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DT125R FORUM

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  4. The Helios Project (Aprilia RS 125 Rotax 122 Biaggi Race Replica)

The Helios Project (Aprilia RS 125 Rotax 122 Biaggi Race Replica)

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  • declanD declan

    @calum so maybe a stupid question but was it rebuilt badly or not rebuilt at all

    CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #85

    @declan Nah man I don't think it's a stupid question.

    So it's been stripped before.

    There was a rusty bolt on the inside of the engine. That suggests that they just used a bolt that would normally be outside the engine on the inside. Since it was an OEM bolt.

    Also, the crank is really solid.

    I reckon, someone who didn't know what they were doing, rebuilt it poorly. Started it up. heard a horrendous noise, and then gave up on the idea after sinking too much money on it.

    The barrel doesn't look to have been rebored. So it was likely a new barrel at the time. The piston wasn't the highest quality, but it was a decent piston.

    I doubt the mains were changed, and they clearly didn't bother with the gearbox bearings. I reckon the minimal amount was done. But once it still didn't run right, they gave up on the idea.

    It's funny though.

    As I say, the cases are handy for my next project I'll be doing on this bike.

    And all I really wanted was the kickstart. I've managed to sell some of the bits I've stripped from it on eBay. So that's some way of clawing the money back out of it.

    Always Originate, Never Pirate!

    declanD 1 Reply Last reply
    0
    • CalumC Calum

      @declan Nah man I don't think it's a stupid question.

      So it's been stripped before.

      There was a rusty bolt on the inside of the engine. That suggests that they just used a bolt that would normally be outside the engine on the inside. Since it was an OEM bolt.

      Also, the crank is really solid.

      I reckon, someone who didn't know what they were doing, rebuilt it poorly. Started it up. heard a horrendous noise, and then gave up on the idea after sinking too much money on it.

      The barrel doesn't look to have been rebored. So it was likely a new barrel at the time. The piston wasn't the highest quality, but it was a decent piston.

      I doubt the mains were changed, and they clearly didn't bother with the gearbox bearings. I reckon the minimal amount was done. But once it still didn't run right, they gave up on the idea.

      It's funny though.

      As I say, the cases are handy for my next project I'll be doing on this bike.

      And all I really wanted was the kickstart. I've managed to sell some of the bits I've stripped from it on eBay. So that's some way of clawing the money back out of it.

      declanD Offline
      declanD Offline
      declan
      wrote on last edited by declan
      #86

      @calum sold bits already? Well it’s a good thing You didn’t want the engine as a whole isn’t it

      CalumC 1 Reply Last reply
      0
      • declanD declan

        @calum sold bits already? Well it’s a good thing You didn’t want the engine as a whole isn’t it

        CalumC Offline
        CalumC Offline
        Calum
        wrote on last edited by
        #87

        @declan Literally just wanted the idle gear and the kickstart mate. The rest I already have.

        But for this tasty little conversion I am going to do, it would be nice to have a pair of crankcases to hand 😉

        I ain't saying no more than that, you will see the results when I finish.

        Always Originate, Never Pirate!

        1 Reply Last reply
        0
        • CalumC Offline
          CalumC Offline
          Calum
          wrote on last edited by
          #88

          Updates are coming...

          But who can guess what custom modifications I will be doing on my RS?

          alt text

          I won't take credit for the idea. I always wanted to do it on my DT, but just couldn't justify the price.

          I then found a thread detailing a certain other bike made by Honda, whom did the exact conversion on these engines.

          HM CRE 125 if you're wondering. Looks awesomse, same engine as these RS's, except they ran electronic oil inject for 50% less oil consumption. Amongst other mods.

          But after not being able to find the parts I wanted, I gave up.

          Then I found this build thread on a certain other website, and mans was like...yes I'm doing that.

          Always Originate, Never Pirate!

          F NINJAN 2 Replies Last reply
          1
          • CalumC Calum

            Updates are coming...

