Skip to content
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
Skins
  • Light
  • Cerulean
  • Cosmo
  • Flatly
  • Journal
  • Litera
  • Lumen
  • Lux
  • Materia
  • Minty
  • Morph
  • Pulse
  • Sandstone
  • Simplex
  • Sketchy
  • Spacelab
  • United
  • Yeti
  • Zephyr
  • Dark
  • Cyborg
  • Darkly
  • Quartz
  • Slate
  • Solar
  • Superhero
  • Vapor

  • Default (Slate)
  • No Skin
Collapse
Brand Logo

DT125R FORUM

  1. Home
  2. Technical Zone
  3. Engine
  4. Dt 125r dyno

Dt 125r dyno

Scheduled Pinned Locked Moved Engine
98 Posts 14 Posters 13.4k Views
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • NottsbikerN Offline
    NottsbikerN Offline
    Nottsbiker
    wrote on last edited by
    #54

    Had this recently with someone telling me my TDR would be dog slow with its DTR cylinder and that his 4FU with 32mm would be a rocket ship. Person seemed unable to comprehend that I didnt really care that much and that its essentially a softly tuned fun / commuter bike that is designed to be reliable and run on basic maintenance only.

    P codes, SP cylinders etc are all good if you have them, can afford them and are that bothered about getting 1 or 2 bhp out of a softly tuned Yamaha engine.

    I've just sold 150bhp Ducati Multistrada so I'm not overly interested in 15 or 20 hp as long as the bike moves and is fun to ride 🙂

    1 Reply Last reply
    2
    • CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #55

      If I wanted to go silly fast I'd take my ZXR out for a spin 🤣

      Always Originate, Never Pirate!

      NottsbikerN 1 Reply Last reply
      1
      • J Offline
        J Offline
        jonne123
        wrote on last edited by
        #56

        Yeah i know that its not a rocket ship. But i hope for little more throttle response and 1-3hp more

        NottsbikerN 1 Reply Last reply
        0
        • S Offline
          S Offline
          SpookDog
          wrote on last edited by
          #57

          @jonne123

          No disrespect meant from the start! But I’m guessing that you’re about 17 and haven’t ridden a great deal of bikes?
          Every 125 Has been restricted to about 12bhp since the late 80’s AFAIK. Any bike that is significantly above that has been de-restricted and/or tuned.
          You can unrestricted early dtr’s by ‘pinning’ the power valve open. This will give you higher bhp but will basically make the throttle an on/off button with terrible response.
          Later bikes I don’t know as much. You can unrestrict them and the variable power valve will still give you better low rev torque/response (I’m guessing that is what you mean by throttle response?)

          Do some reading up on deristricting your year model bike, then do some riding. Stop worrying about numbers bud, enjoy a wicked little bike for what it is, before yearning for more...

          CalumC 1 Reply Last reply
          3
          • J jonne123

            Yeah i know that its not a rocket ship. But i hope for little more throttle response and 1-3hp more

            NottsbikerN Offline
            NottsbikerN Offline
            Nottsbiker
            wrote on last edited by
            #58

            @jonne123 said in Dt 125r dyno:

            Yeah i know that its not a rocket ship. But i hope for little more throttle response and 1-3hp more

            Thats a big increase for a 125

            1 Reply Last reply
            0
            • CalumC Calum

              If I wanted to go silly fast I'd take my ZXR out for a spin 🤣

              NottsbikerN Offline
              NottsbikerN Offline
              Nottsbiker
              wrote on last edited by
              #59

              @Calum said in Dt 125r dyno:

              If I wanted to go silly fast I'd take my ZXR out for a spin 🤣

              Building a 900 Monster this winter for fun at a lower pace 🙂

              1 Reply Last reply
              1
              • S SpookDog

                @jonne123

                No disrespect meant from the start! But I’m guessing that you’re about 17 and haven’t ridden a great deal of bikes?
                Every 125 Has been restricted to about 12bhp since the late 80’s AFAIK. Any bike that is significantly above that has been de-restricted and/or tuned.
                You can unrestricted early dtr’s by ‘pinning’ the power valve open. This will give you higher bhp but will basically make the throttle an on/off button with terrible response.
                Later bikes I don’t know as much. You can unrestrict them and the variable power valve will still give you better low rev torque/response (I’m guessing that is what you mean by throttle response?)

                Do some reading up on deristricting your year model bike, then do some riding. Stop worrying about numbers bud, enjoy a wicked little bike for what it is, before yearning for more...

                CalumC Offline
                CalumC Offline
                Calum
                wrote on last edited by
                #60

                @SpookDog I believe you could also show your License to Yamaha at time of purchase and they'd fit the YPVS for you. Hence why some came with the valves.

                The latter models were restricted in other ways and probably came with the valves fitted for emmissions.

                Always Originate, Never Pirate!

                1 Reply Last reply
                1
                • S Offline
                  S Offline
                  SpookDog
                  wrote on last edited by SpookDog
                  #61

                  I did wonder where all the 3 wire servo’s came from. I heard that a 1000 exup had the same servo. Thought that was a 4stroke though.
                  I love learning new shit!

                  Did you mean the 5 wire were emission related? Dunno, I still think they are for improving bottom rev torque. Interesting though...

                  1 Reply Last reply
                  0
                  • S Offline
                    S Offline
                    SpookDog
                    wrote on last edited by
                    #62

                    Off topic. I saw the most beautiful bike ever. It was a Ducati with a ‘space frame’ of steel with about a 750-1000 v twin engine. 80’s looking. I never got a look at the numbers, never had any decals. Cafe racer, clip on looking dream boat!
                    I’d really love to find out what it was...

