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DT125R FORUM

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  3. Engine
  4. Cylinder/exhaust problems

Cylinder/exhaust problems

Scheduled Pinned Locked Moved Engine
cylinder
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  • CalumC Calum

    It's not compression - See wikipedia

    alt text

    Love this GIF. explains it perfectly.

    Any exhaust pressure lost through the manifold will result in a dramatic loss in power.

    O Offline
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    Oisin
    wrote on last edited by
    #4

    @Calum So what would u recommend

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

      Helicoil the cylinder.

      Always Originate, Never Pirate!

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      • T Offline
        T Offline
        theportingmaster
        wrote on last edited by
        #6

        I have a mint condition cylinder from a 2003 that has been rebored and honed by Mick Abbey and with a new Mitaka Piston Kit, will post some photos if your interested. Has a full gasket kit with it.

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        • T theportingmaster

          I have a mint condition cylinder from a 2003 that has been rebored and honed by Mick Abbey and with a new Mitaka Piston Kit, will post some photos if your interested. Has a full gasket kit with it.

          O Offline
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          Oisin
          wrote on last edited by
          #7

          @theportingmaster Yes please do. What was rebored to or is it still 125cc?
          Thanks very much

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          • CalumC Calum

            Helicoil the cylinder.

            O Offline
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            Oisin
            wrote on last edited by
            #8

            @Calum Ok if u believe that's the best way to go then I'll definitely look into it.

            Thanks a lot Calum

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            • T Offline
              T Offline
              theportingmaster
              wrote on last edited by
              #9

              Hi, was bored and honed by Mick Abbey to 137cc but still has rebores left.1.jpg
              2.jpg
              3.jpg
              4.jpg
              5.jpg
              6.jpg
              7.jpg
              8.jpg
              9.jpg
              10.jpg

              O Stevie WonderS 2 Replies Last reply
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              • T theportingmaster

                Hi, was bored and honed by Mick Abbey to 137cc but still has rebores left.1.jpg
                2.jpg
                3.jpg
                4.jpg
                5.jpg
                6.jpg
                7.jpg
                8.jpg
                9.jpg
                10.jpg

                O Offline
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                Oisin
                wrote on last edited by
                #10

                @theportingmaster how much u looking for

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                • T Offline
                  T Offline
                  theportingmaster
                  wrote on last edited by
                  #11

                  Open to offers, cheers Terry

                  O 2 Replies Last reply
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                  • T theportingmaster

                    Open to offers, cheers Terry

                    O Offline
                    O Offline
                    Oisin
                    wrote on last edited by
                    #12

                    @theportingmaster would u do €85 for the lot

                    CalumC 1 Reply Last reply
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                    • O Oisin

                      @theportingmaster would u do €85 for the lot

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

                      @Oisin I mean, Mick Abbey charges like £150 for the porting working alone...so that would be like bargain of the century 🤣

                      Always Originate, Never Pirate!

                      declanD 1 Reply Last reply
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                      • T theportingmaster

                        Open to offers, cheers Terry

                        O Offline
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                        Oisin
                        wrote on last edited by
                        #14

                        @theportingmaster Ok well I could do €125 for it

                        CalumC 1 Reply Last reply
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                        • O Oisin

                          @theportingmaster Ok well I could do €125 for it

                          CalumC Offline
                          CalumC Offline
                          Calum
                          wrote on last edited by
                          #15

                          @Oisin Well, you ought to see what he comes back with first 🤣

                          Always Originate, Never Pirate!

                          1 Reply Last reply
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                          • T Offline
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                            theportingmaster
                            wrote on last edited by
                            #16

                            @Oisin cost me more than £125 so looking for £175 & postage.

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                            • T theportingmaster

                              @Oisin cost me more than £125 so looking for £175 & postage.

                              O Offline
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                              Oisin
                              wrote on last edited by
                              #17

                              @theportingmaster how much would postage to Ireland be

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                              • T Offline
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                                theportingmaster
                                wrote on last edited by
                                #18

                                Hi, if you send me your postcode can get you a price for tracked delivery, think the price is about the same as posting in the uk. cheers Terry

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                                • CalumC Calum

                                  @Oisin I mean, Mick Abbey charges like £150 for the porting working alone...so that would be like bargain of the century 🤣

                                  declanD Offline
                                  declanD Offline
                                  declan
                                  wrote on last edited by
                                  #19

                                  @Calum id take it for that price any day lol

                                  1 Reply Last reply
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                                  • T theportingmaster

                                    Hi, if you send me your postcode can get you a price for tracked delivery, think the price is about the same as posting in the uk. cheers Terry

                                    O Offline
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                                    Oisin
                                    wrote on last edited by
                                    #20

                                    @theportingmaster I might be able to get my cylinder welded. Can I get back to u

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                                    • O Offline
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                                      Oisin
                                      wrote on last edited by
                                      #21

                                      Just said I'd let u all know I got it fixed.
                                      I used some jb weld and retapped it back our to m8 and seems to be holding now.
                                      Thank you all for your help Oisin.

                                      declanD 1 Reply Last reply
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                                      • O Oisin

                                        Just said I'd let u all know I got it fixed.
                                        I used some jb weld and retapped it back our to m8 and seems to be holding now.
                                        Thank you all for your help Oisin.

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

                                        @Oisin wouldn’t have thought that would hold doubt it will hold forever thoigh

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                                        • CalumC Offline
                                          CalumC Offline
                                          Calum
                                          wrote on last edited by
                                          #23

                                          JB Weld is pretty good stuff. If it's marine grade, I don't any particular reason as to why it wouldn't hold up.

                                          Always Originate, Never Pirate!

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