            But who can guess what custom modifications I will be doing on my RS?

            alt text

            I won't take credit for the idea. I always wanted to do it on my DT, but just couldn't justify the price.

            I then found a thread detailing a certain other bike made by Honda, whom did the exact conversion on these engines.

            HM CRE 125 if you're wondering. Looks awesomse, same engine as these RS's, except they ran electronic oil inject for 50% less oil consumption. Amongst other mods.

            But after not being able to find the parts I wanted, I gave up.

            Then I found this build thread on a certain other website, and mans was like...yes I'm doing that.

            F Offline
            F Offline
            finnerz89
            wrote on last edited by
            #89

            @calum hydraulic clutch?

            Current bikes:
            DT125X '07
            Street Triple R '11
            Aprilia ETV1000 '02

            Previous:
            DR650RSE '96
            FJ1200 '92

            CalumC 1 Reply Last reply
            1
            • F finnerz89

              @calum hydraulic clutch?

              CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by
              #90

              @finnerz89 Spot on mate. How did you know?

              Always Originate, Never Pirate!

              declanD F 2 Replies Last reply
              0
              • CalumC Calum

                @finnerz89 Spot on mate. How did you know?

                declanD Offline
                declanD Offline
                declan
                wrote on last edited by
                #91

                @calum damn give me a chance lol

                1 Reply Last reply
                0
                • CalumC Offline
                  CalumC Offline
                  Calum
                  wrote on last edited by
                  #92

                  Front Mud Guards Arrived

                  alt text
                  alt text

                  I look forward to fitting that this weekend 😄

                  Always Originate, Never Pirate!

                  declanD NINJAN 2 Replies Last reply
                  0
                  • CalumC Calum

                    Front Mud Guards Arrived

                    alt text
                    alt text

                    I look forward to fitting that this weekend 😄

                    declanD Offline
                    declanD Offline
                    declan
                    wrote on last edited by
                    #93

                    @calum that looks slick how’s the engine coming along?

                    CalumC 1 Reply Last reply
                    0
                    • declanD declan

                      @calum that looks slick how’s the engine coming along?

                      CalumC Offline
                      CalumC Offline
                      Calum
                      wrote on last edited by
                      #94

                      @declan Should have some updates later in the week.

                      Always Originate, Never Pirate!

                      1 Reply Last reply
                      0
                      • CalumC Calum

                        @finnerz89 Spot on mate. How did you know?

                        F Offline
                        F Offline
                        finnerz89
                        wrote on last edited by
                        #95

                        @calum I've had 2 bikes with hydraulic clutches, recognised the cylinder lol

                        Current bikes:
                        DT125X '07
                        Street Triple R '11
                        Aprilia ETV1000 '02

                        Previous:
                        DR650RSE '96
                        FJ1200 '92

                        1 Reply Last reply
                        1
                        • CalumC Calum

                          Front Mud Guards Arrived

                          alt text
                          alt text

                          I look forward to fitting that this weekend 😄

                          NINJAN Offline
                          NINJAN Offline
                          NINJA
                          wrote on last edited by
                          #96

                          @calum I'm just curious, are the Magura Hydro clutches not compatible???

                          SEDUCED BY THE DARK SIDE!!!

                          CalumC 1 Reply Last reply
                          0
                          • NINJAN NINJA

                            @calum I'm just curious, are the Magura Hydro clutches not compatible???

                            CalumC Offline
                            CalumC Offline
                            Calum
                            wrote on last edited by Calum
                            #97

                            @ninja They're mega bucks though ain't they.

                            And probably not.

                            This is the clutch actuation on these engines

                            alt text

                            Always Originate, Never Pirate!

                            1 Reply Last reply
                            0
                            • MiniaM Offline
                              MiniaM Offline
                              Minia
                              wrote on last edited by
                              #98

                              This is really looking sweet 🙂

                              Yamaha DT125R Blue 2002, XT 125 1982, Yamaha WR250Z 1992, BMW GS650F 1994, Benelli BN302 2015

                              1 Reply Last reply
                              0
                              • CalumC Calum

                                Updates are coming...

