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. YPVS tips

YPVS tips

Scheduled Pinned Locked Moved Engine
30 Posts 6 Posters 3.6k 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.
  • Glynn123G Glynn123

    Didnt bother lubing my PV after rebuilding, ensured all surfaces were very clean and mirror polished, it doesnt do a full rotation and moves as much as say a rev counter or speedometer, the bushes would well outlast a piston un lubed, the thing you should really worry about it carbon sticking to the powervalve, so keep it clean and if you can be arsed mirror polish it.

    Irongamer727I Offline
    Irongamer727I Offline
    Irongamer727
    wrote on last edited by
    #9

    @glynn123 when cleaning the pv. Should you always buy new o rings or can they normally be reused? How many km until you should inspect and clean?

    CalumC ZrakoZ 2 Replies Last reply
    0
    • Irongamer727I Irongamer727

      @glynn123 when cleaning the pv. Should you always buy new o rings or can they normally be reused? How many km until you should inspect and clean?

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

      @irongamer727 Pretty sure it comes with the Athena gasket kit.

      I can't say I have ever gone out my way to replace the o ring or clean the valve.

      Always Originate, Never Pirate!

      1 Reply Last reply
      0
      • Irongamer727I Irongamer727

        @glynn123 when cleaning the pv. Should you always buy new o rings or can they normally be reused? How many km until you should inspect and clean?

        ZrakoZ Offline
        ZrakoZ Offline
        Zrako
        wrote on last edited by
        #11

        @irongamer727 when Im cleaned mine , I had new seal and old seal in hand and couldnt tell the difference.

        1979 Jawa Mustang 50
        2003 Gilera DNA 125 R.I.P
        2015 Keeway TX 125 SM
        2006 Yamaha DT 125 X

        declanD 1 Reply Last reply
        0
        • ZrakoZ Zrako

          @irongamer727 when Im cleaned mine , I had new seal and old seal in hand and couldnt tell the difference.

          declanD Offline
          declanD Offline
          declan
          wrote on last edited by
          #12

          @zrako when I rebuilt my top end my o rings were no bullshit litteraly square although my piston was about 2 years of hard riding old

          1 Reply Last reply
          0
          • Irongamer727I Offline
            Irongamer727I Offline
            Irongamer727
            wrote on last edited by
            #13

            The Haynes manual says you need to make sure the pv is mounted correctly and not 180° wrong. Is it possible to mount it wrong? I mean it only fits one way?

            declanD CalumC 2 Replies Last reply
            0
            • Irongamer727I Irongamer727

              The Haynes manual says you need to make sure the pv is mounted correctly and not 180° wrong. Is it possible to mount it wrong? I mean it only fits one way?

              declanD Offline
              declanD Offline
              declan
              wrote on last edited by
              #14

              @irongamer727 I guess it’s in the manual for a reason but I don’t actually know

              1 Reply Last reply
              0
              • Irongamer727I Irongamer727

                The Haynes manual says you need to make sure the pv is mounted correctly and not 180° wrong. Is it possible to mount it wrong? I mean it only fits one way?

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

                @irongamer727 It means ensuring it's not upside down....I'd imagine.

                Always Originate, Never Pirate!

                1 Reply Last reply
                0
                • J Offline
                  J Offline
                  Jens Eskildsen
                  wrote on last edited by
                  #16

                  Yup, it seems you can fit it upside down, thus restricking the bike.
                  Im pretty sure some bikes where sold in a restricted version like this.

                  1 Reply Last reply
                  0
                  • Irongamer727I Offline
                    Irongamer727I Offline
                    Irongamer727
                    wrote on last edited by
                    #17

                    Can you twist and turn the servo motor for the pv without risking causing damage to it? I need to do so since the current setting is not optimal.

                    CalumC 1 Reply Last reply
                    0
                    • Irongamer727I Irongamer727

                      Can you twist and turn the servo motor for the pv without risking causing damage to it? I need to do so since the current setting is not optimal.

                      CalumC Offline
                      CalumC Offline
                      Calum
                      wrote on last edited by
                      #18

                      @irongamer727 Your servo is fubar anyway right? So can't see what harm it would do.