                    1 Reply Last reply
                    0
                    • J Offline
                      J Offline
                      jonne123
                      wrote on last edited by jonne123
                      #63

                      But doesnt better spark and better ypvs map help eith power a little?

                      Bikes i tested

                      Suzuki pv 77cc & 100cc

                      Yamaha 125r

                      70cc derbi

                      yamaha wr 125x

                      Honda monkey 125cc & 74cc

                      Few Scooters

                      1 Reply Last reply
                      0
                      • DartyD Offline
                        DartyD Offline
                        Darty
                        wrote on last edited by
                        #64

                        alt text

                        alt text

                        alt text

                        The consensus is a fully de-restricted - Pre 1999 DT125R (Light Generator design) , All the ECU's are unrestricted pre 1999/8 will make around at 18hp stock, only because they rev out to 10,500rpm or so.

                        Keep it real

                        1 Reply Last reply
                        0
                        • J Offline
                          J Offline
                          jonne123
                          wrote on last edited by jonne123
                          #65

                          https://tunisti.kuvat.fi/kuvat/Dyno graphs/Vauhtipaivat 2020 Dyno Results/R11.bmp

                          1 Reply Last reply
                          0
                          • J Offline
                            J Offline
                            jonne123
                            wrote on last edited by jonne123
                            #66

                            How tzr 125 makes 25hp?

                            NottsbikerN 1 Reply Last reply
                            0
                            • J jonne123

                              How tzr 125 makes 25hp?

                              NottsbikerN Offline
                              NottsbikerN Offline
                              Nottsbiker
                              wrote on last edited by
                              #67

                              @jonne123 said in Dt 125r dyno:

                              How tzr 125 makes 25hp?

                              Different dyno's read differently and also manufacturers often claim at the crank not back wheel 😉

                              1 Reply Last reply
                              0
                              • J jonne123

                                So im simple terms its easier to buy another bike.

                                clawsC Offline
                                clawsC Offline
                                claws
                                wrote on last edited by
                                #68

                                @jonne123 kyllä noista detseistä tulee se 25 hepoa täystehosena koneelta. tuo 13 hepoa on kuristuksilla. itellä tuli ehkä joku 27-28 ku oli 170cc, giannelli ja 36 millinen keihini

                                2̶0̶0̶4̶ ̶D̶T̶1̶2̶5̶R̶E̶ ̶w̶i̶t̶h̶ ̶s̶u̶p̶e̶r̶m̶o̶t̶o̶ ̶w̶h̶e̶e̶l̶s̶ ̶a̶n̶d̶ ̶a̶ ̶1̶7̶0̶c̶c̶ ̶a̶t̶h̶e̶n̶a̶ ̶k̶i̶t̶
                                1999 YZ250 with a 1999 DTR VIN

                                1 Reply Last reply
                                0
                                • J Offline
                                  J Offline
                                  jonne123
                                  wrote on last edited by
                                  #69

                                  täytyy käydä toisessa penkissä ja huomaa että ei ollu pakoaukon säädin oikein kun ei penkissä menny edes 10000rpm.

                                  O clawsC 2 Replies Last reply
                                  0
                                  • J jonne123

                                    täytyy käydä toisessa penkissä ja huomaa että ei ollu pakoaukon säädin oikein kun ei penkissä menny edes 10000rpm.

                                    O Offline
                                    O Offline
                                    oldman
                                    wrote on last edited by
                                    #70

                                    @jonne123 absolutely, couldn't agree more!

                                    CalumC 1 Reply Last reply
                                    2
                                    • O oldman

                                      @jonne123 absolutely, couldn't agree more!

                                      CalumC Offline
                                      CalumC Offline
                                      Calum
                                      wrote on last edited by
                                      #71

                                      @oldman Actung! Sprich Englisch!

                                      Always Originate, Never Pirate!

                                      1 Reply Last reply
                                      0
                                      • J Offline
                                        J Offline
                                        jonne123
                                        wrote on last edited by
                                        #72

                                        just Finnish... very easy to understand

                                        1 Reply Last reply
                                        0
                                        • J jonne123

                                          täytyy käydä toisessa penkissä ja huomaa että ei ollu pakoaukon säädin oikein kun ei penkissä menny edes 10000rpm.

                                          clawsC Offline
                                          clawsC Offline
                                          claws
                                          wrote on last edited by
                                          #73

                                          @jonne123 ootko johtokikan teheny?

                                          2̶0̶0̶4̶ ̶D̶T̶1̶2̶5̶R̶E̶ ̶w̶i̶t̶h̶ ̶s̶u̶p̶e̶r̶m̶o̶t̶o̶ ̶w̶h̶e̶e̶l̶s̶ ̶a̶n̶d̶ ̶a̶ ̶1̶7̶0̶c̶c̶ ̶a̶t̶h̶e̶n̶a̶ ̶k̶i̶t̶
                                          1999 YZ250 with a 1999 DTR VIN

                                          J 1 Reply Last reply
                                          0
                                          Reply
                                          • Reply as topic
                                          Log in to reply
                                          • Oldest to Newest
                                          • Newest to Oldest
                                          • Most Votes


                                          • Login

                                          • Don't have an account? Register

                                          • Login or register to search.
                                          • First post
                                            Last post
                                          0
                                          • Recent
                                          • Tags
                                          • Popular
                                          • Users
                                          • Groups