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  4. Gilera sc 125 de-restriction help

Gilera sc 125 de-restriction help

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  • M Offline
    M Offline
    mikey
    wrote on last edited by
    #1

    Hi all, I have a gilera sc 125 which I've tried de-restricting but struggling with it, it has a strange limit at around 8 though revs!!! can not get past this

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    • CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #2

      What year is it?

      I appreciate they're DTRE engines, which inheriently aren't restricted, but I don't know what CDI they run.

      Your best bet is to get a Zeeltronic ignition system for the DTRE and fit that.

      But as a guess, I'd say it's the powervalve. If you pin the powervalve open and disconnect the YPVS and see how it goes then, that'll eliminate that as a potential issue.

      Assuming the engine is all healthy etc.

      I wouldn't have thought they'd run the reed switch etc, and if anything probably run the DTRE CDI and therefore maybe there is a green/black wire that you can earth to make the CDI full power.

      But again, they're even faster with a Zeeltronic.

      Always Originate, Never Pirate!

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      • M Offline
        M Offline
        mikey
        wrote on last edited by
        #3

        Hi mate it's a 08 plate bike and I'm sure they run a reed switch that stops it going past certain speed, not a clue how to sort it though

        CalumC 1 Reply Last reply
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        • M mikey

          Hi mate it's a 08 plate bike and I'm sure they run a reed switch that stops it going past certain speed, not a clue how to sort it though

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

          @mikey Oh cool, yeah they're different.

          https://www.125ccsportsbikes.com/threads/gilera-sc-125-help-on-frame-derestricting.67970/

          Apparently you just need to swap out a fuse somewhere to address certain parts of the restrictions.

          Always Originate, Never Pirate!

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          • M Offline
            M Offline
            mikey
            wrote on last edited by
            #5

            I've done that fuse under the seat that just activates the power valve, still get the speed restriction though

            S 1 Reply Last reply
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            • M mikey

              I've done that fuse under the seat that just activates the power valve, still get the speed restriction though

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

              @mikey

              Does it only rev to 8K in top gear, or every gear?…

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              • M Offline
                M Offline
                mikey
                wrote on last edited by
                #7

                Every gear mate

                CalumC S 2 Replies Last reply
                0
                • M mikey

                  Every gear mate

                  CalumC Offline
                  CalumC Offline
                  Calum
                  wrote on last edited by
                  #8

                  @mikey sounds like powervalve to me. Not setup right.

                  Always Originate, Never Pirate!

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                  • M Offline
                    M Offline
                    mikey
                    wrote on last edited by
                    #9

                    How do you set the power valve up mate

                    CalumC 1 Reply Last reply
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                    • M mikey

                      How do you set the power valve up mate

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

                      @mikey Have you tried Googling it?
                      https://www.google.com/search?q=setting+up+the+YPVS+powervalve+yamaha+dt+125&client=ubuntu&hs=Xk9&sca_esv=579665665&channel=fs&sxsrf=AM9HkKkXKveMG0PW-c8BNggc79VAamWexw%3A1699220016183&ei=MApIZYntCtSFhbIPqsiPkAk&ved=0ahUKEwiJxdbr562CAxXUQkEAHSrkA5IQ4dUDCA8&uact=5&oq=setting+up+the+YPVS+powervalve+yamaha+dt+125&gs_lp=Egxnd3Mtd2l6LXNlcnAiLHNldHRpbmcgdXAgdGhlIFlQVlMgcG93ZXJ2YWx2ZSB5YW1haGEgZHQgMTI1MgcQIRigARgKMgcQIRigARgKMgcQIRigARgKSIUeUKsHWNwccAJ4AZABAJgB1gGgAYkRqgEGMC4xNC4xuAEDyAEA-AEBwgIKEAAYRxjWBBiwA8ICBBAhGBXiAwQYACBBiAYBkAYI&sclient=gws-wiz-serp

                      Literally tells you without having to click through a link.

                      Always Originate, Never Pirate!

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                      • M mikey

                        Every gear mate

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

                        @mikey

                        I think it’s more likely that the CDI is restricting the revs in a kind of ‘limp mode’

                        Again. Read @Mr-Shadi post about the read switch.

                        S 1 Reply Last reply
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                        • S SpookDog

                          @mikey

                          I think it’s more likely that the CDI is restricting the revs in a kind of ‘limp mode’

                          Again. Read @Mr-Shadi post about the read switch.

                          S Offline
                          S Offline
                          SpookDog
                          wrote on last edited by
                          #12

                          You might have to earth out a wire on the CDI unit on your bike. There are some weird restrictions I don’t know about.
                          Like my TZR had a black/green stripe wire earthed out on it…

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