                                But who can guess what custom modifications I will be doing on my RS?

                                alt text

                                I won't take credit for the idea. I always wanted to do it on my DT, but just couldn't justify the price.

                                I then found a thread detailing a certain other bike made by Honda, whom did the exact conversion on these engines.

                                HM CRE 125 if you're wondering. Looks awesomse, same engine as these RS's, except they ran electronic oil inject for 50% less oil consumption. Amongst other mods.

                                But after not being able to find the parts I wanted, I gave up.

                                Then I found this build thread on a certain other website, and mans was like...yes I'm doing that.

                                NINJAN Offline
                                NINJAN Offline
                                NINJA
                                wrote on last edited by
                                #99

                                @calum The Magura clutches are expensive, but apart from the cheap Chinese ones on ebay, there's not a lot else too choose from. I want one on my MX for-sure, can you post a link to the thread you found detailing the hydro conversion please???

                                SEDUCED BY THE DARK SIDE!!!

                                CalumC 1 Reply Last reply
                                0
                                • NINJAN NINJA

                                  @calum The Magura clutches are expensive, but apart from the cheap Chinese ones on ebay, there's not a lot else too choose from. I want one on my MX for-sure, can you post a link to the thread you found detailing the hydro conversion please???

                                  CalumC Offline
                                  CalumC Offline
                                  Calum
                                  wrote on last edited by
                                  #100

                                  @ninja You won't like it, lol. It was using PhotoFuckit and all the photos are messed up.

                                  I'll have this one done by the end of the week.

                                  Here is how Honda did it

                                  alt text
                                  alt text

                                  They've used the original clutch actuation for it.

                                  Here is the thread.

                                  http://www.125ccsportsbikes.com/forums/index.php?showtopic=100907

                                  Always Originate, Never Pirate!

                                  NINJAN 1 Reply Last reply
                                  1
                                  • CalumC Calum

                                    @ninja You won't like it, lol. It was using PhotoFuckit and all the photos are messed up.

                                    I'll have this one done by the end of the week.

                                    Here is how Honda did it

                                    alt text
                                    alt text

                                    They've used the original clutch actuation for it.

                                    Here is the thread.

                                    http://www.125ccsportsbikes.com/forums/index.php?showtopic=100907

                                    NINJAN Offline
                                    NINJAN Offline
                                    NINJA
                                    wrote on last edited by
                                    #101

                                    @calum OK Thanks, perhaps if you have the time you could post a tutorial on how to do it and the parts needed etc. please. 😉

                                    SEDUCED BY THE DARK SIDE!!!

                                    CalumC 1 Reply Last reply
                                    0
                                    • NINJAN NINJA

                                      @calum OK Thanks, perhaps if you have the time you could post a tutorial on how to do it and the parts needed etc. please. 😉

                                      CalumC Offline
                                      CalumC Offline
                                      Calum
                                      wrote on last edited by
                                      #102

                                      @ninja I plan to 😄

                                      Always Originate, Never Pirate!

                                      NINJAN 1 Reply Last reply
                                      1
                                      • CalumC Calum

                                        @ninja I plan to 😄

                                        NINJAN Offline
                                        NINJAN Offline
                                        NINJA
                                        wrote on last edited by
                                        #103

                                        @calum COOL Thanks, does either bike have the choke/hot start lever incorporated in the overall clutch lever/mount???

                                        SEDUCED BY THE DARK SIDE!!!

                                        CalumC 1 Reply Last reply
                                        0
                                        • NINJAN NINJA

                                          @calum COOL Thanks, does either bike have the choke/hot start lever incorporated in the overall clutch lever/mount???

                                          CalumC Offline
                                          CalumC Offline
                                          Calum
                                          wrote on last edited by
                                          #104

                                          @ninja Built into the left hand controls.

                                          Always Originate, Never Pirate!

                                          1 Reply Last reply
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