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. Engine bogs at 8k rpm... every gear

Engine bogs at 8k rpm... every gear

Scheduled Pinned Locked Moved Engine
18 Posts 4 Posters 1.1k 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.
  • VcelickaV Vcelicka

    @HOTSHOT-III That is a lot of steps dont you know any ytb tutorial..... your saying i should buy whole new lead and cap for spaark plug?

    HOTSHOT IIIH Offline
    HOTSHOT IIIH Offline
    HOTSHOT III
    wrote on last edited by HOTSHOT III
    #9

    @Vcelicka This guy has had a go but he's just joining the new lead to a short stub of the old one which might not cure the problem.

    https://www.youtube.com/watch?v=jz3pklBtK9o&t=129s

    When the coils are manufactured the lead is just a push fit onto a little spike which is the coil output and corrosion can affect the connection here as well as the lead breaking down, hence why soldering makes such a good job of it and sometimes delivers a noticeable performance improvement (the spike sometimes breaks off when removing the old lead but don't worry, just gently clean up what's left of it with a file and solder the new lead to that).

    If you don't want to try this just yet you could just trim 5-10mm off the existing lead where it screws into the plug cap as this sometimes helps.

    I keep meaning to do a post about this with pictures, will see if I can find time for this 👍

    S 1 Reply Last reply
    1
    • VcelickaV Vcelicka

      @SpookDog It runs good to like 7k but even if i WOT it bogs after beeing opens up. I mean i can clean carb but i dont know how to clean HT lead and cap..... but i can for sure change the plug so i will try that

      S Offline
      S Offline
      SpookDog
      wrote on last edited by
      #10

      @Vcelicka

      Just wipe them down with a solvent to get any grease and dirt off…
      Also look for thin black ‘pencil’ lines on the plug & cap (inside) Carbon tracking can be a nuisance!…

      You can’t go wrong just replacing the spark plug and cap. If it still has troubles then do the HT lead….

      1 Reply Last reply
      0
      • HOTSHOT IIIH HOTSHOT III

        @Vcelicka This guy has had a go but he's just joining the new lead to a short stub of the old one which might not cure the problem.

        https://www.youtube.com/watch?v=jz3pklBtK9o&t=129s

        When the coils are manufactured the lead is just a push fit onto a little spike which is the coil output and corrosion can affect the connection here as well as the lead breaking down, hence why soldering makes such a good job of it and sometimes delivers a noticeable performance improvement (the spike sometimes breaks off when removing the old lead but don't worry, just gently clean up what's left of it with a file and solder the new lead to that).

        If you don't want to try this just yet you could just trim 5-10mm off the existing lead where it screws into the plug cap as this sometimes helps.

        I keep meaning to do a post about this with pictures, will see if I can find time for this 👍

        S Offline
        S Offline
        SpookDog
        wrote on last edited by SpookDog
        #11

        @HOTSHOT-III

        Would a rubber boot, like the one on hard plastic NGK caps slip over the HT lead to coil? Just as an extra layer after sealing. Also do you know if RTV silicone is insulating?…

        I’m extra attentive to corrosion since my wires started rotting off the back of the connector blocks!! 🙂 …

        HOTSHOT IIIH VcelickaV 2 Replies Last reply
        0
        • S SpookDog

          @HOTSHOT-III

          Would a rubber boot, like the one on hard plastic NGK caps slip over the HT lead to coil? Just as an extra layer after sealing. Also do you know if RTV silicone is insulating?…

          I’m extra attentive to corrosion since my wires started rotting off the back of the connector blocks!! 🙂 …

          HOTSHOT IIIH Offline
          HOTSHOT IIIH Offline
          HOTSHOT III
          wrote on last edited by
          #12

          @SpookDog Yes and yes 👍 👍 I've found rubber boots the right size for this in the past, and I think I used to use silicone sealant for this before discovering Shoe Goo.

          S 1 Reply Last reply
          0
          • HOTSHOT IIIH HOTSHOT III

            @SpookDog Yes and yes 👍 👍 I've found rubber boots the right size for this in the past, and I think I used to use silicone sealant for this before discovering Shoe Goo.

            S Offline
            S Offline
            SpookDog
            wrote on last edited by
            #13

            @HOTSHOT-III

            Cheers bud!
            It’s weird about the wheelie thing. I had my bike do this when I put in a new pilot jet and finally fixed the low rev spluttering and head gasket blowing! It was like an eager little puppy with loads of energy 😜🐾

            1 Reply Last reply
            0
            • S SpookDog

              @HOTSHOT-III

              Would a rubber boot, like the one on hard plastic NGK caps slip over the HT lead to coil? Just as an extra layer after sealing. Also do you know if RTV silicone is insulating?…

              I’m extra attentive to corrosion since my wires started rotting off the back of the connector blocks!! 🙂 …

              VcelickaV Offline
              VcelickaV Offline
              Vcelicka
              wrote on last edited by
              #14

              @SpookDog does this look good ? https://en.50factory.com/parts news/68749-antiparasites-with-red-wire-ngk-racing-cr2-cable.html Cant found it cheaper

              S 1 Reply Last reply
              0
              • VcelickaV Vcelicka

                @SpookDog does this look good ? https://en.50factory.com/parts news/68749-antiparasites-with-red-wire-ngk-racing-cr2-cable.html Cant found it cheaper

                S Offline
                S Offline
                SpookDog
                wrote on last edited by
                #15

                @Vcelicka

                You only really need the cap to start, & a new spark plug.
                But yeah, as long as it has a copper core in the wire, it looks fine…

                1 Reply Last reply
                0
                • VcelickaV Offline
                  VcelickaV Offline
                  Vcelicka
                  wrote on last edited by Vcelicka
                  #16

                  @HOTSHOT-III @OllieDTR @SpookDog Thanks so much for the help, i just took the cap from the cable an there was little to none cooper left so i cut it little down and cleaned the cap becous it was rusty . I took it around the hood and work absolutely great..... i will buy new plug and cap anyway beacous the rust . Thanks guys

                  OllieDTRO S 2 Replies Last reply
                  1
                  • VcelickaV Vcelicka

                    @HOTSHOT-III @OllieDTR @SpookDog Thanks so much for the help, i just took the cap from the cable an there was little to none cooper left so i cut it little down and cleaned the cap becous it was rusty . I took it around the hood and work absolutely great..... i will buy new plug and cap anyway beacous the rust . Thanks guys

                    OllieDTRO Offline
                    OllieDTRO Offline
                    OllieDTR
                    wrote on last edited by
                    #17

                    @Vcelicka

                    Glad you got it fixed mate always happy to help

                    1 Reply Last reply
                    0
                    • VcelickaV Vcelicka

                      @HOTSHOT-III @OllieDTR @SpookDog Thanks so much for the help, i just took the cap from the cable an there was little to none cooper left so i cut it little down and cleaned the cap becous it was rusty . I took it around the hood and work absolutely great..... i will buy new plug and cap anyway beacous the rust . Thanks guys

                      S Offline
                      S Offline
                      SpookDog
                      wrote on last edited by
                      #18

                      @Vcelicka

                      Happy for you bud! 👍 …

                      If you can afford it get a NGK rubber (red) ‘racing’ cap and an NGK Iridium spark plug. They are the Bogs Dollox! 😜 …

                      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