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DT125R FORUM

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  4. YPVS tips

YPVS tips

Scheduled Pinned Locked Moved Engine
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  • Irongamer727I Offline
    Irongamer727I Offline
    Irongamer727
    wrote on last edited by
    #1

    Should you lube the pv and bushes with simply 2t oil or should you grease the pv and bushes with like lithium soap? (saw it in a video)

    1 Reply Last reply
    0
    • CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #2

      Lithium soap?

      I mean, not much point really.

      Any grease you pack in there is going to burn off pretty quickly, and the excess unburnt two stroke oil is going to cake the valve.

      My recommendation would be to decoke it and clean it every once in a while.

      Ensure once in a while you give the bike hell, but other than that, that's about it

      Always Originate, Never Pirate!

      Irongamer727I 1 Reply Last reply
      0
      • CalumC Calum

        Lithium soap?

        I mean, not much point really.

        Any grease you pack in there is going to burn off pretty quickly, and the excess unburnt two stroke oil is going to cake the valve.

        My recommendation would be to decoke it and clean it every once in a while.

        Ensure once in a while you give the bike hell, but other than that, that's about it

        Irongamer727I Offline
        Irongamer727I Offline
        Irongamer727
        wrote on last edited by
        #3

        @calum it's a brand new cylinder! Surely it's going to need some sort of lube to last as long as possible and minimize wear?

        CalumC 1 Reply Last reply
        0
        • Irongamer727I Irongamer727

          @calum it's a brand new cylinder! Surely it's going to need some sort of lube to last as long as possible and minimize wear?

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

          @irongamer727 No?

          I mean, you use components that wear together. Brand new cylinder, brand new Powervalve bushes. Both will wear together.

          But the idea is that the bushes have O-Rings on them, so there should be very little metal on metal contact. It's not a highload component. Therefore, wear is minimal.

          You could put some white lithium grease on the components upon assembly, but it WILL burn off and eventually become a dry item.

          As said, they get caked in carbon and two stroke so it's a moot point anyway

          Always Originate, Never Pirate!

          Irongamer727I 1 Reply Last reply
          0
          • CalumC Calum

            @irongamer727 No?

            I mean, you use components that wear together. Brand new cylinder, brand new Powervalve bushes. Both will wear together.

            But the idea is that the bushes have O-Rings on them, so there should be very little metal on metal contact. It's not a highload component. Therefore, wear is minimal.

            You could put some white lithium grease on the components upon assembly, but it WILL burn off and eventually become a dry item.

            As said, they get caked in carbon and two stroke so it's a moot point anyway

            Irongamer727I Offline
            Irongamer727I Offline
            Irongamer727
            wrote on last edited by
            #5

            @calum will normal grease do? Such grease you use on the wheel axles for example?

            CalumC declanD 2 Replies Last reply
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            • Irongamer727I Irongamer727

              @calum will normal grease do? Such grease you use on the wheel axles for example?

              CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by
              #6

              @irongamer727 Yeah, as said, I really wouldn't go mad on it, cause it's going to burn off any how. Two stroke will probably be the best option here.

              Always Originate, Never Pirate!

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              • Irongamer727I Irongamer727

                @calum will normal grease do? Such grease you use on the wheel axles for example?

                declanD Offline
                declanD Offline
                declan
                wrote on last edited by
                #7

                @irongamer727 I used 2 stroke on mine so do as I did as I think the grease is highly not needed and I personally would not trust the grease as I’ve heated grease up general purpose ad it gets quite waxy and may even combust

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                • Glynn123G Offline
                  Glynn123G Offline
                  Glynn123
                  wrote on last edited by
                  #8

                  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 1 Reply Last reply
                  1
                  • 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

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                          • 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

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                              • 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!

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                                • 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
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