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DT125R FORUM

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Scheduled Pinned Locked Moved Welcome New Owners!
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  • K kevb1967

    XIYL7888.JPG new one having a few problems does 65-70 mph in 5th but when you go to 6th nothing happens also only restarts when hot on full throttle mods new front pipe .read switch removed from housing,6in away from Speedo, read block rubber reshaped carb ,restored std has main jet 240, model 3RML-010 Portuguese ? CDI 3RM-30 any suggestions

    Louis-DT-WRL Offline
    Louis-DT-WRL Offline
    Louis-DT-WR
    wrote on last edited by
    #6

    @kevb1967 not enough power to pull the gear. Probably need a smaller front sprocket

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    • K Offline
      K Offline
      kevb1967
      wrote on last edited by
      #7

      thanks I will check the number of teeth on the front sprocket do you know what is std

      1 Reply Last reply
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      • K kevb1967

        XIYL7888.JPG new one having a few problems does 65-70 mph in 5th but when you go to 6th nothing happens also only restarts when hot on full throttle mods new front pipe .read switch removed from housing,6in away from Speedo, read block rubber reshaped carb ,restored std has main jet 240, model 3RML-010 Portuguese ? CDI 3RM-30 any suggestions

        markus.wM Offline
        markus.wM Offline
        markus.w
        wrote on last edited by
        #8

        @kevb1967 welcome, very nice looking DT you have. My French import has the 3rm-30 CDI and I understand that they're one of the best.

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        • K Offline
          K Offline
          kevb1967
          wrote on last edited by
          #9

          thanks how high does yours rev to

          markus.wM 1 Reply Last reply
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          • K kevb1967

            thanks how high does yours rev to

            markus.wM Offline
            markus.wM Offline
            markus.w
            wrote on last edited by
            #10

            @kevb1967 mine has no clocks and it has the 170 kit but it does have very good top end and revs freely. Also the powervalve is pinned open so after about 6k it sort of comes alive. Is your powervalve working ok?

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            • CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by
              #11

              Unfortunately, the 2002 models were heavily restricted. Even with the derestrictions you can still expect problems.

              Get yourself an aftermarket CDI and all those problems will go away and it'll fly through the gears.

              Looks tidy though!

              Always Originate, Never Pirate!

              K 1 Reply Last reply
              0
              • CalumC Calum

                Unfortunately, the 2002 models were heavily restricted. Even with the derestrictions you can still expect problems.

                Get yourself an aftermarket CDI and all those problems will go away and it'll fly through the gears.

                Looks tidy though!

                K Offline
                K Offline
                kevb1967
                wrote on last edited by
                #12

                @Calum thanks any links to them

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

                  https://www.zeeltronic.com/page/yamaha.php

                  Always Originate, Never Pirate!

                  K 1 Reply Last reply
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                  • CalumC Calum

                    https://www.zeeltronic.com/page/yamaha.php

                    K Offline
                    K Offline
                    kevb1967
                    wrote on last edited by
                    #14

                    @Calum is a 3rm-20 CDI any good as i see they are not restricted

                    markus.wM 1 Reply Last reply
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                    • K kevb1967

                      @Calum is a 3rm-20 CDI any good as i see they are not restricted

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

                      @kevb1967 no it's not restricted but if you have the 3rm-30 that is the best one, only available on the French models from 1999-2002 and apparently quite special and rare. Here's a link to a German website which explains the different CDI's. http://dtpedia.de/mediawiki/index.php/CDI_Steuerteile
                      I don't think your problem is a restriction problem, only starting on full throttle from hot? Maybe fuelling or maybe compression? Sounds like your bike is a full power unrestricted french import.

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                      • K Offline
                        K Offline
                        kevb1967
                        wrote on last edited by
                        #16

                        hi thanks mine seams to be portages' but registered as new 2002 in the uk ,its a 3rml-010 and 4bl engine stamp, 3rm-30 cdi ,goes like a rocket to 70mph in 5th, but wont pull hard and or enter the power band in 6th gear and only revs to 9000 but not in 6th ,16/57 gearing refurbished carb std 140 main jet, read switch removed away from Speedo, snorkel removed from air box, read block rubber reshaped big one exhaust any ideas anyone .so near but so far some one musts know ?

