseB Offline
                      BluestoesonnoseB Offline
                      Bluestoesonnose
                      wrote on last edited by
                      #17

                      I'm guessing these overheating bikes a a tip top cooling system, with a rad in A1 condition, pump working as it should be, cooling galleries in the head and barrel free from corrosion and debris, etc, etc? As these bike are sold worldwide with the same cooling system and some areas of Europe have higher temps and higher altitudes than we see.

                      2002 DT125R

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                      • R Offline
                        R Offline
                        ryanjimccfc
                        wrote on last edited by
                        #18

                        I've got A new radiator new pump it's a brand new top end all new cooling hoses good quality Coolent no air locks digital temp gauge so I can see what's going on and the bike is getting to hot it's getting to like 110 115 and personally I think that's way to hot I even have a cooling fan not a pc one a proper radiator fan to help with air flow when I'm off roading and I just carnt seem to get control of the temps which is why I'm wanting to try a twin radiator set up

                        1 Reply Last reply
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                        • BluestoesonnoseB Offline
                          BluestoesonnoseB Offline
                          Bluestoesonnose
                          wrote on last edited by
                          #19

                          Engines running lean run hot, whilst 2 strokes perform better on the edge of seizing is this what you're looking for, or would it be worth trying to richen up the motor a little and see if the temp drops as something doesn't seem right. I've tuned quite a few bike and car engines over the years and only minis and imps had issues that required doubling the size of the rad.

                          2002 DT125R

                          1 Reply Last reply
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                          • R Offline
                            R Offline
                            ryanjimccfc
                            wrote on last edited by
                            #20

                            Okay I'll look into the jetting but bike runs really well with jet it has I'm not saying it the right jet but I thought it would have a white plug if lean

                            1 Reply Last reply
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                            • BluestoesonnoseB Offline
                              BluestoesonnoseB Offline
                              Bluestoesonnose
                              wrote on last edited by
                              #21

                              Hi Ryan,
                              Just checked through some old photos of my RD350LC I had in the 80s with a Stan Stephen's stage 4 barrel porting on it, head lapped to the barrel, microns, KnN pod filters and running on 4 star and it was on a std rad.
                              Thrashed everywhere the temp was in normal limits.

                              2002 DT125R

                              1 Reply Last reply
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                              • BluestoesonnoseB Offline
                                BluestoesonnoseB Offline
                                Bluestoesonnose
                                wrote on last edited by
                                #22

                                Hi Ryan,
                                Something that just entered the old grey matter, is the rad cap the correct one, in good condition and is it rated for UK ambient conditions?

                                If you're not able to get the system at the right pressure the water will overheat and you will have cooling issues. It could be worth splashing out on a new genuine rad cap.

                                Cheers

                                2002 DT125R

                                R 1 Reply Last reply
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                                • BluestoesonnoseB Bluestoesonnose

                                  Hi Ryan,
                                  Something that just entered the old grey matter, is the rad cap the correct one, in good condition and is it rated for UK ambient conditions?

                                  If you're not able to get the system at the right pressure the water will overheat and you will have cooling issues. It could be worth splashing out on a new genuine rad cap.

                                  Cheers

                                  R Offline
                                  R Offline
                                  ryanjimccfc
                                  wrote on last edited by
                                  #23

                                  @Bluestoesonnose It's a genuine cap

                                  BluestoesonnoseB 1 Reply Last reply
                                  0
                                  • R ryanjimccfc

                                    @Bluestoesonnose It's a genuine cap

                                    BluestoesonnoseB Offline
                                    BluestoesonnoseB Offline
                                    Bluestoesonnose
                                    wrote on last edited by
                                    #24

                                    @ryanjimccfc Is it in good condition, could be worth trying another one to ensure you're getting the correct pressure.

                                    2002 DT125R

                                    1 Reply Last reply
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                                    • CalumC Calum

                                      Yes it is possible.

                                      alt text

                                      M Offline
                                      M Offline
                                      mhbikesnbits
                                      wrote on last edited by
                                      #25

                                      @Calum I know this is a old post but what twin radiators are you running here ?

                                      CalumC 1 Reply Last reply
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                                      • M mhbikesnbits

                                        @Calum I know this is a old post but what twin radiators are you running here ?

                                        CalumC Offline
                                        CalumC Offline
                                        Calum
                                        wrote on last edited by
                                        #26

                                        @mhbikesnbits Yamaha DT 230 Lanza radiators.

                                        I've finally got this running perfect now! Dead on 60 degrees under full load. So well happy about that.

                                        Always Originate, Never Pirate!

                                        M 1 Reply Last reply
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                                        • CalumC Calum

                                          @mhbikesnbits Yamaha DT 230 Lanza radiators.

                                          I've finally got this running perfect now! Dead on 60 degrees under full load. So well happy about that.

                                          M Offline
                                          M Offline
                                          mhbikesnbits
                                          wrote on last edited by
                                          #27

                                          @Calum oh really I gotta do myself some twin radiators for my 200 engine were they compatible with the standard dt brackets you can get the Lanza in aluminium too which would be nice to have

                                          CalumC 1 Reply Last reply
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