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. Cylinder/exhaust problems

Cylinder/exhaust problems

Scheduled Pinned Locked Moved Engine
cylinder
27 Posts 6 Posters 1.9k 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.
  • CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #3

    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.

    Always Originate, Never Pirate!

    O 1 Reply Last reply
    0
    • 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
      O Offline
      Oisin
      wrote on last edited by
      #4

      @Calum So what would u recommend

      1 Reply Last reply
      0
      • CalumC Offline
        CalumC Offline
        Calum
        wrote on last edited by
        #5

        Helicoil the cylinder.

        Always Originate, Never Pirate!

        O 1 Reply Last reply
        0
        • 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.

          O 1 Reply Last reply
          0
          • 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
            O Offline
            Oisin
            wrote on last edited by
            #7

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

            1 Reply Last reply
            0
            • CalumC Calum

              Helicoil the cylinder.

              O Offline
              O Offline
              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

              1 Reply Last reply
              0
              • 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
                2
                • 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
                  O Offline
                  Oisin
                  wrote on last edited by
                  #10

                  @theportingmaster how much u looking for

                  1 Reply Last reply
                  0
                  • T Offline
                    T Offline
                    theportingmaster
                    wrote on last edited by
                    #11

                    Open to offers, cheers Terry

                    O 2 Replies Last reply
                    0
                    • 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
                      0
                      • 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
                        0
                        • T theportingmaster

                          Open to offers, cheers Terry

                          O Offline
                          O Offline
                          Oisin
                          wrote on last edited by
                          #14

                          @theportingmaster Ok well I could do €125 for it

                          CalumC 1 Reply Last reply
                          0
                          • 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
                            0
                            • T Offline
                              T Offline
                              theportingmaster
                              wrote on last edited by
                              #16

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

                              O 1 Reply Last reply
                              0
                              • T theportingmaster

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

                                O Offline
                                O Offline
                                Oisin
                                wrote on last edited by
                                #17

                                @theportingmaster how much would postage to Ireland be

                                1 Reply Last reply
                                0
                                • T Offline
                                  T Offline
                                  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

                                  O 1 Reply Last reply
                                  0
                                  • 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
                                    0
                                    • 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
                                      O Offline
                                      Oisin
                                      wrote on last edited by
                                      #20

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

                                      1 Reply Last reply
                                      0
                                      • O Offline
                                        O Offline
                                        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
                                        1
                                        • 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

                                          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