                        CalumC 1 Reply Last reply
                        0
                        • K kevb1967

                          hi thanks mine seams to be portages' but registered as new 2002 in the uk ,its a 3rml-010 and 4bl engine stamp, 3rm-30 cdi ,goes like a rocket to 70mph in 5th, but wont pull hard and or enter the power band in 6th gear and only revs to 9000 but not in 6th ,16/57 gearing refurbished carb std 140 main jet, read switch removed away from Speedo, snorkel removed from air box, read block rubber reshaped big one exhaust any ideas anyone .so near but so far some one musts know ?

                          CalumC Offline
                          CalumC Offline
                          Calum
                          wrote on last edited by
                          #17

                          @kevb1967 I mean, it's a 125.doing 70 like that. Could just be gearing.

                          Always Originate, Never Pirate!

                          K 1 Reply Last reply
                          0
                          • K Offline
                            K Offline
                            kevb1967
                            wrote on last edited by
                            #18

                            16/57 gearing is this std ? should it rev over 9000 revs

                            1 Reply Last reply
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                            • CalumC Offline
                              CalumC Offline
                              Calum
                              wrote on last edited by
                              #19

                              The 2000-2004 era were notoriously restricted.

                              Also appreciate that a lot of these bikes were ridden by youngsters weighing 60-70kgs.

                              Always Originate, Never Pirate!

                              1 Reply Last reply
                              0
                              • K Offline
                                K Offline
                                kevb1967
                                wrote on last edited by
                                #20

                                r u saying i need to loose weight , am at 12 st 12lb so down hill it would be faster ?

                                CalumC 1 Reply Last reply
                                0
                                • K kevb1967

                                  r u saying i need to loose weight , am at 12 st 12lb so down hill it would be faster ?

                                  CalumC Offline
                                  CalumC Offline
                                  Calum
                                  wrote on last edited by
                                  #21

                                  @kevb1967 That's not a bad weight, I think I used to be super light, and I swear I got 85mph out of my DTR when I was 17.

                                  Years later, £££ spent on tuning, I'm lucky if I can get 70 out of it. Yeah, I put on weight. My RS on the other hand flies!

                                  Always Originate, Never Pirate!

                                  declanD 1 Reply Last reply
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                                  • CalumC Calum

                                    @kevb1967 That's not a bad weight, I think I used to be super light, and I swear I got 85mph out of my DTR when I was 17.

                                    Years later, £££ spent on tuning, I'm lucky if I can get 70 out of it. Yeah, I put on weight. My RS on the other hand flies!

                                    declanD Offline
                                    declanD Offline
                                    declan
                                    wrote on last edited by
                                    #22

                                    @Calum losing weight is the biggest upgrade for performance

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                                    • K Offline
                                      K Offline
                                      kevb1967
                                      wrote on last edited by
                                      #23

                                      just realized I have a English speedo but it measures distance in km does any one know how to correct this please .

                                      markus.wM 1 Reply Last reply
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                                      • K kevb1967

                                        just realized I have a English speedo but it measures distance in km does any one know how to correct this please .

                                        markus.wM Offline
                                        markus.wM Offline
                                        markus.w
                                        wrote on last edited by
                                        #24

                                        @kevb1967 it sounds like someone has fitted a Speedo drive adapter to it to convert from mph to kmh, it fits to the back of the clocks to change the gearing then the cable fits into it. Or maybe on the wheel end but mine was on the clocks. I bought one a few years ago for my nc30 jap import to convert kmh to mph and was quite an expensive bit of kit, cost me around £100 so if that is the case you could probably sell it if you can put it on eBay France or anywhere in Europe.

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                                        • CalumC Calum

                                          @kevb1967 I mean, it's a 125.doing 70 like that. Could just be gearing.

                                          K Offline
                                          K Offline
                                          kevb1967
                                          wrote on last edited by
                                          #25

                                          @Calum hi all i changed the front to a 15 now and its fine now does 68 in 5th and should rev out in 6th should do about 80 but haven't had a open road with out traffic, very strange to lower the std gearing would this been part of the restriction ?

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