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DT125R FORUM

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  4. Break in new cylinder

Break in new cylinder

Scheduled Pinned Locked Moved Engine
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  • Irongamer727I Irongamer727

    @declan haha was that during your break in?

    declanD Offline
    declanD Offline
    declan
    wrote on last edited by
    #23

    @irongamer727 I never recorded hours or miles so yeah and also after break in @Calum made me stop lol

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    • Irongamer727I Offline
      Irongamer727I Offline
      Irongamer727
      wrote on last edited by
      #24

      O my god what a relief! Athena is up and running! Jesus Christ I have never ever been so afraid of something going wrong. Hopefully the worst part is over. Still afraid a circlip will come loose and mess EVERYTHING up. But, I've done my best, bring on the summer😁

      CalumC 1 Reply Last reply
      2
      • Irongamer727I Irongamer727

        O my god what a relief! Athena is up and running! Jesus Christ I have never ever been so afraid of something going wrong. Hopefully the worst part is over. Still afraid a circlip will come loose and mess EVERYTHING up. But, I've done my best, bring on the summer😁

        CalumC Offline
        CalumC Offline
        Calum
        wrote on last edited by
        #25

        @irongamer727 nice one bud.

        Always Originate, Never Pirate!

        1 Reply Last reply
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        • J Offline
          J Offline
          Jens Eskildsen
          wrote on last edited by
          #26

          Hopefully you will keep us updated with how you like it, as you clock some miles on her 🙂

          Irongamer727I 1 Reply Last reply
          0
          • J Jens Eskildsen

            Hopefully you will keep us updated with how you like it, as you clock some miles on her 🙂

            Irongamer727I Offline
            Irongamer727I Offline
            Irongamer727
            wrote on last edited by
            #27

            @jens-eskildsen sure will

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            • Irongamer727I Offline
              Irongamer727I Offline
              Irongamer727
              wrote on last edited by
              #28

              I'm getting more acquainted with the brake in procedures. I've always thought you couldn't be too careful running an engine in. Obviously I was wrong. The fact that idling can glaze the bore scares me! I mean you need a good 20 minutes to bled the cooling system of air.
              Guess a moderate run in with a bit of variation of revs is preferable.

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              • CalumC Offline
                CalumC Offline
                Calum
                wrote on last edited by
                #29

                I always thought it was giving it too much chst before thr rings have bedded in causes glazing.

                Either way, get it runing and put some miles intonit before hammeringnit. That's my advice. Two strokes don't last forever so it's a moot point if it lasts +-1k miles. The main thing is getting that fueling spot on.

                Always Originate, Never Pirate!

                declanD 1 Reply Last reply
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                • CalumC Calum

                  I always thought it was giving it too much chst before thr rings have bedded in causes glazing.

                  Either way, get it runing and put some miles intonit before hammeringnit. That's my advice. Two strokes don't last forever so it's a moot point if it lasts +-1k miles. The main thing is getting that fueling spot on.

                  declanD Offline
                  declanD Offline
                  declan
                  wrote on last edited by
                  #30

                  @calum 20 minutes to bleed the cooling it only took mine a few seconds

                  Irongamer727I 1 Reply Last reply
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                  • O Offline
                    O Offline
                    oldman
                    wrote on last edited by
                    #31

                    You should warm the engine thoroughly to make sure thermostat opens and gives full flow to water passages, otherwise pockets of air could remain

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                    • declanD declan

                      @calum 20 minutes to bleed the cooling it only took mine a few seconds

                      Irongamer727I Offline
                      Irongamer727I Offline
                      Irongamer727
                      wrote on last edited by
                      #32

                      @declan after 20 minutes there were still air left. But at that point I felt satisfied.

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                      • CalumC Offline
                        CalumC Offline
                        Calum
                        wrote on last edited by
                        #33

                        I don't think I've really actively bled the coolant system on any of my builds. Fire her up rad cap off, just top it up. Quick blip round the block top her up jobs a goodun

                        Always Originate, Never Pirate!