                      Always Originate, Never Pirate!

                      Irongamer727I 1 Reply Last reply
                      0
                      • CalumC Calum

                        @irongamer727 Your servo is fubar anyway right? So can't see what harm it would do.

                        Irongamer727I Offline
                        Irongamer727I Offline
                        Irongamer727
                        wrote on last edited by
                        #19

                        Nope have a new one

                        1 Reply Last reply
                        0
                        • Irongamer727I Offline
                          Irongamer727I Offline
                          Irongamer727
                          wrote on last edited by
                          #20

                          0_1515093660714_20180103_161012.jpg

                          1 Reply Last reply
                          0
                          • Irongamer727I Offline
                            Irongamer727I Offline
                            Irongamer727
                            wrote on last edited by
                            #21

                            0_1515093729320_20180103_161033.jpg

                            my question is wheather or not you could "rotate" the servo manually in order to adjust the pv better. The 2nd pulley is obviously a bit too far out.

                            1 Reply Last reply
                            0
                            • CalumC Offline
                              CalumC Offline
                              Calum
                              wrote on last edited by
                              #22

                              Yeah isn't that how you're meant to adjust them anyway. Just use a set of spanners to adjust the locking nuts, the tension ought to pull the servo the right way. Then lock off.

                              I might be having a mental block, but that's how you adjust them.

                              Always Originate, Never Pirate!

                              declanD 1 Reply Last reply
                              0
                              • CalumC Calum

                                Yeah isn't that how you're meant to adjust them anyway. Just use a set of spanners to adjust the locking nuts, the tension ought to pull the servo the right way. Then lock off.

                                I might be having a mental block, but that's how you adjust them.

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

                                @calum think he might mean litteraly turning with your finger tips but the way you mentioned is the best way

                                CalumC 1 Reply Last reply
                                0
                                • declanD declan

                                  @calum think he might mean litteraly turning with your finger tips but the way you mentioned is the best way

                                  CalumC Offline
                                  CalumC Offline
                                  Calum
                                  wrote on last edited by
                                  #24

                                  @declan I think turn it from the PV housing should suffice.

                                  Always Originate, Never Pirate!

                                  declanD 1 Reply Last reply
                                  0
                                  • CalumC Calum

                                    @declan I think turn it from the PV housing should suffice.

                                    declanD Offline
                                    declanD Offline
                                    declan
                                    wrote on last edited by
                                    #25

                                    @calum yep to turn it with with your fingers would be massively overkill really

                                    Irongamer727I 1 Reply Last reply
                                    0
                                    • declanD declan

                                      @calum yep to turn it with with your fingers would be massively overkill really

                                      Irongamer727I Offline
                                      Irongamer727I Offline
                                      Irongamer727
                                      wrote on last edited by
                                      #26

                                      @declan naah, you guys underestimate the force required to turn that servo. Fingertips or pull HARD at the pulley

                                      1 Reply Last reply
                                      0
                                      • Irongamer727I Offline
                                        Irongamer727I Offline
                                        Irongamer727
                                        wrote on last edited by
                                        #27

                                        Do you think my servo settings are okay? It works beautifully and opens right. However I am not happy with the way it is adjusted. The 2nd pulley screw is as you can see much further out than the 1st. Have a look at the servo! No pleased with that either. Woud have wanted it more centred. But frankly that was the only way it would work. Seems okey?

                                        CalumC 1 Reply Last reply
                                        0
                                        • Irongamer727I Irongamer727

                                          Do you think my servo settings are okay? It works beautifully and opens right. However I am not happy with the way it is adjusted. The 2nd pulley screw is as you can see much further out than the 1st. Have a look at the servo! No pleased with that either. Woud have wanted it more centred. But frankly that was the only way it would work. Seems okey?

                                          CalumC Offline
                                          CalumC Offline
                                          Calum
                                          wrote on last edited by
                                          #28

                                          @irongamer727 Just whip the exhaust off and have a look. It should be flush with the exhaust port. Doesn't matter where the screws are as they should be shielded with the rubber grommets.

                                          Always Originate, Never Pirate!

                                          Irongamer727I 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