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DT125R FORUM

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  4. Powervalve cap, right hand side question

Powervalve cap, right hand side question

Scheduled Pinned Locked Moved Engine
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  • D DTGREENLANER

    @Calum

    Ok mate cheers. There £50 though

    Do you reckon that brass bush inside the cover plays a part in supporting the powervalve and really with how it looks I should replace it?

    Because we was thinking just to make a bracket off the frame to keep it shut so it wouldn’t matter about the poor design? 😂

    CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #4

    @DTGREENLANER I have seen videos and read that those brass bushes are really important.

    There is a video floating about with a chap on a TDR250 where the bushes were so worn that it allowed for the piston to hit the valve and seized the engine.

    So £50 is cheaper than a rebore, new piston and fixing what else breaks.

    Always Originate, Never Pirate!

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    • CalumC Calum

      @DTGREENLANER I have seen videos and read that those brass bushes are really important.

      There is a video floating about with a chap on a TDR250 where the bushes were so worn that it allowed for the piston to hit the valve and seized the engine.

      So £50 is cheaper than a rebore, new piston and fixing what else breaks.

      D Offline
      D Offline
      DTGREENLANER
      wrote on last edited by DTGREENLANER
      #5

      @Calum

      Really!?

      Ok mate thank you, yeah definitely, I’ll just get it replaced then.

      Would you go genuine for the extra £10 or would you pick yambits one? I personally don’t know the quality of yambits parts?

      Cheers

      S 1 Reply Last reply
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      • D DTGREENLANER

        @Calum

        Really!?

        Ok mate thank you, yeah definitely, I’ll just get it replaced then.

        Would you go genuine for the extra £10 or would you pick yambits one? I personally don’t know the quality of yambits parts?

        Cheers

        S Offline
        S Offline
        SpookDog
        wrote on last edited by
        #6

        @DTGREENLANER

        £10? Genuine

        CalumC D 2 Replies Last reply
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        • S SpookDog

          @DTGREENLANER

          £10? Genuine

          CalumC Offline
          CalumC Offline
          Calum
          wrote on last edited by Calum
          #7

          @SpookDog I mean, I've never had a genuine one crack on me, but it doesn't sound great if it's happening a lot.

          I thought I saw a billet one on the internet that someone was making. If you can find that then that might be worth getting as that will be stronger than stock.

          The ones on the Athena 170 kit look billet made. I wonder if that'll fit the 125 barrel.

          alt text

          Always Originate, Never Pirate!

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          • S SpookDog

            @DTGREENLANER

            £10? Genuine

            D Offline
            D Offline
            DTGREENLANER
            wrote on last edited by
            #8

            @SpookDog

            Not £10, £10 extra for genuine so like £60 with the seal for genuine… £50 for yambits non genuine with seal

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            • CalumC Calum

              @SpookDog I mean, I've never had a genuine one crack on me, but it doesn't sound great if it's happening a lot.

              I thought I saw a billet one on the internet that someone was making. If you can find that then that might be worth getting as that will be stronger than stock.

              The ones on the Athena 170 kit look billet made. I wonder if that'll fit the 125 barrel.

              alt text

              D Offline
              D Offline
              DTGREENLANER
              wrote on last edited by
              #9

              @Calum

              Yeah fair enough man.

              Ah right, I’ve already ordered a genuine one.

              We’re still gonna make a bracket to keep pressure on the other side of the cap so the bolt bit don’t shear off again due to the poor design

              Cheers

              CalumC S 2 Replies Last reply
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              • D DTGREENLANER

                @Calum

                Yeah fair enough man.

                Ah right, I’ve already ordered a genuine one.

                We’re still gonna make a bracket to keep pressure on the other side of the cap so the bolt bit don’t shear off again due to the poor design

                Cheers

                CalumC Offline
                CalumC Offline
                Calum
                wrote on last edited by
                #10

                @DTGREENLANER Yeah it's interesting, I've had my DT since 2010 and It's never been an issue for me so it's most odd.

                The only thing I can think is perhaps the powervalve is warped or there is something causing untoward forces on it.

                Always Originate, Never Pirate!

                D 1 Reply Last reply
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                • D DTGREENLANER

                  @Calum

                  Yeah fair enough man.

                  Ah right, I’ve already ordered a genuine one.

                  We’re still gonna make a bracket to keep pressure on the other side of the cap so the bolt bit don’t shear off again due to the poor design

                  Cheers

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

                  @DTGREENLANER

                  Yeah I figured it was a tenner more. I don’t know why the rest of my post disappeared though! It was meant to say “that’s a no brainer!!” after 🙂 Genuine has always been better in my experience...

                  I was gonna say if you have any way of making it to copy the shape of the cap (& bolt hole) out of stainless steel, as a re enforcement plate.
                  There really should not be any sideways pressure on it though. I would of thought that it was over tightening that caused it in the first place...

                  D 1 Reply Last reply
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                  • CalumC Calum

                    @DTGREENLANER Yeah it's interesting, I've had my DT since 2010 and It's never been an issue for me so it's most odd.

                    The only thing I can think is perhaps the powervalve is warped or there is something causing untoward forces on it.

                    D Offline
                    D Offline
                    DTGREENLANER
                    wrote on last edited by DTGREENLANER
                    #12

                    @Calum

                    Yeah Ive had mine many of years to and only done it since the bolt bit sheared off.

                    Ah right, hopefully not! I’m hoping it’s happening just because the bolt bit had sheared off and using the washer idea doesn’t make it a tight fit…so it can easily open up and fly down the road..causing damage to it the brass bush when it impacts the concrete 😂 that’s what im hoping anyway lol

                    1 Reply Last reply
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                    • S SpookDog

                      @DTGREENLANER

                      Yeah I figured it was a tenner more. I don’t know why the rest of my post disappeared though! It was meant to say “that’s a no brainer!!” after 🙂 Genuine has always been better in my experience...

                      I was gonna say if you have any way of making it to copy the shape of the cap (& bolt hole) out of stainless steel, as a re enforcement plate.
                      There really should not be any sideways pressure on it though. I would of thought that it was over tightening that caused it in the first place...

                      D Offline
                      D Offline
                      DTGREENLANER
                      wrote on last edited by
                      #13

                      @SpookDog

                      Ahh I got ya! Yeah I’ve always tried to go genuine, just seeing if I could save a bit of money as I got 3 vehicles as it is and I’m trying to save up for a house lol

                      Ok mate thank you, When I get my mate to make something I’ll upload a picture of the finished result.

                      Yeah hopefully it’s just what I’m hoping it could be in my message back to Calum lol

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