                        Irongamer727I declanD 3 Replies Last reply
                        0
                        • CalumC Calum

                          I don't think I've really actively bled the coolant system on any of my builds. Fire her up rad cap off, just top it up. Quick blip round the block top her up jobs a goodun

                          Irongamer727I Offline
                          Irongamer727I Offline
                          Irongamer727
                          wrote on last edited by
                          #34

                          @calum works for some

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                          • CalumC Calum

                            I don't think I've really actively bled the coolant system on any of my builds. Fire her up rad cap off, just top it up. Quick blip round the block top her up jobs a goodun

                            declanD Offline
                            declanD Offline
                            declan
                            wrote on last edited by
                            #35

                            @calum well I took my cap off started the bike and after a little bit the coolant expanded and started overflowing so it only took me a few seconds maybe 30s tops

                            Irongamer727I 1 Reply Last reply
                            0
                            • declanD declan

                              @calum well I took my cap off started the bike and after a little bit the coolant expanded and started overflowing so it only took me a few seconds maybe 30s tops

                              Irongamer727I Offline
                              Irongamer727I Offline
                              Irongamer727
                              wrote on last edited by
                              #36

                              @declan ideally you want to warm it up to operating temperature with cap off. That way you know there won't be excessive amounts of air once you're out riding. My radiator started pissing out coolant through the overflow hose due to improper bleeding.

                              declanD 1 Reply Last reply
                              0
                              • Irongamer727I Irongamer727

                                @declan ideally you want to warm it up to operating temperature with cap off. That way you know there won't be excessive amounts of air once you're out riding. My radiator started pissing out coolant through the overflow hose due to improper bleeding.

                                declanD Offline
                                declanD Offline
                                declan
                                wrote on last edited by
                                #37

                                @irongamer727 so I just let it spill out?im pretty sure I managed to get all the air out of mine

                                Irongamer727I 1 Reply Last reply
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                                • declanD declan

                                  @irongamer727 so I just let it spill out?im pretty sure I managed to get all the air out of mine

                                  Irongamer727I Offline
                                  Irongamer727I Offline
                                  Irongamer727
                                  wrote on last edited by
                                  #38

                                  @declan lucky you! I'm only telling you what I experienced with my bike. 😉

                                  1 Reply Last reply
                                  1
                                  • CalumC Calum

                                    I don't think I've really actively bled the coolant system on any of my builds. Fire her up rad cap off, just top it up. Quick blip round the block top her up jobs a goodun

                                    Irongamer727I Offline
                                    Irongamer727I Offline
                                    Irongamer727
                                    wrote on last edited by
                                    #39

                                    @calum you think it's possible to glaze the bore of a plated cylinder? (Nikasil)

                                    CalumC 1 Reply Last reply
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                                    • Irongamer727I Irongamer727

                                      @calum you think it's possible to glaze the bore of a plated cylinder? (Nikasil)

                                      CalumC Offline
                                      CalumC Offline
                                      Calum
                                      wrote on last edited by
                                      #40

                                      @irongamer727 Yes

                                      Always Originate, Never Pirate!

                                      Irongamer727I 1 Reply Last reply
                                      0
                                      • CalumC Calum

                                        @irongamer727 Yes

                                        Irongamer727I Offline
                                        Irongamer727I Offline
                                        Irongamer727
                                        wrote on last edited by
                                        #41

                                        @calum got dammit. I just want to start the bike, listen to it, set the idle and bleed the coolant. I have had it running for roughly 20 minutes on idle before so now I'm thinking of waiting until the snow disappears and then start braking it in.

                                        CalumC 1 Reply Last reply
                                        0
                                        • Irongamer727I Irongamer727

                                          @calum got dammit. I just want to start the bike, listen to it, set the idle and bleed the coolant. I have had it running for roughly 20 minutes on idle before so now I'm thinking of waiting until the snow disappears and then start braking it in.

                                          CalumC Offline
                                          CalumC Offline
                                          Calum
                                          wrote on last edited by
                                          #42

                                          @irongamer727 Don't worry so much about it. Just go out and ride it. It's not going to cause it any harm.

                                          Glazing the bore is going to happen if you literally build a fresh engine, then take the engine to the max non stop for the next thousand miles. You're talking about shortening the life of a two stroke whose top end should be rebuilt every 10k anyhow. So it really makes no odds. Stop worry about it so much.

                                          Always Originate, Never Pirate!

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