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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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  • Irongamer727I Irongamer727

    And I'm worrying about spending ยฃ70 on a full kickstart conversion for my dt... Guess your pocket is a bit bigger than mine though๐Ÿ˜‰

    CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #78

    @irongamer727 I did say it was cheaper to buy a whole engine just for the kickstart than the kickstart itself.

    Whilst this did cost more than ยฃ70, it didn't cost ยฃ600. But I was prepared to pay that for it.

    I will strip the engine tomorrow and finish off my current build.

    You understand though, you need a kickstart on a two stroke.

    Always Originate, Never Pirate!

    declanD 1 Reply Last reply
    0
    • CalumC Calum

      @irongamer727 I did say it was cheaper to buy a whole engine just for the kickstart than the kickstart itself.

      Whilst this did cost more than ยฃ70, it didn't cost ยฃ600. But I was prepared to pay that for it.

      I will strip the engine tomorrow and finish off my current build.

      You understand though, you need a kickstart on a two stroke.

      declanD Offline
      declanD Offline
      declan
      wrote on last edited by
      #79

      @calum your telling me a kick start is over 600 pound ๐Ÿคฏ

      CalumC 1 Reply Last reply
      0
      • declanD declan

        @calum your telling me a kick start is over 600 pound ๐Ÿคฏ

        CalumC Offline
        CalumC Offline
        Calum
        wrote on last edited by
        #80

        @declan New from Aprilia yeah. They only did them for the Sports Production series. The series they used in the SuperTeen MotoGP. So they were a highly specialised order!

        Always Originate, Never Pirate!

        CalumC 1 Reply Last reply
        0
        • CalumC Calum

          @declan New from Aprilia yeah. They only did them for the Sports Production series. The series they used in the SuperTeen MotoGP. So they were a highly specialised order!

          CalumC Offline
          CalumC Offline
          Calum
          wrote on last edited by Calum
          #81

          LOL at this engine. It was sold to me as :

          Came from a Sx in good condition just had new piston con rod main bearings been running for about 5 mind what you see is what you get

          It was also listed as a Rotex engine, not what it should be as Rotax.

          So I can't say I am really surprised. Item was well wrapped and delivered within 48 hours and I got what I actually wanted. But check out the rebuild on this engine.

          Firstly the head is absolutely ruined, straight in the bin this went.

          alt text

          Secondly the bore is totalled, but it's an aftermarket Mitaka one so runs a steel liner, meaning it can be rebored so isn't totally scrap. But definitely affects my resale value ๐Ÿ˜ž Was hoping to claw back a few sheets on this engine to pay for the conversion.

          alt text

          I didn't get a photo, but the crank journals have a nasty score in them which I would want to fix. Shame. The crank looks okay, although given the damage done to the rest of the engine, I would have it rebuilt.

          And the little end, which was probably what caused the fault in the first place.

          alt text

          Prepped the cases to shot blast next weekend.

          alt text

          I'm going to use this engine as a base to fabricate up the part I want. It's gutted other than the bearings, purely has a means to protect the journals. But in time I will rebuild this engine and leave it as a spare.

          Now back to my engine ๐Ÿ˜„

          alt text

          As you can see, it's now dual wielding both the Starter motor and the kick start mechanism, which is nice.

          Just missing a titanium bolt that secures the kicker in place, I shall get that ordered.

          Engine has been timed up and all new gears installed.

          Just waiting on PJME to get new clutches in and then hopefully sort the top end out next month. Got some tasty ideas for the top end.

          Always Originate, Never Pirate!

          declanD 1 Reply Last reply
          0
          • CalumC Calum

            LOL at this engine. It was sold to me as :

            Came from a Sx in good condition just had new piston con rod main bearings been running for about 5 mind what you see is what you get

            It was also listed as a Rotex engine, not what it should be as Rotax.

            So I can't say I am really surprised. Item was well wrapped and delivered within 48 hours and I got what I actually wanted. But check out the rebuild on this engine.

            Firstly the head is absolutely ruined, straight in the bin this went.

            alt text

            Secondly the bore is totalled, but it's an aftermarket Mitaka one so runs a steel liner, meaning it can be rebored so isn't totally scrap. But definitely affects my resale value ๐Ÿ˜ž Was hoping to claw back a few sheets on this engine to pay for the conversion.

            alt text

            I didn't get a photo, but the crank journals have a nasty score in them which I would want to fix. Shame. The crank looks okay, although given the damage done to the rest of the engine, I would have it rebuilt.

            And the little end, which was probably what caused the fault in the first place.

            alt text

            Prepped the cases to shot blast next weekend.

            alt text

            I'm going to use this engine as a base to fabricate up the part I want. It's gutted other than the bearings, purely has a means to protect the journals. But in time I will rebuild this engine and leave it as a spare.

            Now back to my engine ๐Ÿ˜„

            alt text

            As you can see, it's now dual wielding both the Starter motor and the kick start mechanism, which is nice.

            Just missing a titanium bolt that secures the kicker in place, I shall get that ordered.

            Engine has been timed up and all new gears installed.

            Just waiting on PJME to get new clutches in and then hopefully sort the top end out next month. Got some tasty ideas for the top end.

            declanD Offline
            declanD Offline
            declan
            wrote on last edited by
            #82

            @calum donโ€™t know what your on about mate looks ready to race to me ๐Ÿ˜‰ what did the piston look like

            CalumC 1 Reply Last reply
            0
            • declanD declan

              @calum donโ€™t know what your on about mate looks ready to race to me ๐Ÿ˜‰ what did the piston look like

              CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by
              #83

              @declan Piston wasn't too bad. Could have used that. But I threw it in the bin. Wasn't even forged.

              Always Originate, Never Pirate!

              declanD 1 Reply Last reply
              0
              • CalumC Calum

                @declan Piston wasn't too bad. Could have used that. But I threw it in the bin. Wasn't even forged.

                declanD Offline
                declanD Offline
                declan
                wrote on last edited by
                #84

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

                CalumC 1 Reply Last reply
                0
                • 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 itโ€™s a good thing You didnโ€™t want the engine as a whole isnโ€™t it

                    CalumC 1 Reply Last reply
                    0
                    • declanD declan

                      @calum sold bits already? Well itโ€™s a good thing You didnโ€™t want the engine as a whole isnโ€™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 ๐Ÿ˜‰

                      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 ๐Ÿ˜„

                                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 ๐Ÿ˜„

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

                                  @calum that looks slick howโ€™s the engine coming along?

                                  CalumC 1 Reply Last reply
                                  0
                                  • declanD declan

                                    @calum that looks slick howโ€™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 ๐Ÿ˜„

                                        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
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